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The 16th Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS SpectraAhumada, RominaAllende Prieto, CarlosAlmeida, AndrésAnders, FriedrichAnderson, Scott F.Andrews, Brett H.Anguiano, BorjaArcodia, RiccardoArmengaud, EricAubert, MarieAvila, SantiagoAvila-Reese, VladimirBadenes, CarlesBalland, ChristopheBarger, KatBarrera-Ballesteros, Jorge K.Basu, SarbaniBautista, JulianBeaton, Rachael L.Beers, Timothy C.Benavides, B. Izamar T.Bender, Chad F.Bernardi, MariangelaBershady, MatthewBeutler, FlorianBidin, Christian MoniBird, JonathanBizyaev, DmitryBlanc, Guillermo A.Blanton, Michael R.Boquien, MédéricBorissova, JuraBovy, JoBrandt, W. N.Brinkmann, JonathanBrownstein, Joel R.Bundy, KevinBureau, MartinBurgasser, AdamBurtin, EtienneCano-Díaz, MarianaCapasso, RaffaellaCappellari, MicheleCarrera, RicardoChabanier, SolèneChaplin, WilliamChapman, MichaelCherinka, BrianChiappini, CristinaDoohyun Choi, PeterChojnowski, S. DrewChung, HaeunClerc, NicolasCoffey, DamienComerford, Julia M.Comparat, Johanda Costa, LuizCousinou, Marie-ClaudeCovey, KevinCrane, Jeffrey D.Cunha, Katiada Silva Ilha, GabrieleDai, Yu SophiaDamsted, Sanna B.Darling, JeremyDavidson, James W., Jr.Davies, RogerDawson, KyleDe, Nikhilde la Macorra, AxelDe Lee, Nathande Andrade Queiroz, Anna BárbaraDeconto Machado, Alicede la Torre, SylvainDell'Agli, Flaviadu Mas des Bourboux, HélionDiamond-Stanic, Aleksandar M.Dillon, SeanDonor, JohnDrory, NivDuckworth, ChrisDwelly, TomEbelke, GarrettEftekharzadeh, SarahEigenbrot, Arthur DavisElsworth, Yvonne P.Eracleous, MikeErfanianfar, GhazalehEscoffier, StephanieFan, XiaohuiFarr, EmilyFernández-Trincado, José G.Feuillet, DianeFinoguenov, AlexisFofie, PatriciaFraser-McKelvie, AmeliaFrinchaboy, Peter M.Fromenteau, SebastienFu, HaiGalbany, LluísGarcia, Rafael A.García-Hernández, D. A.Garma Oehmichen, Luis AlbertoGe, JunqiangGeimba Maia, Marcio AntonioGeisler, DougGelfand, JosephGoddy, JulianGonzalez-Perez, VioletaGrabowski, KathleenGreen, PaulGrier, Catherine J.Guo, HongGuy, JulienHarding, PaulHasselquist, StenHawken, Adam JamesHayes, Christian R.Hearty, FredHekker, S.Hogg, David W.Holtzman, Jon A.Horta, DannyHou, JiaminHsieh, Bau-ChingHuber, DanielHunt, Jason A. S.Ider Chitham, J.Imig, JulieJaber, MarianaJimenez Angel, Camilo EduardoJohnson, Jennifer A.Jones, Amy M.Jönsson, HenrikJullo, EricKim, YerimKinemuchi, KarenKirkpatrick, Charles C.,IVKite, George W.Klaene, MarkKneib, Jean-PaulKollmeier, Juna A.Kong, HuiKounkel, MarinaKrishnarao, DhaneshLacerna, IvanLan, Ting-WenLane, Richard R.Law, David R.Le Goff, Jean-MarcLeung, Henry W.Lewis, HannahLi, ChengLian, JianhuiLin, LihwaiLong, DanLonga-Peña, PenélopeLundgren, BrittLyke, Brad W.Ted Mackereth, J.MacLeod, Chelsea L.Majewski, Steven R.Manchado, ArturoMaraston, ClaudiaMartini, PaulMasseron, ThomasMasters, Karen L.Mathur, SavitaMcDermid, Richard M.Merloni, AndreaMerrifield, MichaelMészáros, SzabolcsMiglio, AndreaMinniti, DanteMinsley, RebeccaMiyaji, TakamitsuMohammad, Faizan GoharMosser, BenoitMueller, Eva-MariaMuna, DemitriMuñoz-Gutiérrez, AndreaMyers, Adam D.Nadathur, SeshadriNair, PreethiNandra, Kirpaldo Nascimento, Janaina CorreaNevin, Rebecca JeanNewman, Jeffrey A.Nidever, David L.Nitschelm, ChristianNoterdaeme, PasquierO'Connell, Julia E.Olmstead, Matthew D.Oravetz, DanielOravetz, AudreyOsorio, YeissonPace, Zachary J.Padilla, NelsonPalanque-Delabrouille, NathaliePalicio, Pedro A.Pan, Hsi-AnPan, KaikeParker, JamesPaviot, RomainPeirani, SebastienPeña Ramŕez, KarlaPenny, SamanthaPercival, Will J.Perez-Fournon, IsmaelPérez-Ràfols, IgnasiPetitjean, PatrickPieri, Matthew M.Pinsonneault, MarcPoovelil, Vijith JacobPovick, Joshua TylerPrakash, AbhishekPrice-Whelan, Adrian M.Raddick, M. JordanRaichoor, AnandRay, AmyRembold, Sandro BarbozaRezaie, MehdiRiffel, Rogemar A.Riffel, RogérioRix, Hans-WalterRobin, Annie C.Roman-Lopes, A.Román-Zúñiga, CarlosRose, BenjaminRoss, Ashley J.Rossi, GrazianoRowlands, KateRubin, Kate H. R.Salvato, MaraSánchez, Ariel G.Sánchez-Menguiano, LauraSánchez-Gallego, José R.Sayres, ConorSchaefer, AdamSchiavon, Ricardo P.Schimoia, Jaderson S.Schlafly, EdwardSchlegel, DavidSchneider, Donald P.Schultheis, MathiasSchwope, AxelSeo, Hee-JongSerenelli, AldoShafieloo, ArmanShamsi, Shoaib JamalShao, ZhengyiShen, ShiyinShetrone, MatthewShirley, RaphaelSilva Aguirre, VíctorSimon, Joshua D.Skrutskie, M. F.Slosar, AnžeSmethurst, RebeccaSobeck, JenniferSodi, Bernardo CervantesSouto, DiogoStark, David V.Stassun, Keivan G.Steinmetz, MatthiasStello, DennisStermer, JuliannaStorchi-Bergmann, ThaisaStreblyanska, AlinaStringfellow, Guy S.Stutz, AmeliaSuárez, GenaroSun, JingTaghizadeh-Popp, ManuchehrTalbot, Michael S.Tayar, JamieThakar, Aniruddha R.Theriault, RileyThomas, DanielThomas, Zak C.Tinker, JeremyTojeiro, RitaToledo, Hector HernandezTremonti, Christy A.Troup, Nicholas W.Tuttle, SarahUnda-Sanzana, EduardoValentini, MaricaVargas-González, JaimeVargas-Magaña, MarianaVázquez-Mata, Jose AntonioVivek, M.Wake, DavidWang, YutingWeaver, Benjamin AlanWeijmans, Anne-MarieWild, VivienneWilson, John C.Wilson, Robert F.Wolthuis, NathanWood-Vasey, W. M.Yan, RenbinYang, MengYèche, ChristopheZamora, OlgaZarrouk, PaulineZasowski, GailZhang, KaiZhao, ChengZhao, GongboZheng, ZhengZhu, GuangtunZou, HuDOI: info:10.3847/1538-4365/ab929ev. 2493
Ahumada, Romina, Allende Prieto, Carlos, Almeida, Andrés, Anders, Friedrich, Anderson, Scott F., Andrews, Brett H., Anguiano, Borja, Arcodia, Riccardo, Armengaud, Eric, Aubert, Marie, Avila, Santiago, Avila-Reese, Vladimir, Badenes, Carles, Balland, Christophe, Barger, Kat, Barrera-Ballesteros, Jorge K., Basu, Sarbani, Bautista, Julian, Beaton, Rachael L., Beers, Timothy C., Benavides, B. Izamar T., Bender, Chad F., Bernardi, Mariangela, Bershady, Matthew, Beutler, Florian et al. 2020. "The 16th Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra." The Astrophysical Journal Supplement Series 249:3. https://doi.org/10.3847/1538-4365/ab929e
ID: 157795
Type: article
Authors: Ahumada, Romina; Allende Prieto, Carlos; Almeida, Andrés; Anders, Friedrich; Anderson, Scott F.; Andrews, Brett H.; Anguiano, Borja; Arcodia, Riccardo; Armengaud, Eric; Aubert, Marie; Avila, Santiago; Avila-Reese, Vladimir; Badenes, Carles; Balland, Christophe; Barger, Kat; Barrera-Ballesteros, Jorge K.; Basu, Sarbani; Bautista, Julian; Beaton, Rachael L.; Beers, Timothy C.; Benavides, B. Izamar T.; Bender, Chad F.; Bernardi, Mariangela; Bershady, Matthew; Beutler, Florian; Bidin, Christian Moni; Bird, Jonathan; Bizyaev, Dmitry; Blanc, Guillermo A.; Blanton, Michael R.; Boquien, Médéric; Borissova, Jura; Bovy, Jo; Brandt, W. N.; Brinkmann, Jonathan; Brownstein, Joel R.; Bundy, Kevin; Bureau, Martin; Burgasser, Adam; Burtin, Etienne; Cano-Díaz, Mariana; Capasso, Raffaella; Cappellari, Michele; Carrera, Ricardo; Chabanier, Solène; Chaplin, William; Chapman, Michael; Cherinka, Brian; Chiappini, Cristina; Doohyun Choi, Peter; Chojnowski, S. Drew; Chung, Haeun; Clerc, Nicolas; Coffey, Damien; Comerford, Julia M.; Comparat, Johan; da Costa, Luiz; Cousinou, Marie-Claude; Covey, Kevin; Crane, Jeffrey D.; Cunha, Katia; da Silva Ilha, Gabriele; Dai, Yu Sophia; Damsted, Sanna B.; Darling, Jeremy; Davidson, James W., Jr.; Davies, Roger; Dawson, Kyle; De, Nikhil; de la Macorra, Axel; De Lee, Nathan; de Andrade Queiroz, Anna Bárbara; Deconto Machado, Alice; de la Torre, Sylvain; Dell'Agli, Flavia; du Mas des Bourboux, Hélion; Diamond-Stanic, Aleksandar M.; Dillon, Sean; Donor, John; Drory, Niv; Duckworth, Chris; Dwelly, Tom; Ebelke, Garrett; Eftekharzadeh, Sarah; Eigenbrot, Arthur Davis; Elsworth, Yvonne P.; Eracleous, Mike; Erfanianfar, Ghazaleh; Escoffier, Stephanie; Fan, Xiaohui; Farr, Emily; Fernández-Trincado, José G.; Feuillet, Diane; Finoguenov, Alexis; Fofie, Patricia; Fraser-McKelvie, Amelia; Frinchaboy, Peter M.; Fromenteau, Sebastien; Fu, Hai; Galbany, Lluís; Garcia, Rafael A.; García-Hernández, D. A.; Garma Oehmichen, Luis Alberto; Ge, Junqiang; Geimba Maia, Marcio Antonio; Geisler, Doug; Gelfand, Joseph; Goddy, Julian; Gonzalez-Perez, Violeta; Grabowski, Kathleen; Green, Paul; Grier, Catherine J.; Guo, Hong; Guy, Julien; Harding, Paul; Hasselquist, Sten; Hawken, Adam James; Hayes, Christian R.; Hearty, Fred; Hekker, S.; Hogg, David W.; Holtzman, Jon A.; Horta, Danny; Hou, Jiamin; Hsieh, Bau-Ching; Huber, Daniel; Hunt, Jason A. S.; Ider Chitham, J.; Imig, Julie; Jaber, Mariana; Jimenez Angel, Camilo Eduardo; Johnson, Jennifer A.; Jones, Amy M.; Jönsson, Henrik; Jullo, Eric; Kim, Yerim; Kinemuchi, Karen; Kirkpatrick, Charles C.,IV; Kite, George W.; Klaene, Mark; Kneib, Jean-Paul; Kollmeier, Juna A.; Kong, Hui; Kounkel, Marina; Krishnarao, Dhanesh; Lacerna, Ivan; Lan, Ting-Wen; Lane, Richard R.; Law, David R.; Le Goff, Jean-Marc; Leung, Henry W.; Lewis, Hannah; Li, Cheng; Lian, Jianhui; Lin, Lihwai; Long, Dan; Longa-Peña, Penélope; Lundgren, Britt; Lyke, Brad W.; Ted Mackereth, J.; MacLeod, Chelsea L.; Majewski, Steven R.; Manchado, Arturo; Maraston, Claudia; Martini, Paul; Masseron, Thomas; Masters, Karen L.; Mathur, Savita; McDermid, Richard M.; Merloni, Andrea; Merrifield, Michael; Mészáros, Szabolcs; Miglio, Andrea; Minniti, Dante; Minsley, Rebecca; Miyaji, Takamitsu; Mohammad, Faizan Gohar; Mosser, Benoit; Mueller, Eva-Maria; Muna, Demitri; Muñoz-Gutiérrez, Andrea; Myers, Adam D.; Nadathur, Seshadri; Nair, Preethi; Nandra, Kirpal; do Nascimento, Janaina Correa; Nevin, Rebecca Jean; Newman, Jeffrey A.; Nidever, David L.; Nitschelm, Christian; Noterdaeme, Pasquier; O'Connell, Julia E.; Olmstead, Matthew D.; Oravetz, Daniel; Oravetz, Audrey; Osorio, Yeisson; Pace, Zachary J.; Padilla, Nelson; Palanque-Delabrouille, Nathalie; Palicio, Pedro A.; Pan, Hsi-An; Pan, Kaike; Parker, James; Paviot, Romain; Peirani, Sebastien; Peña Ramŕez, Karla; Penny, Samantha; Percival, Will J.; Perez-Fournon, Ismael; Pérez-Ràfols, Ignasi; Petitjean, Patrick; Pieri, Matthew M.; Pinsonneault, Marc; Poovelil, Vijith Jacob; Povick, Joshua Tyler; Prakash, Abhishek; Price-Whelan, Adrian M.; Raddick, M. Jordan; Raichoor, Anand; Ray, Amy; Rembold, Sandro Barboza; Rezaie, Mehdi; Riffel, Rogemar A.; Riffel, Rogério; Rix, Hans-Walter; Robin, Annie C.; Roman-Lopes, A.; Román-Zúñiga, Carlos; Rose, Benjamin; Ross, Ashley J.; Rossi, Graziano; Rowlands, Kate; Rubin, Kate H. R.; Salvato, Mara; Sánchez, Ariel G.; Sánchez-Menguiano, Laura; Sánchez-Gallego, José R.; Sayres, Conor; Schaefer, Adam; Schiavon, Ricardo P.; Schimoia, Jaderson S.; Schlafly, Edward; Schlegel, David; Schneider, Donald P.; Schultheis, Mathias; Schwope, Axel; Seo, Hee-Jong; Serenelli, Aldo; Shafieloo, Arman; Shamsi, Shoaib Jamal; Shao, Zhengyi; Shen, Shiyin; Shetrone, Matthew; Shirley, Raphael; Silva Aguirre, Víctor; Simon, Joshua D.; Skrutskie, M. F.; Slosar, Anže; Smethurst, Rebecca; Sobeck, Jennifer; Sodi, Bernardo Cervantes; Souto, Diogo; Stark, David V.; Stassun, Keivan G.; Steinmetz, Matthias; Stello, Dennis; Stermer, Julianna; Storchi-Bergmann, Thaisa; Streblyanska, Alina; Stringfellow, Guy S.; Stutz, Amelia; Suárez, Genaro; Sun, Jing; Taghizadeh-Popp, Manuchehr; Talbot, Michael S.; Tayar, Jamie; Thakar, Aniruddha R.; Theriault, Riley; Thomas, Daniel; Thomas, Zak C.; Tinker, Jeremy; Tojeiro, Rita; Toledo, Hector Hernandez; Tremonti, Christy A.; Troup, Nicholas W.; Tuttle, Sarah; Unda-Sanzana, Eduardo; Valentini, Marica; Vargas-González, Jaime; Vargas-Magaña, Mariana; Vázquez-Mata, Jose Antonio; Vivek, M.; Wake, David; Wang, Yuting; Weaver, Benjamin Alan; Weijmans, Anne-Marie; Wild, Vivienne; Wilson, John C.; Wilson, Robert F.; Wolthuis, Nathan; Wood-Vasey, W. M.; Yan, Renbin; Yang, Meng; Yèche, Christophe; Zamora, Olga; Zarrouk, Pauline; Zasowski, Gail; Zhang, Kai; Zhao, Cheng; Zhao, Gongbo; Zheng, Zheng; Zheng, Zheng; Zhu, Guangtun; Zou, Hu
Abstract: This paper documents the 16th data release (DR16) from the Sloan Digital Sky Surveys (SDSS), the fourth and penultimate from the fourth phase (SDSS-IV). This is the first release of data from the Southern Hemisphere survey of the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2); new data from APOGEE-2 North are also included. DR16 is also notable as the final data release for the main cosmological program of the Extended Baryon Oscillation Spectroscopic Survey (eBOSS), and all raw and reduced spectra from that project are released here. DR16 also includes all the data from the Time Domain Spectroscopic Survey and new data from the SPectroscopic IDentification of ERosita Survey programs, both of which were co-observed on eBOSS plates. DR16 has no new data from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey (or the MaNGA Stellar Library "MaStar"). We also preview future SDSS-V operations (due to start in 2020), and summarize plans for the final SDSS-IV data release (DR17).
