The Broadband X-Ray Spectrum of the X-Ray-obscured Type 1 AGN 2MASX J193013.80+341049.5

The Broadband X-Ray Spectrum of the X-Ray-obscured Type 1 AGN 2MASX J193013.80+341049.5Kamraj, NikitaBaloković, MislavBrightman, MurrayStern, DanielHarrison, Fiona A.Assef, Roberto J.Koss, Michael J.Oh, KyuseokWalton, Dominic J.DOI: info:10.3847/1538-4357/ab57fcv. 887255
Kamraj, Nikita, Baloković, Mislav, Brightman, Murray, Stern, Daniel, Harrison, Fiona A., Assef, Roberto J., Koss, Michael J., Oh, Kyuseok, and Walton, Dominic J. 2019. "The Broadband X-Ray Spectrum of the X-Ray-obscured Type 1 AGN 2MASX J193013.80+341049.5." The Astrophysical Journal 887:255. https://doi.org/10.3847/1538-4357/ab57fc
ID: 154526
Type: article
Authors: Kamraj, Nikita; Baloković, Mislav; Brightman, Murray; Stern, Daniel; Harrison, Fiona A.; Assef, Roberto J.; Koss, Michael J.; Oh, Kyuseok; Walton, Dominic J.
Abstract: We present results from modeling the broadband X-ray spectrum of the Type 1 active galactic nucleus (AGN) 2MASX J193013.80+341049.5 using NuSTAR, Swift, and archival XMM-Newton observations. We find this source to be highly X-ray obscured, with column densities exceeding 1023 cm−2 across all epochs of X-ray observations, spanning an 8 yr period. However, the source exhibits prominent broad optical emission lines, consistent with an unobscured Type 1 AGN classification. We fit the X-ray spectra with both phenomenological reflection models and physically motivated torus models to model the X-ray absorption. We examine the spectral energy distribution of this source and investigate some possible scenarios to explain the mismatch between X-ray and optical classifications. We compare the ratio of reddening to X-ray absorbing column density ({E}B-V/{N}{{H}}) and find that 2MASX J193013.80+341049.5 likely has a much lower dust-to-gas ratio relative to the Galactic interstellar medium, suggesting that the broad line region itself could provide the source of extra X-ray obscuration, being composed of low-ionization, dust-free gas.