The Sloan Digital Sky Survey Reverberation Mapping Project: Mg II Lag Results from Four Years of MonitoringHomayouni, Y.Trump, Jonathan R.Grier, C. J.Horne, KeithShen, YueBrandt, W. N.Dawson, Kyle S.Alvarez, Gloria FonsecaGreen, Paul J.Hall, P. B.Hernández Santisteban, Juan V.Ho, Luis C.Kinemuchi, KarenKochanek, C. S.Li, Jennifer I. -HsiuPeterson, B. M.Schneider, D. P.Starkey, D. A.Bizyaev, DmitryPan, KaikeOravetz, DanielSimmons, AudreyDOI: info:10.3847/1538-4357/ababa9v. 90155
Homayouni, Y., Trump, Jonathan R., Grier, C. J., Horne, Keith, Shen, Yue, Brandt, W. N., Dawson, Kyle S., Alvarez, Gloria Fonseca, Green, Paul J., Hall, P. B., Hernández Santisteban, Juan V., Ho, Luis C., Kinemuchi, Karen, Kochanek, C. S., Li, Jennifer I. -Hsiu, Peterson, B. M., Schneider, D. P., Starkey, D. A., Bizyaev, Dmitry, Pan, Kaike, Oravetz, Daniel, and Simmons, Audrey. 2020. "The Sloan Digital Sky Survey Reverberation Mapping Project: Mg II Lag Results from Four Years of Monitoring." The Astrophysical Journal 901:55. https://doi.org/10.3847/1538-4357/ababa9
ID: 157691
Type: article
Authors: Homayouni, Y.; Trump, Jonathan R.; Grier, C. J.; Horne, Keith; Shen, Yue; Brandt, W. N.; Dawson, Kyle S.; Alvarez, Gloria Fonseca; Green, Paul J.; Hall, P. B.; Hernández Santisteban, Juan V.; Ho, Luis C.; Kinemuchi, Karen; Kochanek, C. S.; Li, Jennifer I. -Hsiu; Peterson, B. M.; Schneider, D. P.; Starkey, D. A.; Bizyaev, Dmitry; Pan, Kaike; Oravetz, Daniel; Simmons, Audrey
Abstract: We present reverberation mapping results for the Mg II λ2800 Å broad emission line in a sample of 193 quasars at $0.35\lt z\lt 1.7$ with photometric and spectroscopic monitoring observations from the Sloan Digital Sky Survey Reverberation Mapping project during 2014-2017. We find significant time lags between the Mg II and continuum lightcurves for 57 quasars, and define a "gold sample" of 24 quasars with the most reliable lag measurements. We estimate false-positive rates for each lag that range from 1% to 24%, with an average false-positive rate of 11% for the full sample and 8% for the gold sample. There are an additional ∼40 quasars with marginal Mg II lag detections, which may yield reliable lags after additional years of monitoring. The Mg II lags follow a radius-luminosity relation with a best-fit slope that is consistent with $\alpha =0.5$ , but with an intrinsic scatter of 0.36 dex that is significantly larger than found for the Hβ radius-luminosity relation. For targets with SDSS-RM lag measurements of other emission lines, we find that our Mg II lags are similar to the Hβ lags and ∼2-3 times larger than the C IV lags. This work significantly increases the number of Mg II broad-line lags and provides additional reverberation-mapped black hole masses, filling the redshift gap at the peak of supermassive black hole growth between the Hβ and C IV emission lines in optical spectroscopy.
The Sloan Digital Sky Survey Reverberation Mapping Project: the XMM-Newton X-Ray Source Catalog and Multiband CounterpartsLiu, TengMerloni, AndreaSimm, TorbenGreen, Paul J.Brandt, William N.Schneider, Donald P.Dwelly, TomSalvato, MaraBuchner, JohannesShen, YueNandra, KirpalGeorgakakis, AntonisHo, Luis C.DOI: info:10.3847/1538-4365/abb5b0v. 25032
Liu, Teng, Merloni, Andrea, Simm, Torben, Green, Paul J., Brandt, William N., Schneider, Donald P., Dwelly, Tom, Salvato, Mara, Buchner, Johannes, Shen, Yue, Nandra, Kirpal, Georgakakis, Antonis, and Ho, Luis C. 2020. "The Sloan Digital Sky Survey Reverberation Mapping Project: the XMM-Newton X-Ray Source Catalog and Multiband Counterparts." The Astrophysical Journal Supplement Series 250:32. https://doi.org/10.3847/1538-4365/abb5b0
ID: 158811
Type: article
Authors: Liu, Teng; Merloni, Andrea; Simm, Torben; Green, Paul J.; Brandt, William N.; Schneider, Donald P.; Dwelly, Tom; Salvato, Mara; Buchner, Johannes; Shen, Yue; Nandra, Kirpal; Georgakakis, Antonis; Ho, Luis C.
Abstract: The XMM-RM project was designed to provide X-ray coverage of the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) field. Forty-one XMM-Newton exposures, placed surrounding the Chandra AEGIS field, were taken, covering an area of 6.13 deg2 and reaching a nominal exposure depth of ˜15 ks. We present an X-ray catalog of 3553 sources detected in these data, using a PSF-fitting algorithm and a sample selection threshold that produces a ˜5% fraction of spurious sources. In addition to the PSF-fitting likelihood, we calculate a second source reliability measure based on Poisson theory using source and background counts within an aperture. Using the Poissonian likelihood, we select a subsample with a high purity and find that it has number count profiles similar to previous X-ray surveys. The Bayesian method "NWAY" was employed to identify counterparts of the X-ray sources from the optical Legacy and the IR unWISE catalogs, using a two-dimensional unWISE magnitude-color prior created from optical/IR counterparts of Chandra X-ray sources. A significant number of the optical/IR counterparts correspond to sources with low detection likelihoods, proving the value of retaining the low-likelihood detections in the catalog. A total of 932 of the XMM-RM sources are covered by SDSS spectroscopic observations, where 89% of them are classified as active galactic nuclei, and 71% of these active galactic nuclei are in the SDSS-RM quasar catalog. Among the SDSS-RM quasars, 80% are detectable at the depth of the XMM observations.
The Sloan Digital Sky Survey Quasar Catalog: Sixteenth Data ReleaseLyke, Brad W.Higley, Alexandra N.McLane, J. N.Schurhammer, Danielle P.Myers, Adam D.Ross, Ashley J.Dawson, KyleChabanier, SolèneMartini, PaulBusca, Nicolás G.Mas des Bourboux, Hélion duSalvato, MaraStreblyanska, AlinaZarrouk, PaulineBurtin, EtienneAnderson, Scott F.Bautista, JulianBizyaev, DmitryBrandt, W. N.Brinkmann, JonathanBrownstein, Joel R.Comparat, JohanGreen, Paulde la Macorra, AxelMuñoz Gutiérrez, AndreaHou, JiaminNewman, Jeffrey A.Palanque-Delabrouille, NathaliePâris, IsabellePercival, Will J.Petitjean, PatrickRich, JamesRossi, GrazianoSchneider, Donald P.Smith, AlexanderVivek, M.Weaver, Benjamin AlanDOI: info:10.3847/1538-4365/aba623v. 2508
Lyke, Brad W., Higley, Alexandra N., McLane, J. N., Schurhammer, Danielle P., Myers, Adam D., Ross, Ashley J., Dawson, Kyle, Chabanier, Solène, Martini, Paul, Busca, Nicolás G., Mas des Bourboux, Hélion du, Salvato, Mara, Streblyanska, Alina, Zarrouk, Pauline, Burtin, Etienne, Anderson, Scott F., Bautista, Julian, Bizyaev, Dmitry, Brandt, W. N., Brinkmann, Jonathan, Brownstein, Joel R., Comparat, Johan, Green, Paul, de la Macorra, Axel, Muñoz Gutiérrez, Andrea et al. 2020. "The Sloan Digital Sky Survey Quasar Catalog: Sixteenth Data Release." The Astrophysical Journal Supplement Series 250:8. https://doi.org/10.3847/1538-4365/aba623
ID: 157690
Type: article
Authors: Lyke, Brad W.; Higley, Alexandra N.; McLane, J. N.; Schurhammer, Danielle P.; Myers, Adam D.; Ross, Ashley J.; Dawson, Kyle; Chabanier, Solène; Martini, Paul; Busca, Nicolás G.; Mas des Bourboux, Hélion du; Salvato, Mara; Streblyanska, Alina; Zarrouk, Pauline; Burtin, Etienne; Anderson, Scott F.; Bautista, Julian; Bizyaev, Dmitry; Brandt, W. N.; Brinkmann, Jonathan; Brownstein, Joel R.; Comparat, Johan; Green, Paul; de la Macorra, Axel; Muñoz Gutiérrez, Andrea; Hou, Jiamin; Newman, Jeffrey A.; Palanque-Delabrouille, Nathalie; Pâris, Isabelle; Percival, Will J.; Petitjean, Patrick; Rich, James; Rossi, Graziano; Schneider, Donald P.; Smith, Alexander; Vivek, M.; Weaver, Benjamin Alan
Abstract: We present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar catalog from Data Release 16 of the extended Baryon Oscillation Spectroscopic Survey (eBOSS). This catalog comprises the largest selection of spectroscopically confirmed quasars to date. The full catalog includes two subcatalogs (the current versions are DR16Q_v4 and DR16Q_Superset_v3 at https://data.sdss.org/sas/dr16/eboss/qso/DR16Q/): a "superset" of all SDSS-IV/eBOSS objects targeted as quasars containing 1,440,615 observations and a quasar-only catalog containing 750,414 quasars, including 225,082 new quasars appearing in an SDSS data release for the first time, as well as known quasars from SDSS-I/II/III. We present automated identification and redshift information for these quasars alongside data from visual inspections for 320,161 spectra. The quasar-only catalog is estimated to be 99.8% complete with 0.3%-1.3% contamination. Automated and visual inspection redshifts are supplemented by redshifts derived via principal component analysis and emission lines. We include emission-line redshifts for Hα, Hβ, Mg II, C III], C IV, and Lyα. Identification and key characteristics generated by automated algorithms are presented for 99,856 broad absorption-line quasars and 35,686 damped Lyman alpha quasars. In addition to SDSS photometric data, we also present multiwavelength data for quasars from the Galaxy Evolution Explorer, UKIDSS, the Wide-field Infrared Survey Explorer, FIRST, ROSAT/2RXS, XMM-Newton, and Gaia. Calibrated digital optical spectra for these quasars can be obtained from the SDSS Science Archive Server.
Close Binary Companions to APOGEE DR16 Stars: 20,000 Binary-star Systems Across the Color-Magnitude DiagramPrice-Whelan, Adrian M.Hogg, David W.Rix, Hans-WalterBeaton, Rachael L.Lewis, Hannah M.Nidever, David L.Almeida, AndrésBadenes, CarlesBarba, RodolfoBeers, Timothy C.Carlberg, Joleen K.De Lee, NathanFernández-Trincado, José G.Frinchaboy, Peter M.García-Hernández, D. A.Green, Paul J.Hasselquist, StenLonga-Peña, PenélopeMajewski, Steven R.Nitschelm, ChristianSobeck, JenniferStassun, Keivan G.Stringfellow, Guy S.Troup, Nicholas W.DOI: info:10.3847/1538-4357/ab8accv. 8952
Price-Whelan, Adrian M., Hogg, David W., Rix, Hans-Walter, Beaton, Rachael L., Lewis, Hannah M., Nidever, David L., Almeida, Andrés, Badenes, Carles, Barba, Rodolfo, Beers, Timothy C., Carlberg, Joleen K., De Lee, Nathan, Fernández-Trincado, José G., Frinchaboy, Peter M., García-Hernández, D. A., Green, Paul J., Hasselquist, Sten, Longa-Peña, Penélope, Majewski, Steven R., Nitschelm, Christian, Sobeck, Jennifer, Stassun, Keivan G., Stringfellow, Guy S., and Troup, Nicholas W. 2020. "Close Binary Companions to APOGEE DR16 Stars: 20,000 Binary-star Systems Across the Color-Magnitude Diagram." The Astrophysical Journal 895:2. https://doi.org/10.3847/1538-4357/ab8acc
ID: 156979
Type: article
Authors: Price-Whelan, Adrian M.; Hogg, David W.; Rix, Hans-Walter; Beaton, Rachael L.; Lewis, Hannah M.; Nidever, David L.; Almeida, Andrés; Badenes, Carles; Barba, Rodolfo; Beers, Timothy C.; Carlberg, Joleen K.; De Lee, Nathan; Fernández-Trincado, José G.; Frinchaboy, Peter M.; García-Hernández, D. A.; Green, Paul J.; Hasselquist, Sten; Longa-Peña, Penélope; Majewski, Steven R.; Nitschelm, Christian; Sobeck, Jennifer; Stassun, Keivan G.; Stringfellow, Guy S.; Troup, Nicholas W.
Abstract: Many problems in contemporary astrophysics-from understanding the formation of black holes to untangling the chemical evolution of galaxies-rely on knowledge about binary stars. This, in turn, depends on the discovery and characterization of binary companions for large numbers of different kinds of stars in different chemical and dynamical environments. Current stellar spectroscopic surveys observe hundreds of thousands to millions of stars with (typically) few observational epochs, which allows for binary discovery but makes orbital characterization challenging. We use a custom Monte Carlo sampler (The Joker) to perform discovery and characterization of binary systems through radial velocities, in the regime of sparse, noisy, and poorly sampled multi-epoch data. We use it to generate posterior samplings in Keplerian parameters for 232,495 sources released in APOGEE Data Release 16. Our final catalog contains 19,635 high-confidence close-binary (P ≲ few years, a ≲ few $\mathrm{au}$ ) systems that show interesting relationships between binary occurrence rate and location in the color- magnitude diagram. We find notable faint companions at high masses (black hole candidates), at low masses (substellar candidates), and at very close separations (mass-transfer candidates). We also use the posterior samplings in a (toy) hierarchical inference to measure the long-period binary-star eccentricity distribution. We release the full set of posterior samplings for the entire parent sample of 232,495 stars. This set of samplings involves no heuristic "discovery" threshold and therefore can be used for myriad statistical purposes, including hierarchical inferences about binary-star populations and subthreshold searches.
Classifying Single Stars and Spectroscopic Binaries Using Optical Stellar TemplatesRoulston, Benjamin R.Green, Paul J.Kesseli, Aurora Y.DOI: info:10.3847/1538-4365/aba1e7v. 24934
Roulston, Benjamin R., Green, Paul J., and Kesseli, Aurora Y. 2020. "Classifying Single Stars and Spectroscopic Binaries Using Optical Stellar Templates." The Astrophysical Journal Supplement Series 249:34. https://doi.org/10.3847/1538-4365/aba1e7
ID: 157692
Type: article
Authors: Roulston, Benjamin R.; Green, Paul J.; Kesseli, Aurora Y.
Abstract: Stellar spectral classification is a fundamental tool of modern astronomy, providing insight into physical characteristics such as effective temperature, surface gravity, and metallicity. Accurate and fast spectral typing is an integral need for large all-sky spectroscopic surveys like the Sloan Digital Sky Survey (SDSS) and the Large Sky Area Multi-Object Fiber Spectroscopic Telescope. Here, we present the next version of PyHammer, a stellar spectral classification software that uses optical spectral templates and spectral line index measurements. PyHammer v2.0 extends the classification power to include dwarf carbon stars, DA white dwarf stars, and also double-lined spectroscopic binaries (SB2). This release also includes a new empirical library of luminosity-normalized spectra that can be used to flux calibrate observed spectra or to create synthetic SB2 spectra. We have generated physically reasonable SB2 combinations as templates, adding the ability to spectrally type SB2s to PyHammer. We test classification success rates on SB2 spectra, generated from the SDSS, across a wide range of spectral types and signal-to-noise ratios. Within the defined range of pairings described, more than 95% of SB2s are correctly classified.
The Sloan Digital Sky Survey Reverberation Mapping Project: Accretion and Broad Emission Line Physics from a Hypervariable QuasarDexter, JasonXin, ShuoShen, YueGrier, C. J.Liu, TengGezari, SuviMcGreer, Ian D.Brandt, W. N.Hall, P. B.Horne, KeithSimm, TorbenMerloni, AndreaGreen, Paul J.Vivek, M.Trump, Jonathan R.Homayouni, YasamanPeterson, B. M.Schneider, Donald P.Kinemuchi, K.Pan, KaikeBizyaev, DmitryDOI: info:10.3847/1538-4357/ab4354v. 88544
Dexter, Jason, Xin, Shuo, Shen, Yue, Grier, C. J., Liu, Teng, Gezari, Suvi, McGreer, Ian D., Brandt, W. N., Hall, P. B., Horne, Keith, Simm, Torben, Merloni, Andrea, Green, Paul J., Vivek, M., Trump, Jonathan R., Homayouni, Yasaman, Peterson, B. M., Schneider, Donald P., Kinemuchi, K., Pan, Kaike, and Bizyaev, Dmitry. 2019. "The Sloan Digital Sky Survey Reverberation Mapping Project: Accretion and Broad Emission Line Physics from a Hypervariable Quasar." The Astrophysical Journal 885:44. https://doi.org/10.3847/1538-4357/ab4354
ID: 154605
Type: article
Authors: Dexter, Jason; Xin, Shuo; Shen, Yue; Grier, C. J.; Liu, Teng; Gezari, Suvi; McGreer, Ian D.; Brandt, W. N.; Hall, P. B.; Horne, Keith; Simm, Torben; Merloni, Andrea; Green, Paul J.; Vivek, M.; Trump, Jonathan R.; Homayouni, Yasaman; Peterson, B. M.; Schneider, Donald P.; Kinemuchi, K.; Pan, Kaike; Bizyaev, Dmitry
Abstract: We analyze extensive spectroscopic and photometric data of the hypervariable quasar SDSS J141324+530527 (RMID 017) at z = 0.456, an optical "changing-look" quasar from the Sloan Digital Sky Survey Reverberation Mapping project that increased in optical luminosity by a factor ≃10 between 2014 and 2017. The observed broad emission lines all respond in luminosity and width to the changing optical continuum, as expected for photoionization in a stratified, virialized broad emission line region. The luminosity changes therefore result from intrinsic changes in accretion power rather than variable obscuration. The variability is continuous and apparently stochastic, disfavoring an origin as a discrete event such as a tidal disruption flare or microlensing event. It is coordinated on day timescales with blue leading red, consistent with reprocessing powering the entire optical spectral energy distribution. We show that this process cannot work in a standard thin disk geometry on energetic grounds, and would instead require a large covering factor reprocessor. Disk instability models could potentially also explain the data, provided that the instability sets in near the inner radius of a geometrically thick accretion disk.
A Chandra Study: Are Dwarf Carbon Stars Spun Up and Rejuvenated by Mass Transfer?Green, Paul J.Montez, RodolfoMazzoni, FernandoFilippazzo, JosephAnderson, Scott F.De Marco, OrsolaDrake, Jeremy J.Farihi, JayFrank, AdamKastner, Joel H.Miszalski, BrentRoulston, Benjamin R.DOI: info:10.3847/1538-4357/ab2bf4v. 88149
Green, Paul J., Montez, Rodolfo, Mazzoni, Fernando, Filippazzo, Joseph, Anderson, Scott F., De Marco, Orsola, Drake, Jeremy J., Farihi, Jay, Frank, Adam, Kastner, Joel H., Miszalski, Brent, and Roulston, Benjamin R. 2019. "A Chandra Study: Are Dwarf Carbon Stars Spun Up and Rejuvenated by Mass Transfer?." The Astrophysical Journal 881:49. https://doi.org/10.3847/1538-4357/ab2bf4
ID: 154244
Type: article
Authors: Green, Paul J.; Montez, Rodolfo; Mazzoni, Fernando; Filippazzo, Joseph; Anderson, Scott F.; De Marco, Orsola; Drake, Jeremy J.; Farihi, Jay; Frank, Adam; Kastner, Joel H.; Miszalski, Brent; Roulston, Benjamin R.
Abstract: Carbon stars (with C/O > 1) were long assumed to all be giants, because only asymptotic giant branch (AGB) stars dredge up significant carbon into their atmospheres. The case is nearly ironclad now that the formerly mysterious dwarf carbon (dC) stars are actually far more common than C giants and have accreted carbon-rich material from a former AGB companion, yielding a white dwarf (WD) and a dC star that has gained both significant mass and angular momentum. Some such dC systems have undergone a planetary nebula phase, and some may evolve to become CH, CEMP, or Ba giants. Recent studies indicate that most dCs are likely from older, metal-poor kinematic populations. Given the well-known anticorrelation of age and activity, dCs would not be expected to show significant X-ray emission related to coronal activity. However, accretion spin-up might be expected to rejuvenate magnetic dynamos in these post-mass-transfer binary systems. We describe our Chandra pilot study of six dCs selected from the SDSS for Hα emission and/or a hot WD companion, to test whether their X-ray emission strength and spectral properties are consistent with a rejuvenated dynamo. We detect all six dCs in the sample, which have X-ray luminosities ranging from log {L}{{x}}̃ 28.5-29.7, preliminary evidence that dCs may be active at a level consistent with stars that have short rotation periods of several days or less. More definitive results require a sample of typical dCs with deeper X-ray observations to better constrain their plasma temperatures.
Active Galactic Nucleus Pairs from the Sloan Digital Sky Survey. III. Chandra X-Ray Observations Unveil Obscured Double NucleiHou, MeicunLiu, XinGuo, HengxiaoLi, ZhiyuanShen, YueGreen, Paul J.DOI: info:10.3847/1538-4357/ab3225v. 88241
Hou, Meicun, Liu, Xin, Guo, Hengxiao, Li, Zhiyuan, Shen, Yue, and Green, Paul J. 2019. "Active Galactic Nucleus Pairs from the Sloan Digital Sky Survey. III. Chandra X-Ray Observations Unveil Obscured Double Nuclei." The Astrophysical Journal 882:41. https://doi.org/10.3847/1538-4357/ab3225
ID: 154424
Type: article
Authors: Hou, Meicun; Liu, Xin; Guo, Hengxiao; Li, Zhiyuan; Shen, Yue; Green, Paul J.
Abstract: We present Chandra ACIS-S X-ray imaging spectroscopy for five dual active galactic nucleus (AGN) candidates. Our targets were drawn from a sample of 1286 [O III]-selected AGN pairs systematically selected from the Sloan Digital Sky Survey Seventh Data Release. Each of the targets contains two nuclei separated by ̃3-9 kpc in projection, both of which are optically classified as Type 2 (obscured) AGNs based on diagnostic ratios of the narrow emission lines. Combined with independent, empirical star formation rate estimates based on the host-galaxy stellar continua, the new Chandra X-ray observations allow us to evaluate the dual-AGN hypothesis for each merging system. We confirm two (SDSS J0907+5203 and SDSS J1544+0446) of the five targets as bona fide dual AGNs. For the other three targets, the existing data are consistent with the dual-AGN scenario, but we cannot rule out the possibility of stellar/shock heating and/or one AGN ionizing both gaseous components in the merger. The average X-ray-to-[O III] luminosity ratio in our targets seems to be systematically smaller than that observed in single AGNs but is higher than that seen in dual AGNs selected from AGNs with double- peaked narrow emission lines. We suggest that the systematically smaller X-ray-to-[O III] luminosity ratio observed in dual AGNs than in single AGNs is due to a high nuclear gas column likely from strong merger- induced inflows. Unlike double-peaked-[O III]-selected dual AGNs, the new sample selected from resolved galaxy pairs are not subject to the orientation bias caused by the double-peak line-of-sight velocity splitting selection, which also contributes to lowering the X-ray-to-[O III] luminosity ratio.
Changing-look Quasar Candidates: First Results from Follow-up Spectroscopy of Highly Optically Variable QuasarsMacLeod, Chelsea L.Green, Paul J.Anderson, Scott F.Bruce, AlastairEracleous, MichaelGraham, MatthewHoman, DavidLawrence, AndyLebleu, AmyRoss, Nicholas P.Ruan, John J.Runnoe, JessieStern, DanielBurgett, WilliamChambers, Kenneth C.Kaiser, NickMagnier, EugeneMetcalfe, NigelDOI: info:10.3847/1538-4357/ab05e2v. 8748
MacLeod, Chelsea L., Green, Paul J., Anderson, Scott F., Bruce, Alastair, Eracleous, Michael, Graham, Matthew, Homan, David, Lawrence, Andy, Lebleu, Amy, Ross, Nicholas P., Ruan, John J., Runnoe, Jessie, Stern, Daniel, Burgett, William, Chambers, Kenneth C., Kaiser, Nick, Magnier, Eugene, and Metcalfe, Nigel. 2019. "Changing-look Quasar Candidates: First Results from Follow-up Spectroscopy of Highly Optically Variable Quasars." The Astrophysical Journal 874:8. https://doi.org/10.3847/1538-4357/ab05e2
ID: 155409
Type: article
Authors: MacLeod, Chelsea L.; Green, Paul J.; Anderson, Scott F.; Bruce, Alastair; Eracleous, Michael; Graham, Matthew; Homan, David; Lawrence, Andy; Lebleu, Amy; Ross, Nicholas P.; Ruan, John J.; Runnoe, Jessie; Stern, Daniel; Burgett, William; Chambers, Kenneth C.; Kaiser, Nick; Magnier, Eugene; Metcalfe, Nigel
Abstract: Active galactic nuclei (AGNs) that show strong rest-frame optical/UV variability in their blue continuum and broad line emission are classified as changing-look AGN, or at higher luminosities, changing- look quasars (CLQs). These surprisingly large and sometimes rapid transitions challenge accepted models of quasar physics and duty cycles, offer several new avenues for study of quasar host galaxies, and open a wider interpretation of the cause of differences between broad and narrow-line AGN. To better characterize extreme quasar variability, we present follow-up spectroscopy as part of a comprehensive search for CLQs across the full Sloan Digital Sky Survey (SDSS) footprint using spectroscopically confirmed quasars from the SDSS DR7 catalog. Our primary selection requires large-amplitude (| {{∆ }}g| > 1 mag, | {{∆ }}r| > 0.5 mag) variability over any of the available time baselines probed by the SDSS and Pan-STARRS 1 surveys. We employ photometry from the Catalina Sky Survey to verify variability behavior in CLQ candidates where available, and confirm CLQs using optical spectroscopy from the William Herschel, MMT, Magellan, and Palomar telescopes. For our adopted signal-to-noise ratio threshold on variability of broad Hβ emission, we find 17 new CLQs, yielding a confirmation rate of ≳20%. These candidates are at lower Eddington ratio relative to the overall quasar population, which supports a disk-wind model for the broad line region. Based on our sample, the CLQ fraction increases from 10% to roughly half as the continuum flux ratio between repeat spectra at 3420 Å increases from 1.5 to 6. We release a catalog of more than 200 highly variable candidates to facilitate future CLQ searches.
The Time-domain Spectroscopic Survey: Radial Velocity Variability in Dwarf Carbon StarsRoulston, Benjamin R.Green, Paul J.Ruan, John J.MacLeod, Chelsea L.Anderson, Scott F.Badenes, CarlesBrownstein, Joel R.Schneider, Donald P.Stassun, Keivan G.DOI: info:10.3847/1538-4357/ab1a3ev. 87744
Roulston, Benjamin R., Green, Paul J., Ruan, John J., MacLeod, Chelsea L., Anderson, Scott F., Badenes, Carles, Brownstein, Joel R., Schneider, Donald P., and Stassun, Keivan G. 2019. "The Time-domain Spectroscopic Survey: Radial Velocity Variability in Dwarf Carbon Stars." The Astrophysical Journal 877:44. https://doi.org/10.3847/1538-4357/ab1a3e
ID: 151845
Type: article
Authors: Roulston, Benjamin R.; Green, Paul J.; Ruan, John J.; MacLeod, Chelsea L.; Anderson, Scott F.; Badenes, Carles; Brownstein, Joel R.; Schneider, Donald P.; Stassun, Keivan G.
Abstract: Dwarf carbon (dC) stars (main-sequence stars showing carbon molecular bands) were initially thought to be an oxymoron because only asymptotic giant branch (AGB) stars dredge carbon into their atmospheres. Mass transfer from a former AGB companion that has since faded to a white dwarf seems the most likely explanation. Indeed, a few types of giants known to show anomalous abundances—notably, the CH, Ba and CEMP-s stars—are known to have a high binary frequency. The dC stars may be the enhanced-abundance progenitors of most, if not all of these systems, but this requires demonstrating a high binary frequency for dCs. Here, for a sample of 240 dC stars targeted for repeat spectroscopy by the SDSS-IV’s Time Domain Spectroscopic Survey, we analyze radial velocity (RV) variability to constrain the binary frequency and orbital properties. A handful of dC systems show large velocity variability (>100 km s‑1). We compare the dCs to a control sample with a similar distribution of magnitude, color, proper motion, and parallax. Using Markov chain Monte Carlo methods, we use the measured ΔRV distribution to estimate the binary fraction and the separation distribution assuming both a unimodal and bimodal distribution. We find the dC stars have an enhanced binary fraction of 95%, consistent with them being products of mass transfer. These models result in mean separations of less than 1 au corresponding to periods on the order of 1 yr. Our results support the conclusion that dC stars form from close binary systems via mass transfer.
The Analogous Structure of Accretion Flows in Supermassive and Stellar Mass Black Holes: New Insights from Faded Changing-look QuasarsRuan, John J.Anderson, Scott F.Eracleous, MichaelGreen, Paul J.Haggard, DarylMacLeod, Chelsea L.Runnoe, Jessie C.Sobolewska, Malgosia A.DOI: info:10.3847/1538-4357/ab3c1av. 88376
Ruan, John J., Anderson, Scott F., Eracleous, Michael, Green, Paul J., Haggard, Daryl, MacLeod, Chelsea L., Runnoe, Jessie C., and Sobolewska, Malgosia A. 2019. "The Analogous Structure of Accretion Flows in Supermassive and Stellar Mass Black Holes: New Insights from Faded Changing-look Quasars." The Astrophysical Journal 883:76. https://doi.org/10.3847/1538-4357/ab3c1a
ID: 154427
Type: article
Authors: Ruan, John J.; Anderson, Scott F.; Eracleous, Michael; Green, Paul J.; Haggard, Daryl; MacLeod, Chelsea L.; Runnoe, Jessie C.; Sobolewska, Malgosia A.
Abstract: Despite their factor of ̃108 difference in black hole mass, several lines of evidence suggest possible similarities between black hole accretion flows in active galactic nuclei (AGN) and Galactic X-ray binaries. However, it is still unclear whether the geometry of the disk- corona system in X-ray binaries directly scales up to AGN and whether this analogy still holds in different accretion states. We test this AGN/X-ray binary analogy by comparing the observed correlations between the UV-to-X-ray spectral index (α OX) and Eddington ratio in AGN to those predicted from observations of X-ray binary outbursts. This approach probes the geometry of their disk-corona systems as they transition between different accretion states. We use new Chandra X-ray and ground-based rest-UV observations of faded "changing-look" quasars to extend this comparison to lower Eddington ratios of ) and Eddington ratio in AGN to those predicted from observations of X-ray binary outbursts. This approach probes the geometry of their disk-corona systems as they transition between different accretion states. We use new Chandra X-ray and ground-based rest-UV observations of faded "changing-look" quasars to extend this comparison to lower Eddington ratios of -2, where observations of X-ray binaries predict a softening of α OX in AGN. We find that the observed correlations between the α OX and Eddington ratio of AGN displays a remarkable similarity to accretion state transitions in prototypical X-ray binary outbursts, including an inversion of this correlation at a critical Eddington ratio of ̃10-2. Our results suggest that the structures of black hole accretion flows directly scale across a factor of ̃108 in black hole mass and across different accretion states, enabling us to apply theoretical models of X-ray binaries to explain AGN phenomenology.
The Sloan Digital Sky Survey Reverberation Mapping Project: Improving Lag Detection with an Extended Multiyear BaselineShen, YueGrier, C. J.Horne, KeithBrandt, W. N.Trump, J. R.Hall, P. B.Kinemuchi, K.Starkey, DavidSchneider, D. P.Ho, Luis C.Homayouni, Y.I-Hsiu Li, JenniferMcGreer, Ian D.Peterson, B. M.Bizyaev, DmitryChen, YuguangDawson, K. S.Eftekharzadeh, SarahGreen, Paul J.Guo, YuchengJia, SiyaoJiang, LinhuaKneib, Jean-PaulLi, FengLi, ZefengNie, JundanOravetz, AudreyOravetz, DanielPan, KaikePetitjean, PatrickPonder, Kara A.Rogerson, JesseVivek, M.Zhang, TianmengZou, HuDOI: info:10.3847/2041-8213/ab3e0fv. 883L14
Shen, Yue, Grier, C. J., Horne, Keith, Brandt, W. N., Trump, J. R., Hall, P. B., Kinemuchi, K., Starkey, David, Schneider, D. P., Ho, Luis C., Homayouni, Y., I-Hsiu Li, Jennifer, McGreer, Ian D., Peterson, B. M., Bizyaev, Dmitry, Chen, Yuguang, Dawson, K. S., Eftekharzadeh, Sarah, Green, Paul J., Guo, Yucheng, Jia, Siyao, Jiang, Linhua, Kneib, Jean-Paul, Li, Feng, Li, Zefeng et al. 2019. "The Sloan Digital Sky Survey Reverberation Mapping Project: Improving Lag Detection with an Extended Multiyear Baseline." The Astrophysical Journal 883:L14. https://doi.org/10.3847/2041-8213/ab3e0f
ID: 154399
Type: article
Authors: Shen, Yue; Grier, C. J.; Horne, Keith; Brandt, W. N.; Trump, J. R.; Hall, P. B.; Kinemuchi, K.; Starkey, David; Schneider, D. P.; Ho, Luis C.; Homayouni, Y.; I-Hsiu Li, Jennifer; McGreer, Ian D.; Peterson, B. M.; Bizyaev, Dmitry; Chen, Yuguang; Dawson, K. S.; Eftekharzadeh, Sarah; Green, Paul J.; Guo, Yucheng; Jia, Siyao; Jiang, Linhua; Kneib, Jean-Paul; Li, Feng; Li, Zefeng; Nie, Jundan; Oravetz, Audrey; Oravetz, Daniel; Pan, Kaike; Petitjean, Patrick; Ponder, Kara A.; Rogerson, Jesse; Vivek, M.; Zhang, Tianmeng; Zou, Hu
Abstract: We investigate the effects of extended multiyear light curves (9 yr photometry and 5 yr spectroscopy) on the detection of time lags between the continuum variability and broad-line response of quasars at z ≳ 1.5, and compare with the results using 4 yr photometry+spectroscopy presented in a companion paper. We demonstrate the benefits of the extended light curves in three cases: (1) lags that are too long to be detected by the shorter-duration data but can be detected with the extended data; (2) lags that are recovered by the extended light curves but are missed in the shorter-duration data due to insufficient light- curve quality; and (3) lags for different broad-line species in the same object. These examples demonstrate the importance of long-term monitoring for reverberation mapping to detect lags for luminous quasars at high redshift, and the expected performance of the final data set from the Sloan Digital Sky Survey Reverberation Mapping project that will have 11 yr photometric and 7 yr spectroscopic baselines.
The Sloan Digital Sky Survey Reverberation Mapping Project: Sample CharacterizationShen, YueHall, Patrick B.Horne, KeithZhu, GuangtunMcGreer, IanSimm, TorbenTrump, Jonathan R.Kinemuchi, KarenBrandt, W. N.Green, Paul J.Grier, C. J.Guo, HengxiaoHo, Luis C.Homayouni, YasamanJiang, LinhuaI-Hsiu Li, JenniferMorganson, EricPetitjean, PatrickRichards, Gordon T.Schneider, Donald P.Starkey, D. A.Wang, ShuChambers, KenKaiser, NickKudritzki, Rolf-PeterMagnier, EugeneWaters, ChristopherDOI: info:10.3847/1538-4365/ab074fv. 24134
Shen, Yue, Hall, Patrick B., Horne, Keith, Zhu, Guangtun, McGreer, Ian, Simm, Torben, Trump, Jonathan R., Kinemuchi, Karen, Brandt, W. N., Green, Paul J., Grier, C. J., Guo, Hengxiao, Ho, Luis C., Homayouni, Yasaman, Jiang, Linhua, I-Hsiu Li, Jennifer, Morganson, Eric, Petitjean, Patrick, Richards, Gordon T., Schneider, Donald P., Starkey, D. A., Wang, Shu, Chambers, Ken, Kaiser, Nick, Kudritzki, Rolf-Peter et al. 2019. "The Sloan Digital Sky Survey Reverberation Mapping Project: Sample Characterization." The Astrophysical Journal Supplement Series 241:34. https://doi.org/10.3847/1538-4365/ab074f
ID: 155323
Type: article
Authors: Shen, Yue; Hall, Patrick B.; Horne, Keith; Zhu, Guangtun; McGreer, Ian; Simm, Torben; Trump, Jonathan R.; Kinemuchi, Karen; Brandt, W. N.; Green, Paul J.; Grier, C. J.; Guo, Hengxiao; Ho, Luis C.; Homayouni, Yasaman; Jiang, Linhua; I-Hsiu Li, Jennifer; Morganson, Eric; Petitjean, Patrick; Richards, Gordon T.; Schneider, Donald P.; Starkey, D. A.; Wang, Shu; Chambers, Ken; Kaiser, Nick; Kudritzki, Rolf-Peter; Magnier, Eugene; Waters, Christopher
Abstract: We present a detailed characterization of the 849 broad-line quasars from the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project. Our quasar sample covers a redshift range of 0.1 PSF < 21.7 without any other cuts on quasar properties. The main sample characterization includes: (1) spectral measurements of the continuum and broad emission lines for individual objects from the coadded first-season spectroscopy in 2014, (2) identification of broad and narrow absorption lines in the spectra, and (3) optical variability properties for continuum and broad lines from multi-epoch spectroscopy. We provide improved systemic redshift estimates for all quasars and demonstrate the effects of the signal-to- noise ratio on the spectral measurements. We compile measured properties for all 849 quasars along with supplemental multi-wavelength data for subsets of our sample from other surveys. The SDSS-RM sample probes a diverse range in quasar properties and shows well-detected continuum and broad-line variability for many objects from first-season monitoring data. The compiled properties serve as the benchmark for follow-up work based on SDSS-RM data. The spectral fitting tools are made public along with this work.
The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution ExperimentAbolfathi, BelaAguado, D. S.Aguilar, GabrielaAllende Prieto, CarlosAlmeida, AndresTasnim Ananna, TonimaAnders, FriedrichAnderson, Scott F.Andrews, Brett H.Anguiano, BorjaAragón-Salamanca, AlfonsoArgudo-Fernández, MariaArmengaud, EricAta, MetinAubourg, EricAvila-Reese, VladimirBadenes, CarlesBailey, StephenBalland, ChristopheBarger, Kathleen A.Barrera-Ballesteros, JorgeBartosz, CurtisBastien, FabienneBates, DominicBaumgarten, FalkBautista, JulianBeaton, RachaelBeers, Timothy C.Belfiore, FrancescoBender, Chad F.Bernardi, MariangelaBershady, Matthew A.Beutler, FlorianBird, Jonathan C.Bizyaev, DmitryBlanc, Guillermo A.Blanton, Michael R.Blomqvist, MichaelBolton, Adam S.Boquien, MédéricBorissova, JuraBovy, JoAndres Bradna Diaz, ChristianNielsen Brandt, WilliamBrinkmann, JonathanBrownstein, Joel R.Bundy, KevinBurgasser, Adam J.Burtin, EtienneBusca, Nicolás G.Cañas, Caleb I.Cano-Díaz, MarianaCappellari, MicheleCarrera, RicardoCasey, Andrew R.Cervantes Sodi, BernardoChen, YanpingCherinka, BrianChiappini, CristinaDoohyun Choi, PeterChojnowski, DrewChuang, Chia-HsunChung, HaeunClerc, NicolasCohen, Roger E.Comerford, Julia M.Comparat, JohanCorrea do Nascimento, Janainada Costa, LuizCousinou, Marie-ClaudeCovey, KevinCrane, Jeffrey D.Cruz-Gonzalez, IreneCunha, Katiada Silva Ilha, GabrieleDamke, Guillermo J.Darling, JeremyDavidson, James W., Jr.Dawson, Kylede Icaza Lizaola,Miguel Angel C.de la Macorra, Axelde la Torre, SylvainDe Lee, Nathande Sainte Agathe, VictoriaDeconto Machado, AliceDell'Agli, FlaviaDelubac, TimothéeDiamond-Stanic, Aleksandar M.Donor, JohnJosé Downes, JuanDrory, Nivdu Mas des Bourboux, HélionDuckworth, Christopher J.Dwelly, TomDyer, JamieEbelke, GarrettDavis Eigenbrot, ArthurEisenstein, Daniel J.Elsworth, Yvonne P.Emsellem, EricEracleous, MichaelErfanianfar, GhazalehEscoffier, StephanieFan, XiaohuiFernández Alvar, EmmaFernandez-Trincado, J. G.Cirolini, Rafael FernandoFeuillet, DianeFinoguenov, AlexisFleming, Scott W.Font-Ribera, AndreuFreischlad, GordonFrinchaboy, PeterFu, HaiGómez Maqueo Chew, YilenGalbany, LluísGarcía Pérez, Ana E.Garcia-Dias, R.García-Hernández, D. A.Garma Oehmichen, Luis AlbertoGaulme, PatrickGelfand, JosephGil-Marín, HéctorGillespie, Bruce A.Goddard, DanielGonzález Hernández, Jonay I.Gonzalez-Perez, VioletaGrabowski, KathleenGreen, Paul J.Grier, Catherine J.Gueguen, AlainGuo, HongGuy, JulienHagen, AlexHall, PatrickHarding, PaulHasselquist, StenHawley, SuzanneHayes, Christian R.Hearty, FredHekker, SaskiaHernandez, JesusHernandez Toledo, HectorHogg, David W.Holley-Bockelmann, KellyHoltzman, Jon A.Hou, JiaminHsieh, Bau-ChingHunt, Jason A. S.Hutchinson, Timothy A.Hwang, Ho SeongJimenez Angel, Camilo EduardoJohnson, Jennifer A.Jones, AmyJönsson, HenrikJullo, EricSakil Khan, FahimKinemuchi, KarenKirkby, DavidKirkpatrick, Charles C.,IVKitaura, Francisco-ShuKnapp, Gillian R.Kneib, Jean-PaulKollmeier, Juna A.Lacerna, IvanLane, Richard R.Lang, DustinLaw, David R.Le Goff, Jean-MarcLee, Young-BaeLi, HongyuLi, ChengLian, JianhuiLiang, YuLima, MarcosLin, LihwaiLong, DanLucatello, SaraLundgren, BrittMackereth, J. TedMacLeod, Chelsea L.Mahadevan, SuvrathGeimba Maia, Marcio AntonioMajewski, StevenManchado, ArturoMaraston, ClaudiaMariappan, VivekMarques-Chaves, RuiMasseron, ThomasMasters, Karen L.McDermid, Richard M.McGreer, Ian D.Melendez, MatthewMeneses-Goytia, SofiaMerloni, AndreaMerrifield, Michael R.Meszaros, SzabolcsMeza, AndresMinchev, IvanMinniti, DanteMueller, Eva-MariaMuller-Sanchez, FranciscoMuna, DemitriMuñoz, Ricardo R.Myers, Adam D.Nair, PreethiNandra, KirpalNess, MelissaNewman, Jeffrey A.Nichol, Robert C.Nidever, David L.Nitschelm, ChristianNoterdaeme, PasquierO'Connell, JuliaOelkers, Ryan JamesOravetz, AudreyOravetz, DanielAquino Ortíz, ErikOsorio, YeissonPace, ZachPadilla, NelsonPalanque-Delabrouille, NathalieAlonso Palicio, PedroPan, Hsi-AnPan, KaikeParikh, TaniyaPâris, IsabellePark, ChangbomPeirani, SebastienPellejero-Ibanez, MarcosPenny, SamanthaPercival, Will J.Perez-Fournon, IsmaelPetitjean, PatrickPieri, Matthew M.Pinsonneault, MarcPisani, AlicePrada, FranciscoPrakash, AbhishekQueiroz, Anna Bárbara de AndradeRaddick, M. JordanRaichoor, AnandBarboza Rembold, SandroRichstein, HannahRiffel, Rogemar A.Riffel, RogérioRix, Hans-WalterRobin, Annie C.Rodríguez Torres, SergioRomán-Zúñiga, CarlosRoss, Ashley J.Rossi, GrazianoRuan, JohnRuggeri, RossanaRuiz, JoseSalvato, MaraSánchez, Ariel G.Sánchez, Sebastián F.Sanchez Almeida, JorgeSánchez-Gallego, José R.Santana Rojas, Felipe AntonioSantiago, Basílio XavierSchiavon, Ricardo P.Schimoia, Jaderson S.Schlafly, EdwardSchlegel, DavidSchneider, Donald P.Schuster, William J.Schwope, AxelSeo, Hee-JongSerenelli, AldoShen, ShiyinShen, YueShetrone, MatthewShull, MichaelSilva Aguirre, VíctorSimon, Joshua D.Skrutskie, MikeSlosar, AnzeSmethurst, RebeccaSmith, VerneSobeck, JenniferSomers, GarrettSouter, Barbara J.Souto, DiogoSpindler, AshleyStark, David V.Stassun, KeivanSteinmetz, MatthiasStello, DennisStorchi-Bergmann, ThaisaStreblyanska, AlinaStringfellow, Guy S.Suárez, GenaroSun, JingSzigeti, LaszloTaghizadeh-Popp, ManuchehrTalbot, Michael S.Tang, BaitianTao, CharlingTayar, JamieTembe, MitaTeske, JohannaThakar, Aniruddha R.Thomas, DanielTissera, PatriciaTojeiro, RitaTremonti, ChristyTroup, Nicholas W.Urry, MegValenzuela, O.van den Bosch, RemcoVargas-González, JaimeVargas-Magaña, MarianaVazquez, Jose AlbertoVillanova, SandroVogt, NicoleWake, DavidWang, YutingWeaver, Benjamin AlanWeijmans, Anne-MarieWeinberg, David H.Westfall, Kyle B.Whelan, David G.Wilcots, EricWild, VivienneWilliams, Rob A.Wilson, JohnWood-Vasey, W. M.Wylezalek, DominikaXiao, TingYan, RenbinYang, MengYbarra, Jason E.Yèche, ChristopheZakamska, NadiaZamora, OlgaZarrouk, PaulineZasowski, GailZhang, KaiZhao, ChengZhao, Gong-boZheng, ZhengZhou, Zhi-MinZhu, GuangtunZinn, Joel C.Zou, HuDOI: info:10.3847/1538-4365/aa9e8av. 23542
Abolfathi, Bela, Aguado, D. S., Aguilar, Gabriela, Allende Prieto, Carlos, Almeida, Andres, Tasnim Ananna, Tonima, Anders, Friedrich, Anderson, Scott F., Andrews, Brett H., Anguiano, Borja, Aragón-Salamanca, Alfonso, Argudo-Fernández, Maria, Armengaud, Eric, Ata, Metin, Aubourg, Eric, Avila-Reese, Vladimir, Badenes, Carles, Bailey, Stephen, Balland, Christophe, Barger, Kathleen A., Barrera-Ballesteros, Jorge, Bartosz, Curtis, Bastien, Fabienne, Bates, Dominic, Baumgarten, Falk et al. 2018. "The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution Experiment." The Astrophysical Journal Supplement Series 235:42. https://doi.org/10.3847/1538-4365/aa9e8a
ID: 147060
Type: article
Authors: Abolfathi, Bela; Aguado, D. S.; Aguilar, Gabriela; Allende Prieto, Carlos; Almeida, Andres; Tasnim Ananna, Tonima; Anders, Friedrich; Anderson, Scott F.; Andrews, Brett H.; Anguiano, Borja; Aragón-Salamanca, Alfonso; Argudo-Fernández, Maria; Armengaud, Eric; Ata, Metin; Aubourg, Eric; Avila-Reese, Vladimir; Badenes, Carles; Bailey, Stephen; Balland, Christophe; Barger, Kathleen A.; Barrera-Ballesteros, Jorge; Bartosz, Curtis; Bastien, Fabienne; Bates, Dominic; Baumgarten, Falk; Bautista, Julian; Beaton, Rachael; Beers, Timothy C.; Belfiore, Francesco; Bender, Chad F.; Bernardi, Mariangela; Bershady, Matthew A.; Beutler, Florian; Bird, Jonathan C.; Bizyaev, Dmitry; Blanc, Guillermo A.; Blanton, Michael R.; Blomqvist, Michael; Bolton, Adam S.; Boquien, Médéric; Borissova, Jura; Bovy, Jo; Andres Bradna Diaz, Christian; Nielsen Brandt, William; Brinkmann, Jonathan; Brownstein, Joel R.; Bundy, Kevin; Burgasser, Adam J.; Burtin, Etienne; Busca, Nicolás G.; Cañas, Caleb I.; Cano-Díaz, Mariana; Cappellari, Michele; Carrera, Ricardo; Casey, Andrew R.; Cervantes Sodi, Bernardo; Chen, Yanping; Cherinka, Brian; Chiappini, Cristina; Doohyun Choi, Peter; Chojnowski, Drew; Chuang, Chia-Hsun; Chung, Haeun; Clerc, Nicolas; Cohen, Roger E.; Comerford, Julia M.; Comparat, Johan; Correa do Nascimento, Janaina; da Costa, Luiz; Cousinou, Marie-Claude; Covey, Kevin; Crane, Jeffrey D.; Cruz-Gonzalez, Irene; Cunha, Katia; da Silva Ilha, Gabriele; Damke, Guillermo J.; Darling, Jeremy; Davidson, James W., Jr.; Dawson, Kyle; de Icaza Lizaola,Miguel Angel C.; de la Macorra, Axel; de la Torre, Sylvain; De Lee, Nathan; de Sainte Agathe, Victoria; Deconto Machado, Alice; Dell'Agli, Flavia; Delubac, Timothée; Diamond-Stanic, Aleksandar M.; Donor, John; José Downes, Juan; Drory, Niv; du Mas des Bourboux, Hélion; Duckworth, Christopher J.; Dwelly, Tom; Dyer, Jamie; Ebelke, Garrett; Davis Eigenbrot, Arthur; Eisenstein, Daniel J.; Elsworth, Yvonne P.; Emsellem, Eric; Eracleous, Michael; Erfanianfar, Ghazaleh; Escoffier, Stephanie; Fan, Xiaohui; Fernández Alvar, Emma; Fernandez-Trincado, J. G.; Cirolini, Rafael Fernando; Feuillet, Diane; Finoguenov, Alexis; Fleming, Scott W.; Font-Ribera, Andreu; Freischlad, Gordon; Frinchaboy, Peter; Fu, Hai; Gómez Maqueo Chew, Yilen; Galbany, Lluís; García Pérez, Ana E.; Garcia-Dias, R.; García-Hernández, D. A.; Garma Oehmichen, Luis Alberto; Gaulme, Patrick; Gelfand, Joseph; Gil-Marín, Héctor; Gillespie, Bruce A.; Goddard, Daniel; González Hernández, Jonay I.; Gonzalez-Perez, Violeta; Grabowski, Kathleen; Green, Paul J.; Grier, Catherine J.; Gueguen, Alain; Guo, Hong; Guy, Julien; Hagen, Alex; Hall, Patrick; Harding, Paul; Hasselquist, Sten; Hawley, Suzanne; Hayes, Christian R.; Hearty, Fred; Hekker, Saskia; Hernandez, Jesus; Hernandez Toledo, Hector; Hogg, David W.; Holley-Bockelmann, Kelly; Holtzman, Jon A.; Hou, Jiamin; Hsieh, Bau-Ching; Hunt, Jason A. S.; Hutchinson, Timothy A.; Hwang, Ho Seong; Jimenez Angel, Camilo Eduardo; Johnson, Jennifer A.; Jones, Amy; Jönsson, Henrik; Jullo, Eric; Sakil Khan, Fahim; Kinemuchi, Karen; Kirkby, David; Kirkpatrick, Charles C.,IV; Kitaura, Francisco-Shu; Knapp, Gillian R.; Kneib, Jean-Paul; Kollmeier, Juna A.; Lacerna, Ivan; Lane, Richard R.; Lang, Dustin; Law, David R.; Le Goff, Jean-Marc; Lee, Young-Bae; Li, Hongyu; Li, Cheng; Lian, Jianhui; Liang, Yu; Lima, Marcos; Lin, Lihwai; Long, Dan; Lucatello, Sara; Lundgren, Britt; Mackereth, J. Ted; MacLeod, Chelsea L.; Mahadevan, Suvrath; Geimba Maia, Marcio Antonio; Majewski, Steven; Manchado, Arturo; Maraston, Claudia; Mariappan, Vivek; Marques-Chaves, Rui; Masseron, Thomas; Masters, Karen L.; McDermid, Richard M.; McGreer, Ian D.; Melendez, Matthew; Meneses-Goytia, Sofia; Merloni, Andrea; Merrifield, Michael R.; Meszaros, Szabolcs; Meza, Andres; Minchev, Ivan; Minniti, Dante; Mueller, Eva-Maria; Muller-Sanchez, Francisco; Muna, Demitri; Muñoz, Ricardo R.; Myers, Adam D.; Nair, Preethi; Nandra, Kirpal; Ness, Melissa; Newman, Jeffrey A.; Nichol, Robert C.; Nidever, David L.; Nitschelm, Christian; Noterdaeme, Pasquier; O'Connell, Julia; Oelkers, Ryan James; Oravetz, Audrey; Oravetz, Daniel; Aquino Ortíz, Erik; Osorio, Yeisson; Pace, Zach; Padilla, Nelson; Palanque-Delabrouille, Nathalie; Alonso Palicio, Pedro; Pan, Hsi-An; Pan, Kaike; Parikh, Taniya; Pâris, Isabelle; Park, Changbom; Peirani, Sebastien; Pellejero-Ibanez, Marcos; Penny, Samantha; Percival, Will J.; Perez-Fournon, Ismael; Petitjean, Patrick; Pieri, Matthew M.; Pinsonneault, Marc; Pisani, Alice; Prada, Francisco; Prakash, Abhishek; Queiroz, Anna Bárbara de Andrade; Raddick, M. Jordan; Raichoor, Anand; Barboza Rembold, Sandro; Richstein, Hannah; Riffel, Rogemar A.; Riffel, Rogério; Rix, Hans-Walter; Robin, Annie C.; Rodríguez Torres, Sergio; Román-Zúñiga, Carlos; Ross, Ashley J.; Rossi, Graziano; Ruan, John; Ruggeri, Rossana; Ruiz, Jose; Salvato, Mara; Sánchez, Ariel G.; Sánchez, Sebastián F.; Sanchez Almeida, Jorge; Sánchez-Gallego, José R.; Santana Rojas, Felipe Antonio; Santiago, Basílio Xavier; Schiavon, Ricardo P.; Schimoia, Jaderson S.; Schlafly, Edward; Schlegel, David; Schneider, Donald P.; Schuster, William J.; Schwope, Axel; Seo, Hee-Jong; Serenelli, Aldo; Shen, Shiyin; Shen, Yue; Shetrone, Matthew; Shull, Michael; Silva Aguirre, Víctor; Simon, Joshua D.; Skrutskie, Mike; Slosar, Anze; Smethurst, Rebecca; Smith, Verne; Sobeck, Jennifer; Somers, Garrett; Souter, Barbara J.; Souto, Diogo; Spindler, Ashley; Stark, David V.; Stassun, Keivan; Steinmetz, Matthias; Stello, Dennis; Storchi-Bergmann, Thaisa; Streblyanska, Alina; Stringfellow, Guy S.; Suárez, Genaro; Sun, Jing; Szigeti, Laszlo; Taghizadeh-Popp, Manuchehr; Talbot, Michael S.; Tang, Baitian; Tao, Charling; Tayar, Jamie; Tembe, Mita; Teske, Johanna; Thakar, Aniruddha R.; Thomas, Daniel; Tissera, Patricia; Tojeiro, Rita; Tremonti, Christy; Troup, Nicholas W.; Urry, Meg; Valenzuela, O.; van den Bosch, Remco; Vargas-González, Jaime; Vargas-Magaña, Mariana; Vazquez, Jose Alberto; Villanova, Sandro; Vogt, Nicole; Wake, David; Wang, Yuting; Weaver, Benjamin Alan; Weijmans, Anne-Marie; Weinberg, David H.; Westfall, Kyle B.; Whelan, David G.; Wilcots, Eric; Wild, Vivienne; Williams, Rob A.; Wilson, John; Wood-Vasey, W. M.; Wylezalek, Dominika; Xiao, Ting; Yan, Renbin; Yang, Meng; Ybarra, Jason E.; Yèche, Christophe; Zakamska, Nadia; Zamora, Olga; Zarrouk, Pauline; Zasowski, Gail; Zhang, Kai; Zhao, Cheng; Zhao, Gong-bo; Zheng, Zheng; Zheng, Zheng; Zhou, Zhi-Min; Zhu, Guangtun; Zinn, Joel C.; Zou, Hu
Abstract: The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since 2014 July. This paper describes the second data release from this phase, and the 14th from SDSS overall (making this Data Release Fourteen or DR14). This release makes the data taken by SDSS-IV in its first two years of operation (2014--2016 July) public. Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey; the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data-driven machine-learning algorithm known as ``The Cannon'' and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release (N = 2812 in total). This paper describes the location and format of the publicly available data from the SDSS-IV surveys. We provide references to the important technical papers describing how these data have been taken (both targeting and observation details) and processed for scientific use. The SDSS web site (www.sdss.org) has been updated for this release and provides links to data downloads, as well as tutorials and examples of data use. SDSS-IV is planning to continue to collect astronomical data until 2020 and will be followed by SDSS-V.
The Time-domain Spectroscopic Survey: Target Selection for Repeat SpectroscopyMacLeod, Chelsea L.Green, Paul J.Anderson, Scott F.Eracleous, MichaelRuan, John J.Runnoe, JessieNielsen Brandt, WilliamBadenes, CarlesGreene, JennyMorganson, EricSchmidt, Sarah J.Schwope, AxelShen, YueAmaro, RachaelLebleu, AmyFiliz Ak, NurtenGrier, Catherine J.Hoover, DanielMcGraw, Sean M.Dawson, KyleHall, Patrick B.Hawley, Suzanne L.Mariappan, VivekMyers, Adam D.Pâris, IsabelleSchneider, Donald P.Stassun, Keivan G.Bershady, Matthew A.Blanton, Michael R.Seo, Hee-JongTinker, JeremyFernández-Trincado, J. G.Chambers, KennethKaiser, NickKudritzki, R. -PMagnier, EugeneMetcalfe, NigelWaters, Chris Z.DOI: info:10.3847/1538-3881/aa99dav. 1556
MacLeod, Chelsea L., Green, Paul J., Anderson, Scott F., Eracleous, Michael, Ruan, John J., Runnoe, Jessie, Nielsen Brandt, William, Badenes, Carles, Greene, Jenny, Morganson, Eric, Schmidt, Sarah J., Schwope, Axel, Shen, Yue, Amaro, Rachael, Lebleu, Amy, Filiz Ak, Nurten, Grier, Catherine J., Hoover, Daniel, McGraw, Sean M., Dawson, Kyle, Hall, Patrick B., Hawley, Suzanne L., Mariappan, Vivek, Myers, Adam D., Pâris, Isabelle et al. 2018. "The Time-domain Spectroscopic Survey: Target Selection for Repeat Spectroscopy." The Astronomical Journal 155:6. https://doi.org/10.3847/1538-3881/aa99da
ID: 145776
Type: article
Authors: MacLeod, Chelsea L.; Green, Paul J.; Anderson, Scott F.; Eracleous, Michael; Ruan, John J.; Runnoe, Jessie; Nielsen Brandt, William; Badenes, Carles; Greene, Jenny; Morganson, Eric; Schmidt, Sarah J.; Schwope, Axel; Shen, Yue; Amaro, Rachael; Lebleu, Amy; Filiz Ak, Nurten; Grier, Catherine J.; Hoover, Daniel; McGraw, Sean M.; Dawson, Kyle; Hall, Patrick B.; Hawley, Suzanne L.; Mariappan, Vivek; Myers, Adam D.; Pâris, Isabelle; Schneider, Donald P.; Stassun, Keivan G.; Bershady, Matthew A.; Blanton, Michael R.; Seo, Hee-Jong; Tinker, Jeremy; Fernández-Trincado, J. G.; Chambers, Kenneth; Kaiser, Nick; Kudritzki, R. -P; Magnier, Eugene; Metcalfe, Nigel; Waters, Chris Z.
Abstract: As astronomers increasingly exploit the information available in the time domain, spectroscopic variability in particular opens broad new channels of investigation. Here we describe the selection algorithms for all targets intended for repeat spectroscopy in the Time Domain Spectroscopic Survey (TDSS), part of the extended Baryon Oscillation Spectroscopic Survey within the Sloan Digital Sky Survey (SDSS)-IV. Also discussed are the scientific rationale and technical constraints leading to these target selections. The TDSS includes a large ``repeat quasar spectroscopy'' (RQS) program delivering ~13,000 repeat spectra of confirmed SDSS quasars, and several smaller ``few-epoch spectroscopy'' (FES) programs targeting specific classes of quasars as well as stars. The RQS program aims to provide a large and diverse quasar data set for studying variations in quasar spectra on timescales of years, a comparison sample for the FES quasar programs, and an opportunity for discovering rare, serendipitous events. The FES programs cover a wide variety of phenomena in both quasars and stars. Quasar FES programs target broad absorption line quasars, high signal-to-noise ratio normal broad line quasars, quasars with double-peaked or very asymmetric broad emission line profiles, binary supermassive black hole candidates, and the most photometrically variable quasars. Strongly variable stars are also targeted for repeat spectroscopy, encompassing many types of eclipsing binary systems, and classical pulsators like RR Lyrae. Other stellar FES programs allow spectroscopic variability studies of active ultracool dwarf stars, dwarf carbon stars, and white dwarf/M dwarf spectroscopic binaries. We present example TDSS spectra and describe anticipated sample sizes and results.
Dwarf carbon stars are likely metal-poor binaries and unlikely hosts to carbon planetsWhitehouse, L. J.Farihi, J.Green, P. J.Wilson, T. G.Subasavage, J. P.DOI: info:10.1093/mnras/sty1622v. 4793873–3878
Whitehouse, L. J., Farihi, J., Green, P. J., Wilson, T. G., and Subasavage, J. P. 2018. "Dwarf carbon stars are likely metal-poor binaries and unlikely hosts to carbon planets." Monthly Notices of the Royal Astronomical Society 479:3873– 3878. https://doi.org/10.1093/mnras/sty1622
ID: 149150
Type: article
Authors: Whitehouse, L. J.; Farihi, J.; Green, P. J.; Wilson, T. G.; Subasavage, J. P.
Abstract: Dwarf carbon stars make up the largest fraction of carbon stars in the Galaxy with ≈ 1200 candidates known to date primarily from the Sloan Digital Sky Survey. They either possess primordial carbon-enhancements, or are polluted by mass transfer from an evolved companion such that C/O is enhanced beyond unity. To directly test the binary hypothesis, a radial velocity monitoring survey has been carried out on 28 dwarf carbon stars, resulting in the detection of variations in 21 targets. Using Monte Carlo simulations, this detection fraction is found to be consistent with a 100 per cent binary population and orbital periods on the order of hundreds of days. This result supports the post-mass transfer nature of dwarf carbon stars, and implies they are not likely hosts to carbon planets.
The 13th Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey Mapping Nearby Galaxies at Apache Point ObservatoryAlbareti, Franco D.Allende Prieto, CarlosAlmeida, AndresAnders, FriedrichAnderson, ScottAndrews, Brett H.Aragón-Salamanca, AlfonsoArgudo-Fernández, MariaArmengaud, EricAubourg, EricAvila-Reese, VladimirBadenes, CarlesBailey, StephenBarbuy, BeatrizBarger, KatBarrera-Ballesteros, JorgeBartosz, CurtisBasu, SarbaniBates, DominicBattaglia, GiuseppinaBaumgarten, FalkBaur, JulienBautista, JulianBeers, Timothy C.Belfiore, FrancescoBershady, MatthewBertran de Lis, SaraBird, Jonathan C.Bizyaev, DmitryBlanc, Guillermo A.Blanton, MichaelBlomqvist, MichaelBolton, Adam S.Borissova, J.Bovy, JoNielsen Brandt, WilliamBrinkmann, JonathanBrownstein, Joel R.Bundy, KevinBurtin, EtienneBusca, Nicolás G.Camacho Chavez, Hugo OrlandoCano Díaz, M.Cappellari, MicheleCarrera, RicardoChen, YanpingCherinka, BrianCheung, EdmondChiappini, CristinaChojnowski, DrewChuang, Chia-HsunChung, HaeunCirolini, Rafael FernandoClerc, NicolasCohen, Roger E.Comerford, Julia M.Comparat, JohanCorrea do Nascimento, JanainaCousinou, Marie-ClaudeCovey, KevinCrane, Jeffrey D.Croft, RupertCunha, KatiaDarling, JeremyDavidson, James W., Jr.Dawson, Kyleda Costa, Luizda Silva Ilha, GabrieleDeconto Machado, AliceDelubac, TimothéeDe Lee, Nathande la Macorra, Axelde la Torre, SylvainDiamond-Stanic, Aleksandar M.Donor, JohnDownes, Juan JoseDrory, NivDu, Chengdu Mas des Bourboux, HélionDwelly, TomEbelke, GarrettEigenbrot, ArthurEisenstein, Daniel J.Elsworth, Yvonne P.Emsellem, EricEracleous, MichaelEscoffier, StephanieEvans, Michael L.Falcón-Barroso, JesúsFan, XiaohuiFavole, GinevraFernandez-Alvar, EmmaFernandez-Trincado, J. G.Feuillet, DianeFleming, Scott W.Font-Ribera, AndreuFreischlad, GordonFrinchaboy, PeterFu, HaiGao, YangGarcia, Rafael A.Garcia-Dias, R.Garcia-Hernández, D. A.Garcia Pérez, Ana E.Gaulme, PatrickGe, JunqiangGeisler, DouglasGillespie, BruceGil Marin, HectorGirardi, LéoGoddard, DanielGomez Maqueo Chew, YilenGonzalez-Perez, VioletaGrabowski, KathleenGreen, PaulGrier, Catherine J.Grier, ThomasGuo, HongGuy, JulienHagen, AlexHall, MattHarding, PaulHarley, R. E.Hasselquist, StenHawley, SuzanneHayes, Christian R.Hearty, FredHekker, SaskiaHernandez Toledo, HectorHo, ShirleyHogg, David W.Holley-Bockelmann, KellyHoltzman, Jon A.Holzer, Parker H.Hu, JianHuber, DanielHutchinson, Timothy AlanHwang, Ho SeongIbarra-Medel, Héctor J.Ivans, Inese I.Ivory, KeShawnJaehnig, KurtJensen, Trey W.Johnson, Jennifer A.Jones, AmyJullo, EricKallinger, T.Kinemuchi, KarenKirkby, DavidKlaene, MarkKneib, Jean-PaulKollmeier, Juna A.Lacerna, IvanLane, Richard R.Lang, DustinLaurent, PierreLaw, David R.Leauthaud, AlexieLe Goff, Jean-MarcLi, ChenLi, ChengLi, NiuLi, RanLiang, Fu-HengLiang, YuLima, MarcosLin, LihwaiLin, LinLin, Yen-TingLiu, ChaoLong, DanLucatello, SaraMacDonald, NicholasMacLeod, Chelsea L.Mackereth, J. TedMahadevan, SuvrathGeimba Maia, Marcio AntonioMaiolino, RobertoMajewski, Steven R.Malanushenko, OlenaMalanushenko, ViktorDullius Mallmann, NícolasManchado, ArturoMaraston, ClaudiaMarques-Chaves, RuiMartinez Valpuesta, InmaMasters, Karen L.Mathur, SavitaMcGreer, Ian D.Merloni, AndreaMerrifield, Michael R.Meszáros, SzabolcsMeza, AndresMiglio, AndreaMinchev, IvanMolaverdikhani, KaranMontero-Dorta, Antonio D.Mosser, BenoitMuna, DemitriMyers, AdamNair, PreethiNandra, KirpalNess, MelissaNewman, Jeffrey A.Nichol, Robert C.Nidever, David L.Nitschelm, ChristianO'Connell, JuliaOravetz, AudreyOravetz, Daniel J.Pace, ZacharyPadilla, NelsonPalanque-Delabrouille, NathaliePan, KaikeParejko, JohnParis, IsabellePark, ChangbomPeacock, John A.Peirani, SebastienPellejero-Ibanez, MarcosPenny, SamanthaPercival, Will J.Percival, Jeffrey W.Perez-Fournon, IsmaelPetitjean, PatrickPieri, MatthewPinsonneault, Marc H.Pisani, AlicePrada, FranciscoPrakash, AbhishekPrice-Jones, NatalieRaddick, M. JordanRahman, MubdiRaichoor, AnandBarboza Rembold, SandroReyna, A. M.Rich, JamesRichstein, HannahRidl, JethroRiffel, Rogemar A.Riffel, RogérioRix, Hans-WalterRobin, Annie C.Rockosi, Constance M.Rodríguez-Torres, SergioRodrigues, Thaíse S.Roe, NatalieRoman Lopes, A.Román-Zúñiga, CarlosRoss, Ashley J.Rossi, GrazianoRuan, JohnRuggeri, RossanaRunnoe, Jessie C.Salazar-Albornoz, SalvadorSalvato, MaraSanchez, Sebastian F.Sanchez, Ariel G.Sanchez-Gallego, José R.Santiago, Basílio XavierSchiavon, RicardoSchimoia, Jaderson S.Schlafly, EddieSchlegel, David J.Schneider, Donald P.Schönrich, RalphSchultheis, MathiasSchwope, AxelSeo, Hee-JongSerenelli, AldoSesar, BranimirShao, ZhengyiShetrone, MatthewShull, MichaelSilva Aguirre, VictorSkrutskie, M. F.Slosar, AnžeSmith, MichaelSmith, Verne V.Sobeck, JenniferSomers, GarrettSouto, DiogoStark, David V.Stassun, Keivan G.Steinmetz, MatthiasStello, DennisStorchi Bergmann, ThaisaStrauss, Michael A.Streblyanska, AlinaStringfellow, Guy S.Suarez, GenaroSun, JingTaghizadeh-Popp, ManuchehrTang, BaitianTao, CharlingTayar, JamieTembe, MitaThomas, DanielTinker, JeremyTojeiro, RitaTremonti, ChristyTroup, NicholasTrump, Jonathan R.Unda-Sanzana, EduardoValenzuela, O.van den Bosch, RemcoVargas-Magaña, MarianaVazquez, Jose AlbertoVillanova, SandroVivek, M.Vogt, NicoleWake, DavidWalterbos, ReneWang, YutingWang, EnciWeaver, Benjamin AlanWeijmans, Anne-MarieWeinberg, David H.Westfall, Kyle B.Whelan, David G.Wilcots, EricWild, VivienneWilliams, Rob A.Wilson, JohnWood-Vasey, W. M.Wylezalek, DominikaXiao, TingYan, RenbinYang, MengYbarra, Jason E.Yeche, ChristopheYuan, Fang-TingZakamska, NadiaZamora, OlgaZasowski, GailZhang, KaiZhao, ChengZhao, Gong-boZheng, ZhengZhou, Zhi-MinZhu, GuangtunZinn, Joel C.Zou, HuDOI: info:10.3847/1538-4365/aa8992v. 23325
Albareti, Franco D., Allende Prieto, Carlos, Almeida, Andres, Anders, Friedrich, Anderson, Scott, Andrews, Brett H., Aragón-Salamanca, Alfonso, Argudo-Fernández, Maria, Armengaud, Eric, Aubourg, Eric, Avila-Reese, Vladimir, Badenes, Carles, Bailey, Stephen, Barbuy, Beatriz, Barger, Kat, Barrera-Ballesteros, Jorge, Bartosz, Curtis, Basu, Sarbani, Bates, Dominic, Battaglia, Giuseppina, Baumgarten, Falk, Baur, Julien, Bautista, Julian, Beers, Timothy C., Belfiore, Francesco et al. 2017. "The 13th Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey Mapping Nearby Galaxies at Apache Point Observatory." The Astrophysical Journal Supplement Series 233:25. https://doi.org/10.3847/1538-4365/aa8992
ID: 145639
Type: article
Authors: Albareti, Franco D.; Allende Prieto, Carlos; Almeida, Andres; Anders, Friedrich; Anderson, Scott; Andrews, Brett H.; Aragón-Salamanca, Alfonso; Argudo-Fernández, Maria; Armengaud, Eric; Aubourg, Eric; Avila-Reese, Vladimir; Badenes, Carles; Bailey, Stephen; Barbuy, Beatriz; Barger, Kat; Barrera-Ballesteros, Jorge; Bartosz, Curtis; Basu, Sarbani; Bates, Dominic; Battaglia, Giuseppina; Baumgarten, Falk; Baur, Julien; Bautista, Julian; Beers, Timothy C.; Belfiore, Francesco; Bershady, Matthew; Bertran de Lis, Sara; Bird, Jonathan C.; Bizyaev, Dmitry; Blanc, Guillermo A.; Blanton, Michael; Blomqvist, Michael; Bolton, Adam S.; Borissova, J.; Bovy, Jo; Nielsen Brandt, William; Brinkmann, Jonathan; Brownstein, Joel R.; Bundy, Kevin; Burtin, Etienne; Busca, Nicolás G.; Camacho Chavez, Hugo Orlando; Cano Díaz, M.; Cappellari, Michele; Carrera, Ricardo; Chen, Yanping; Cherinka, Brian; Cheung, Edmond; Chiappini, Cristina; Chojnowski, Drew; Chuang, Chia-Hsun; Chung, Haeun; Cirolini, Rafael Fernando; Clerc, Nicolas; Cohen, Roger E.; Comerford, Julia M.; Comparat, Johan; Correa do Nascimento, Janaina; Cousinou, Marie-Claude; Covey, Kevin; Crane, Jeffrey D.; Croft, Rupert; Cunha, Katia; Darling, Jeremy; Davidson, James W., Jr.; Dawson, Kyle; da Costa, Luiz; da Silva Ilha, Gabriele; Deconto Machado, Alice; Delubac, Timothée; De Lee, Nathan; de la Macorra, Axel; de la Torre, Sylvain; Diamond-Stanic, Aleksandar M.; Donor, John; Downes, Juan Jose; Drory, Niv; Du, Cheng; du Mas des Bourboux, Hélion; Dwelly, Tom; Ebelke, Garrett; Eigenbrot, Arthur; Eisenstein, Daniel J.; Elsworth, Yvonne P.; Emsellem, Eric; Eracleous, Michael; Escoffier, Stephanie; Evans, Michael L.; Falcón-Barroso, Jesús; Fan, Xiaohui; Favole, Ginevra; Fernandez-Alvar, Emma; Fernandez-Trincado, J. G.; Feuillet, Diane; Fleming, Scott W.; Font-Ribera, Andreu; Freischlad, Gordon; Frinchaboy, Peter; Fu, Hai; Gao, Yang; Garcia, Rafael A.; Garcia-Dias, R.; Garcia-Hernández, D. A.; Garcia Pérez, Ana E.; Gaulme, Patrick; Ge, Junqiang; Geisler, Douglas; Gillespie, Bruce; Gil Marin, Hector; Girardi, Léo; Goddard, Daniel; Gomez Maqueo Chew, Yilen; Gonzalez-Perez, Violeta; Grabowski, Kathleen; Green, Paul; Grier, Catherine J.; Grier, Thomas; Guo, Hong; Guy, Julien; Hagen, Alex; Hall, Matt; Harding, Paul; Harley, R. E.; Hasselquist, Sten; Hawley, Suzanne; Hayes, Christian R.; Hearty, Fred; Hekker, Saskia; Hernandez Toledo, Hector; Ho, Shirley; Hogg, David W.; Holley-Bockelmann, Kelly; Holtzman, Jon A.; Holzer, Parker H.; Hu, Jian; Huber, Daniel; Hutchinson, Timothy Alan; Hwang, Ho Seong; Ibarra-Medel, Héctor J.; Ivans, Inese I.; Ivory, KeShawn; Jaehnig, Kurt; Jensen, Trey W.; Johnson, Jennifer A.; Jones, Amy; Jullo, Eric; Kallinger, T.; Kinemuchi, Karen; Kirkby, David; Klaene, Mark; Kneib, Jean-Paul; Kollmeier, Juna A.; Lacerna, Ivan; Lane, Richard R.; Lang, Dustin; Laurent, Pierre; Law, David R.; Leauthaud, Alexie; Le Goff, Jean-Marc; Li, Chen; Li, Cheng; Li, Niu; Li, Ran; Liang, Fu-Heng; Liang, Yu; Lima, Marcos; Lin, Lihwai; Lin, Lin; Lin, Yen-Ting; Liu, Chao; Long, Dan; Lucatello, Sara; MacDonald, Nicholas; MacLeod, Chelsea L.; Mackereth, J. Ted; Mahadevan, Suvrath; Geimba Maia, Marcio Antonio; Maiolino, Roberto; Majewski, Steven R.; Malanushenko, Olena; Malanushenko, Viktor; Dullius Mallmann, Nícolas; Manchado, Arturo; Maraston, Claudia; Marques-Chaves, Rui; Martinez Valpuesta, Inma; Masters, Karen L.; Mathur, Savita; McGreer, Ian D.; Merloni, Andrea; Merrifield, Michael R.; Meszáros, Szabolcs; Meza, Andres; Miglio, Andrea; Minchev, Ivan; Molaverdikhani, Karan; Montero-Dorta, Antonio D.; Mosser, Benoit; Muna, Demitri; Myers, Adam; Nair, Preethi; Nandra, Kirpal; Ness, Melissa; Newman, Jeffrey A.; Nichol, Robert C.; Nidever, David L.; Nitschelm, Christian; O'Connell, Julia; Oravetz, Audrey; Oravetz, Daniel J.; Pace, Zachary; Padilla, Nelson; Palanque-Delabrouille, Nathalie; Pan, Kaike; Parejko, John; Paris, Isabelle; Park, Changbom; Peacock, John A.; Peirani, Sebastien; Pellejero-Ibanez, Marcos; Penny, Samantha; Percival, Will J.; Percival, Jeffrey W.; Perez-Fournon, Ismael; Petitjean, Patrick; Pieri, Matthew; Pinsonneault, Marc H.; Pisani, Alice; Prada, Francisco; Prakash, Abhishek; Price-Jones, Natalie; Raddick, M. Jordan; Rahman, Mubdi; Raichoor, Anand; Barboza Rembold, Sandro; Reyna, A. M.; Rich, James; Richstein, Hannah; Ridl, Jethro; Riffel, Rogemar A.; Riffel, Rogério; Rix, Hans-Walter; Robin, Annie C.; Rockosi, Constance M.; Rodríguez-Torres, Sergio; Rodrigues, Thaíse S.; Roe, Natalie; Roman Lopes, A.; Román-Zúñiga, Carlos; Ross, Ashley J.; Rossi, Graziano; Ruan, John; Ruggeri, Rossana; Runnoe, Jessie C.; Salazar-Albornoz, Salvador; Salvato, Mara; Sanchez, Sebastian F.; Sanchez, Ariel G.; Sanchez-Gallego, José R.; Santiago, Basílio Xavier; Schiavon, Ricardo; Schimoia, Jaderson S.; Schlafly, Eddie; Schlegel, David J.; Schneider, Donald P.; Schönrich, Ralph; Schultheis, Mathias; Schwope, Axel; Seo, Hee-Jong; Serenelli, Aldo; Sesar, Branimir; Shao, Zhengyi; Shetrone, Matthew; Shull, Michael; Silva Aguirre, Victor; Skrutskie, M. F.; Slosar, Anže; Smith, Michael; Smith, Verne V.; Sobeck, Jennifer; Somers, Garrett; Souto, Diogo; Stark, David V.; Stassun, Keivan G.; Steinmetz, Matthias; Stello, Dennis; Storchi Bergmann, Thaisa; Strauss, Michael A.; Streblyanska, Alina; Stringfellow, Guy S.; Suarez, Genaro; Sun, Jing; Taghizadeh-Popp, Manuchehr; Tang, Baitian; Tao, Charling; Tayar, Jamie; Tembe, Mita; Thomas, Daniel; Tinker, Jeremy; Tojeiro, Rita; Tremonti, Christy; Troup, Nicholas; Trump, Jonathan R.; Unda-Sanzana, Eduardo; Valenzuela, O.; van den Bosch, Remco; Vargas-Magaña, Mariana; Vazquez, Jose Alberto; Villanova, Sandro; Vivek, M.; Vogt, Nicole; Wake, David; Walterbos, Rene; Wang, Yuting; Wang, Enci; Weaver, Benjamin Alan; Weijmans, Anne-Marie; Weinberg, David H.; Westfall, Kyle B.; Whelan, David G.; Wilcots, Eric; Wild, Vivienne; Williams, Rob A.; Wilson, John; Wood-Vasey, W. M.; Wylezalek, Dominika; Xiao, Ting; Yan, Renbin; Yang, Meng; Ybarra, Jason E.; Yeche, Christophe; Yuan, Fang-Ting; Zakamska, Nadia; Zamora, Olga; Zasowski, Gail; Zhang, Kai; Zhao, Cheng; Zhao, Gong-bo; Zheng, Zheng; Zheng, Zheng; Zhou, Zhi-Min; Zhu, Guangtun; Zinn, Joel C.; Zou, Hu
Abstract: The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began observations in 2014 July. It pursues three core programs: the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2), Mapping Nearby Galaxies at APO (MaNGA), and the Extended Baryon Oscillation Spectroscopic Survey (eBOSS). As well as its core program, eBOSS contains two major subprograms: the Time Domain Spectroscopic Survey (TDSS) and the SPectroscopic IDentification of ERosita Sources (SPIDERS). This paper describes the first data release from SDSS-IV, Data Release 13 (DR13). DR13 makes publicly available the first 1390 spatially resolved integral field unit observations of nearby galaxies from MaNGA. It includes new observations from eBOSS, completing the Sloan Extended QUasar, Emission-line galaxy, Luminous red galaxy Survey (SEQUELS), which also targeted variability-selected objects and X-ray-selected objects. DR13 includes new reductions of the SDSS-III BOSS data, improving the spectrophotometric calibration and redshift classification, and new reductions of the SDSS-III APOGEE-1 data, improving stellar parameters for dwarf stars and cooler stars. DR13 provides more robust and precise photometric calibrations. Value-added target catalogs relevant for eBOSS, TDSS, and SPIDERS and an updated red-clump catalog for APOGEE are also available. This paper describes the location and format of the data and provides references to important technical papers. The SDSS web site, http://www.sdss.org, provides links to the data, tutorials, examples of data access, and extensive documentation of the reduction and analysis procedures. DR13 is the first of a scheduled set that will contain new data and analyses from the planned ∼6 yr operations of SDSS-IV.
Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant UniverseBlanton, Michael R.Bershady, Matthew A.Abolfathi, BelaAlbareti, Franco D.Allende Prieto, CarlosAlmeida, AndresAlonso-García, JavierAnders, FriedrichAnderson, Scott F.Andrews, BrettAquino-Ortíz, ErikAragón-Salamanca, AlfonsoArgudo-Fernández, MariaArmengaud, EricAubourg, EricAvila-Reese, VladimirBadenes, CarlesBailey, StephenBarger, Kathleen A.Barrera-Ballesteros, JorgeBartosz, CurtisBates, DominicBaumgarten, FalkBautista, JulianBeaton, RachaelBeers, Timothy C.Belfiore, FrancescoBender, Chad F.Berlind, Andreas A.Bernardi, MariangelaBeutler, FlorianBird, Jonathan C.Bizyaev, DmitryBlanc, Guillermo A.Blomqvist, MichaelBolton, Adam S.Boquien, MédéricBorissova, Juravan den Bosch, RemcoBovy, JoBrandt, William N.Brinkmann, JonathanBrownstein, Joel R.Bundy, KevinBurgasser, Adam J.Burtin, EtienneBusca, Nicolás G.Cappellari, MicheleDelgado Carigi, Maria LeticiaCarlberg, Joleen K.Carnero Rosell, AurelioCarrera, RicardoChanover, Nancy J.Cherinka, BrianCheung, EdmondGómez Maqueo Chew, YilenChiappini, CristinaDoohyun Choi, PeterChojnowski, DrewChuang, Chia-HsunChung, HaeunCirolini, Rafael FernandoClerc, NicolasCohen, Roger E.Comparat, Johanda Costa, LuizCousinou, Marie-ClaudeCovey, KevinCrane, Jeffrey D.Croft, Rupert A. C.Cruz-Gonzalez, IreneGarrido Cuadra, DanielCunha, KatiaDamke, Guillermo J.Darling, JeremyDavies, RogerDawson, Kylede la Macorra, AxelDell'Agli, FlaviaDe Lee, NathanDelubac, TimothéeDi Mille, FrancescoDiamond-Stanic, AleksCano-Díaz, MarianaDonor, JohnJosé Downes, JuanDrory, Nivdu Mas des Bourboux, HélionDuckworth, Christopher J.Dwelly, TomDyer, JamieEbelke, GarrettEigenbrot, Arthur D.Eisenstein, Daniel J.Emsellem, EricEracleous, MikeEscoffier, StephanieEvans, Michael L.Fan, XiaohuiFernández-Alvar, EmmaFernandez-Trincado, J. G.Feuillet, Diane K.Finoguenov, AlexisFleming, Scott W.Font-Ribera, AndreuFredrickson, AlexanderFreischlad, GordonFrinchaboy, Peter M.Fuentes, Carla E.Galbany, LluísGarcia-Dias, R.García-Hernández, D. A.Gaulme, PatrickGeisler, DougGelfand, Joseph D.Gil-Marín, HéctorGillespie, Bruce A.Goddard, DanielGonzalez-Perez, VioletaGrabowski, KathleenGreen, Paul J.Grier, Catherine J.Gunn, James E.Guo, HongGuy, JulienHagen, AlexHahn, ChangHoonHall, MatthewHarding, PaulHasselquist, StenHawley, Suzanne L.Hearty, FredGonzalez Hernández, Jonay I.Ho, ShirleyHogg, David W.Holley-Bockelmann, KellyHoltzman, Jon A.Holzer, Parker H.Huehnerhoff, JosephHutchinson, Timothy A.Hwang, Ho SeongIbarra-Medel, Héctor J.da Silva Ilha, GabrieleIvans, Inese I.Ivory, KeShawnJackson, KellyJensen, Trey W.Johnson, Jennifer A.Jones, AmyJönsson, HenrikJullo, EricKamble, VikrantKinemuchi, KarenKirkby, DavidKitaura, Francisco-ShuKlaene, MarkKnapp, Gillian R.Kneib, Jean-PaulKollmeier, Juna A.Lacerna, IvanLane, Richard R.Lang, DustinLaw, David R.Lazarz, DanielLee, YoungbaeLe Goff, Jean-MarcLiang, Fu-HengLi, ChengLi, HongyuLian, JianhuiLima, MarcosLin, LihwaiLin, Yen-TingBertran de Lis, SaraLiu, Chaode Icaza Lizaola,Miguel Angel C.Long, DanLucatello, SaraLundgren, BrittMacDonald, Nicholas K.Deconto Machado, AliceMacLeod, Chelsea L.Mahadevan, SuvrathGeimba Maia, Marcio AntonioMaiolino, RobertoMajewski, Steven R.Malanushenko, ElenaMalanushenko, ViktorManchado, ArturoMao, ShudeMaraston, ClaudiaMarques-Chaves, RuiMasseron, ThomasMasters, Karen L.McBride, Cameron K.McDermid, Richard M.McGrath, BrianneMcGreer, Ian D.Medina Peña, NicolásMelendez, MatthewMerloni, AndreaMerrifield, Michael R.Meszaros, SzabolcsMeza, AndresMinchev, IvanMinniti, DanteMiyaji, TakamitsuMore, SurhudMulchaey, JohnMüller-Sánchez, FranciscoMuna, DemitriMunoz, Ricardo R.Myers, Adam D.Nair, PreethiNandra, KirpalCorrea do Nascimento, JanainaNegrete, AlenkaNess, MelissaNewman, Jeffrey A.Nichol, Robert C.Nidever, David L.Nitschelm, ChristianNtelis, PierrosO'Connell, Julia E.Oelkers, Ryan J.Oravetz, AudreyOravetz, DanielPace, ZachPadilla, NelsonPalanque-Delabrouille, NathalieAlonso Palicio, PedroPan, KaikeParejko, John K.Parikh, TaniyaPâris, IsabellePark, ChangbomPatten, Alim Y.Peirani, SebastienPellejero-Ibanez, MarcosPenny, SamanthaPercival, Will J.Perez-Fournon, IsmaelPetitjean, PatrickPieri, Matthew M.Pinsonneault, MarcPisani, AlicePoleski, RadosławPrada, FranciscoPrakash, AbhishekQueiroz, Anna Bárbara de AndradeRaddick, M. JordanRaichoor, AnandBarboza Rembold, SandroRichstein, HannahRiffel, Rogemar A.Riffel, RogérioRix, Hans-WalterRobin, Annie C.Rockosi, Constance M.Rodríguez-Torres, SergioRoman-Lopes, A.Román-Zúñiga, CarlosRosado, MargaritaRoss, Ashley J.Rossi, GrazianoRuan, JohnRuggeri, RossanaRykoff, Eli S.Salazar-Albornoz, SalvadorSalvato, MaraSánchez, Ariel G.Aguado, D. S.Sánchez-Gallego, José R.Santana, Felipe A.Santiago, Basílio XavierSayres, ConorSchiavon, Ricardo P.da Silva Schimoia, JadersonSchlafly, Edward F.Schlegel, David J.Schneider, Donald P.Schultheis, MathiasSchuster, William J.Schwope, AxelSeo, Hee-JongShao, ZhengyiShen, ShiyinShetrone, MatthewShull, MichaelSimon, Joshua D.Skinner, DanielleSkrutskie, M. F.Slosar, AnžeSmith, Verne V.Sobeck, Jennifer S.Sobreira, FlaviaSomers, GarrettSouto, DiogoStark, David V.Stassun, KeivanStauffer, FritzSteinmetz, MatthiasStorchi-Bergmann, ThaisaStreblyanska, AlinaStringfellow, Guy S.Suárez, GenaroSun, JingSuzuki, NaoSzigeti, LaszloTaghizadeh-Popp, ManuchehrTang, BaitianTao, CharlingTayar, JamieTembe, MitaTeske, JohannaThakar, Aniruddha R.Thomas, DanielThompson, Benjamin A.Tinker, Jeremy L.Tissera, PatriciaTojeiro, RitaHernandez Toledo, Hectorde la Torre, SylvainTremonti, ChristyTroup, Nicholas W.Valenzuela, OctavioMartinez Valpuesta, InmaVargas-González, JaimeVargas-Magaña, MarianaVazquez, Jose AlbertoVillanova, SandroVivek, M.Vogt, NicoleWake, DavidWalterbos, ReneWang, YutingWeaver, Benjamin AlanWeijmans, Anne-MarieWeinberg, David H.Westfall, Kyle B.Whelan, David G.Wild, VivienneWilson, JohnWood-Vasey, W. M.Wylezalek, DominikaXiao, TingYan, RenbinYang, MengYbarra, Jason E.Yèche, ChristopheZakamska, NadiaZamora, OlgaZarrouk, PaulineZasowski, GailZhang, KaiZhao, Gong-boZheng, ZhengZhou, XuZhou, Zhi-MinZhu, Guangtun B.Zoccali, ManuelaZou, HuDOI: info:10.3847/1538-3881/aa7567v. 15428
Blanton, Michael R., Bershady, Matthew A., Abolfathi, Bela, Albareti, Franco D., Allende Prieto, Carlos, Almeida, Andres, Alonso-García, Javier, Anders, Friedrich, Anderson, Scott F., Andrews, Brett, Aquino-Ortíz, Erik, Aragón-Salamanca, Alfonso, Argudo-Fernández, Maria, Armengaud, Eric, Aubourg, Eric, Avila-Reese, Vladimir, Badenes, Carles, Bailey, Stephen, Barger, Kathleen A., Barrera-Ballesteros, Jorge, Bartosz, Curtis, Bates, Dominic, Baumgarten, Falk, Bautista, Julian, Beaton, Rachael et al. 2017. "Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe." The Astronomical Journal 154:28. https://doi.org/10.3847/1538-3881/aa7567
ID: 143827
Type: article
Authors: Blanton, Michael R.; Bershady, Matthew A.; Abolfathi, Bela; Albareti, Franco D.; Allende Prieto, Carlos; Almeida, Andres; Alonso-García, Javier; Anders, Friedrich; Anderson, Scott F.; Andrews, Brett; Aquino-Ortíz, Erik; Aragón-Salamanca, Alfonso; Argudo-Fernández, Maria; Armengaud, Eric; Aubourg, Eric; Avila-Reese, Vladimir; Badenes, Carles; Bailey, Stephen; Barger, Kathleen A.; Barrera-Ballesteros, Jorge; Bartosz, Curtis; Bates, Dominic; Baumgarten, Falk; Bautista, Julian; Beaton, Rachael; Beers, Timothy C.; Belfiore, Francesco; Bender, Chad F.; Berlind, Andreas A.; Bernardi, Mariangela; Beutler, Florian; Bird, Jonathan C.; Bizyaev, Dmitry; Blanc, Guillermo A.; Blomqvist, Michael; Bolton, Adam S.; Boquien, Médéric; Borissova, Jura; van den Bosch, Remco; Bovy, Jo; Brandt, William N.; Brinkmann, Jonathan; Brownstein, Joel R.; Bundy, Kevin; Burgasser, Adam J.; Burtin, Etienne; Busca, Nicolás G.; Cappellari, Michele; Delgado Carigi, Maria Leticia; Carlberg, Joleen K.; Carnero Rosell, Aurelio; Carrera, Ricardo; Chanover, Nancy J.; Cherinka, Brian; Cheung, Edmond; Gómez Maqueo Chew, Yilen; Chiappini, Cristina; Doohyun Choi, Peter; Chojnowski, Drew; Chuang, Chia-Hsun; Chung, Haeun; Cirolini, Rafael Fernando; Clerc, Nicolas; Cohen, Roger E.; Comparat, Johan; da Costa, Luiz; Cousinou, Marie-Claude; Covey, Kevin; Crane, Jeffrey D.; Croft, Rupert A. C.; Cruz-Gonzalez, Irene; Garrido Cuadra, Daniel; Cunha, Katia; Damke, Guillermo J.; Darling, Jeremy; Davies, Roger; Dawson, Kyle; de la Macorra, Axel; Dell'Agli, Flavia; De Lee, Nathan; Delubac, Timothée; Di Mille, Francesco; Diamond-Stanic, Aleks; Cano-Díaz, Mariana; Donor, John; José Downes, Juan; Drory, Niv; du Mas des Bourboux, Hélion; Duckworth, Christopher J.; Dwelly, Tom; Dyer, Jamie; Ebelke, Garrett; Eigenbrot, Arthur D.; Eisenstein, Daniel J.; Emsellem, Eric; Eracleous, Mike; Escoffier, Stephanie; Evans, Michael L.; Fan, Xiaohui; Fernández-Alvar, Emma; Fernandez-Trincado, J. G.; Feuillet, Diane K.; Finoguenov, Alexis; Fleming, Scott W.; Font-Ribera, Andreu; Fredrickson, Alexander; Freischlad, Gordon; Frinchaboy, Peter M.; Fuentes, Carla E.; Galbany, Lluís; Garcia-Dias, R.; García-Hernández, D. A.; Gaulme, Patrick; Geisler, Doug; Gelfand, Joseph D.; Gil-Marín, Héctor; Gillespie, Bruce A.; Goddard, Daniel; Gonzalez-Perez, Violeta; Grabowski, Kathleen; Green, Paul J.; Grier, Catherine J.; Gunn, James E.; Guo, Hong; Guy, Julien; Hagen, Alex; Hahn, ChangHoon; Hall, Matthew; Harding, Paul; Hasselquist, Sten; Hawley, Suzanne L.; Hearty, Fred; Gonzalez Hernández, Jonay I.; Ho, Shirley; Hogg, David W.; Holley-Bockelmann, Kelly; Holtzman, Jon A.; Holzer, Parker H.; Huehnerhoff, Joseph; Hutchinson, Timothy A.; Hwang, Ho Seong; Ibarra-Medel, Héctor J.; da Silva Ilha, Gabriele; Ivans, Inese I.; Ivory, KeShawn; Jackson, Kelly; Jensen, Trey W.; Johnson, Jennifer A.; Jones, Amy; Jönsson, Henrik; Jullo, Eric; Kamble, Vikrant; Kinemuchi, Karen; Kirkby, David; Kitaura, Francisco-Shu; Klaene, Mark; Knapp, Gillian R.; Kneib, Jean-Paul; Kollmeier, Juna A.; Lacerna, Ivan; Lane, Richard R.; Lang, Dustin; Law, David R.; Lazarz, Daniel; Lee, Youngbae; Le Goff, Jean-Marc; Liang, Fu-Heng; Li, Cheng; Li, Hongyu; Lian, Jianhui; Lima, Marcos; Lin, Lihwai; Lin, Yen-Ting; Bertran de Lis, Sara; Liu, Chao; de Icaza Lizaola,Miguel Angel C.; Long, Dan; Lucatello, Sara; Lundgren, Britt; MacDonald, Nicholas K.; Deconto Machado, Alice; MacLeod, Chelsea L.; Mahadevan, Suvrath; Geimba Maia, Marcio Antonio; Maiolino, Roberto; Majewski, Steven R.; Malanushenko, Elena; Malanushenko, Viktor; Manchado, Arturo; Mao, Shude; Maraston, Claudia; Marques-Chaves, Rui; Masseron, Thomas; Masters, Karen L.; McBride, Cameron K.; McDermid, Richard M.; McGrath, Brianne; McGreer, Ian D.; Medina Peña, Nicolás; Melendez, Matthew; Merloni, Andrea; Merrifield, Michael R.; Meszaros, Szabolcs; Meza, Andres; Minchev, Ivan; Minniti, Dante; Miyaji, Takamitsu; More, Surhud; Mulchaey, John; Müller-Sánchez, Francisco; Muna, Demitri; Munoz, Ricardo R.; Myers, Adam D.; Nair, Preethi; Nandra, Kirpal; Correa do Nascimento, Janaina; Negrete, Alenka; Ness, Melissa; Newman, Jeffrey A.; Nichol, Robert C.; Nidever, David L.; Nitschelm, Christian; Ntelis, Pierros; O'Connell, Julia E.; Oelkers, Ryan J.; Oravetz, Audrey; Oravetz, Daniel; Pace, Zach; Padilla, Nelson; Palanque-Delabrouille, Nathalie; Alonso Palicio, Pedro; Pan, Kaike; Parejko, John K.; Parikh, Taniya; Pâris, Isabelle; Park, Changbom; Patten, Alim Y.; Peirani, Sebastien; Pellejero-Ibanez, Marcos; Penny, Samantha; Percival, Will J.; Perez-Fournon, Ismael; Petitjean, Patrick; Pieri, Matthew M.; Pinsonneault, Marc; Pisani, Alice; Poleski, Radosław; Prada, Francisco; Prakash, Abhishek; Queiroz, Anna Bárbara de Andrade; Raddick, M. Jordan; Raichoor, Anand; Barboza Rembold, Sandro; Richstein, Hannah; Riffel, Rogemar A.; Riffel, Rogério; Rix, Hans-Walter; Robin, Annie C.; Rockosi, Constance M.; Rodríguez-Torres, Sergio; Roman-Lopes, A.; Román-Zúñiga, Carlos; Rosado, Margarita; Ross, Ashley J.; Rossi, Graziano; Ruan, John; Ruggeri, Rossana; Rykoff, Eli S.; Salazar-Albornoz, Salvador; Salvato, Mara; Sánchez, Ariel G.; Aguado, D. S.; Sánchez-Gallego, José R.; Santana, Felipe A.; Santiago, Basílio Xavier; Sayres, Conor; Schiavon, Ricardo P.; da Silva Schimoia, Jaderson; Schlafly, Edward F.; Schlegel, David J.; Schneider, Donald P.; Schultheis, Mathias; Schuster, William J.; Schwope, Axel; Seo, Hee-Jong; Shao, Zhengyi; Shen, Shiyin; Shetrone, Matthew; Shull, Michael; Simon, Joshua D.; Skinner, Danielle; Skrutskie, M. F.; Slosar, Anže; Smith, Verne V.; Sobeck, Jennifer S.; Sobreira, Flavia; Somers, Garrett; Souto, Diogo; Stark, David V.; Stassun, Keivan; Stauffer, Fritz; Steinmetz, Matthias; Storchi-Bergmann, Thaisa; Streblyanska, Alina; Stringfellow, Guy S.; Suárez, Genaro; Sun, Jing; Suzuki, Nao; Szigeti, Laszlo; Taghizadeh-Popp, Manuchehr; Tang, Baitian; Tao, Charling; Tayar, Jamie; Tembe, Mita; Teske, Johanna; Thakar, Aniruddha R.; Thomas, Daniel; Thompson, Benjamin A.; Tinker, Jeremy L.; Tissera, Patricia; Tojeiro, Rita; Hernandez Toledo, Hector; de la Torre, Sylvain; Tremonti, Christy; Troup, Nicholas W.; Valenzuela, Octavio; Martinez Valpuesta, Inma; Vargas-González, Jaime; Vargas-Magaña, Mariana; Vazquez, Jose Alberto; Villanova, Sandro; Vivek, M.; Vogt, Nicole; Wake, David; Walterbos, Rene; Wang, Yuting; Weaver, Benjamin Alan; Weijmans, Anne-Marie; Weinberg, David H.; Westfall, Kyle B.; Whelan, David G.; Wild, Vivienne; Wilson, John; Wood-Vasey, W. M.; Wylezalek, Dominika; Xiao, Ting; Yan, Renbin; Yang, Meng; Ybarra, Jason E.; Yèche, Christophe; Zakamska, Nadia; Zamora, Olga; Zarrouk, Pauline; Zasowski, Gail; Zhang, Kai; Zhao, Gong-bo; Zheng, Zheng; Zheng, Zheng; Zhou, Xu; Zhou, Zhi-Min; Zhu, Guangtun B.; Zoccali, Manuela; Zou, Hu
Abstract: We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands of Milky Way stars at high resolution and high signal-to-noise ratios in the near-infrared. The Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey is obtaining spatially resolved spectroscopy for thousands of nearby galaxies (median z˜ 0.03). The extended Baryon Oscillation Spectroscopic Survey (eBOSS) is mapping the galaxy, quasar, and neutral gas distributions between z˜ 0.6 and 3.5 to constrain cosmology using baryon acoustic oscillations, redshift space distortions, and the shape of the power spectrum. Within eBOSS, we are conducting two major subprograms: the SPectroscopic IDentification of eROSITA Sources (SPIDERS), investigating X-ray AGNs and galaxies in X-ray clusters, and the Time Domain Spectroscopic Survey (TDSS), obtaining spectra of variable sources. All programs use the 2.5 m Sloan Foundation Telescope at the Apache Point Observatory; observations there began in Summer 2014. APOGEE-2 also operates a second near-infrared spectrograph at the 2.5 m du Pont Telescope at Las Campanas Observatory, with observations beginning in early 2017. Observations at both facilities are scheduled to continue through 2020. In keeping with previous SDSS policy, SDSS-IV provides regularly scheduled public data releases; the first one, Data Release 13, was made available in 2016 July.
SPIDERS: selection of spectroscopic targets using AGN candidates detected in all-sky X-ray surveysDwelly, T.Salvato, M.Merloni, A.Brusa, M.Buchner, J.Anderson, S. F.Boller, ThBrandt, W. N.Budavári, T.Clerc, N.Coffey, D.Del Moro, A.Georgakakis, A.Green, P. J.Jin, C.Menzel, M. -LMyers, A. D.Nandra, K.Nichol, R. C.Ridl, J.Schwope, A. D.Simm, T.DOI: info:10.1093/mnras/stx864v. 4691065–1095
Dwelly, T., Salvato, M., Merloni, A., Brusa, M., Buchner, J., Anderson, S. F., Boller, Th, Brandt, W. N., Budavári, T., Clerc, N., Coffey, D., Del Moro, A., Georgakakis, A., Green, P. J., Jin, C., Menzel, M. -L, Myers, A. D., Nandra, K., Nichol, R. C., Ridl, J., Schwope, A. D., and Simm, T. 2017. "SPIDERS: selection of spectroscopic targets using AGN candidates detected in all-sky X-ray surveys." Monthly Notices of the Royal Astronomical Society 469:1065– 1095. https://doi.org/10.1093/mnras/stx864
ID: 143788
Type: article
Authors: Dwelly, T.; Salvato, M.; Merloni, A.; Brusa, M.; Buchner, J.; Anderson, S. F.; Boller, Th; Brandt, W. N.; Budavári, T.; Clerc, N.; Coffey, D.; Del Moro, A.; Georgakakis, A.; Green, P. J.; Jin, C.; Menzel, M. -L; Myers, A. D.; Nandra, K.; Nichol, R. C.; Ridl, J.; Schwope, A. D.; Simm, T.
Abstract: SPIDERS (SPectroscopic IDentification of eROSITA Sources) is a Sloan Digital Sky Survey IV (SDSS-IV) survey running in parallel to the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) cosmology project. SPIDERS will obtain optical spectroscopy for large numbers of X-ray-selected active galactic nuclei (AGN) and galaxy cluster members detected in wide-area eROSITA, XMM-Newton and ROSAT surveys. We describe the methods used to choose spectroscopic targets for two sub-programmes of SPIDERS X-ray selected AGN candidates detected in the ROSAT All Sky and the XMM-Newton Slew surveys. We have exploited a Bayesian cross-matching algorithm, guided by priors based on mid-IR colour-magnitude information from the Wide-field Infrared Survey Explorer survey, to select the most probable optical counterpart to each X-ray detection. We empirically demonstrate the high fidelity of our counterpart selection method using a reference sample of bright well-localized X-ray sources collated from XMM-Newton, Chandra and Swift-XRT serendipitous catalogues, and also by examining blank-sky locations. We describe the down-selection steps which resulted in the final set of SPIDERS-AGN targets put forward for spectroscopy within the eBOSS/TDSS/SPIDERS survey, and present catalogues of these targets. We also present catalogues of ˜12 000 ROSAT and ˜1500 XMM-Newton Slew survey sources that have existing optical spectroscopy from SDSS-DR12, including the results of our visual inspections. On completion of the SPIDERS programme, we expect to have collected homogeneous spectroscopic redshift information over a footprint of ˜7500 deg2 for >85 per cent of the ROSAT and XMM-Newton Slew survey sources having optical counterparts in the magnitude range 17 < r < 22.5, producing a large and highly complete sample of bright X-ray-selected AGN suitable for statistical studies of AGN evolution and clustering.