BASS. XXIV. The BASS DR2 Spectroscopic Line Measurements and AGN Demographics

Oh, Kyuseok; Koss, Michael J.; Ueda, Yoshihiro; Stern, Daniel; Ricci, Claudio; Trakhtenbrot, Benny; Powell, Meredith C.; den Brok, Jakob S.; Lamperti, Isabella; Mushotzky, Richard; Ricci, Federica; Bär, Rudolf E.; Rojas, Alejandra F.; Ichikawa, Kohei; Riffel, Rogério; Treister, Ezequiel; Harrison, Fiona; Urry, C. Megan; Bauer, Franz E.; Schawinski, Kevin

doi:10.3847/1538-4365/ac5b68

BASS. XXIV. The BASS DR2 Spectroscopic Line Measurements and AGN Demographics

Journal Article · Fri Jul 15 00:00:00 EDT 2022 · The Astrophysical Journal. Supplement Series

DOI:https://doi.org/10.3847/1538-4365/ac5b68· OSTI ID:1983307

^[1]; ^[2]; ^[3]; ^[4]; ^[5]; ^[6]; ^[7]; ^[8]; ^[9]; ^[10]; ^[11]; ^[12]; ^[13]; ^[14]; ^[15]; ^[16]; Harrison, Fiona ^[4]; ^[17]; ^[18]; ^[19]

Korea Astronomy and Space Science Institute, Daejeon (Korea, Republic of); Kyoto University (Japan)
Eureka Scientific, Oakland, CA (United States); Space Science Institute, Boulder, CO (United States)
Kyoto University (Japan)
California Institute of Technology (CalTech), Pasadena, CA (United States)
Universidad Diego Portales, Santiago (Chile); Peking University, Beijing (China)
Tel Aviv University (Israel)
Stanford University, CA (United States)
ETH Zürich (Switzerland); Argelander Institute for Astronomy, Bonn (Germany)
Centro de Astrobiología (CAB, CSIC2013INTA), Madrid (Spain)
University of Maryland, College Park, MD (United States)
Università di Bologna (Italy); INAF—Osservatorio di Astrofisica e Scienza dello Spazio di Bologna (Italy)
ETH Zürich (Switzerland)
Universidad de Antofagasta (Chile)
Tohoku University, Sendai (Japan); Max-Planck-Institut für extraterrestrische Physik (MPE), Garching bei Müunchen (Germany)
Universidade Federal do Rio Grande do Sul (Brazil)
Pontificia Universidad Católica de Chile, Santiago (Chile)
Yale University, New Haven, CT (United States)
Space Science Institute, Boulder, CO (United States); Pontificia Universidad Católica de Chile, Santiago (Chile); Millennium Institute of Astrophysics (MAS), Santiago (Chile)
Modulos AG, Zurich (Switzerland)

We present the second catalog and data release of optical spectral line measurements and active galactic nucleus (AGN) demographics of the BAT AGN Spectroscopic Survey, which focuses on the Swift-BAT hard X-ray detected AGNs. We use spectra from dedicated campaigns and publicly available archives to investigate spectral properties of most of the AGNs listed in the 70 month Swift-BAT all-sky catalog; specifically, 743 of the 746 unbeamed and unlensed AGNs (99.6%). We find a good correspondence between the optical emission line widths and the hydrogen column density distributions using the X-ray spectra, with a clear dichotomy of AGN types for N_H = 10²² cm^–2. Based on optical emission-line diagnostics, we show that 48%–75% of BAT AGNs are classified as Seyfert, depending on the choice of emission lines used in the diagnostics. The fraction of objects with upper limits on line emission varies from 6% to 20%. Roughly 4% of the BAT AGNs have lines too weak to be placed on the most commonly used diagnostic diagram, [O _iii]λ5007/Hβ versus [N _ii]λ6584/Hα, despite the high signal-to-noise ratio of their spectra. This value increases to 35% in the [O _iii]λ5007/[O _ii]λ3727 diagram, owing to difficulties in line detection. Compared to optically selected narrow-line AGNs in the Sloan Digital Sky Survey, the BAT narrow-line AGNs have a higher rate of reddening/extinction, with Hα/Hβ > 5 (~36%), indicating that hard X-ray selection more effectively detects obscured AGNs from the underlying AGN population. Finally, we present a subpopulation of AGNs that feature complex broad lines (34%, 250/743) or double-peaked narrow emission lines (2%, 17/743).

View Accepted Manuscript (DOE)

Research Organization:: US Department of Energy (USDOE), Washington, DC (United States). Office of Science, Sloan Digital Sky Survey (SDSS)

Sponsoring Organization:: USDOE

OSTI ID:: 1983307

Journal Information:: The Astrophysical Journal. Supplement Series, Journal Name: The Astrophysical Journal. Supplement Series Journal Issue: 1 Vol. 261; ISSN 0067-0049

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Strongly star forming galaxies in the local Universe with nebular He ii λ4686 emission: Galaxies with nebular He ii 4686 emission Shirazi, Maryam; Brinchmann, Jarle Monthly Notices of the Royal Astronomical Society, Vol. 421, Issue 2 https://doi.org/10.1111/j.1365-2966.2012.20439.x	journal	February 2012
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Obscured Active Galactic Nuclei Hickox, Ryan C.; Alexander, David M. Annual Review of Astronomy and Astrophysics, Vol. 56, Issue 1 https://doi.org/10.1146/annurev-astro-081817-051803	journal	September 2018
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A NEW POPULATION OF COMPTON-THICK AGNs IDENTIFIED USING THE SPECTRAL CURVATURE ABOVE 10 keV Koss, Michael J.; Assef, R.; Baloković, M. The Astrophysical Journal, Vol. 825, Issue 2 https://doi.org/10.3847/0004-637X/825/2/85	journal	July 2016
MULTI-EPOCH SPECTROSCOPY OF DWARF GALAXIES WITH AGN SIGNATURES: IDENTIFYING SOURCES WITH PERSISTENT BROAD H α EMISSION Baldassare, Vivienne F.; Reines, Amy E.; Gallo, Elena The Astrophysical Journal, Vol. 829, Issue 1 https://doi.org/10.3847/0004-637X/829/1/57	journal	September 2016
The NuSTAR Serendipitous Survey: The 40-month Catalog and the Properties of the Distant High-energy X-Ray Source Population Lansbury, G. B.; Stern, D.; Aird, J. The Astrophysical Journal, Vol. 836, Issue 1 https://doi.org/10.3847/1538-4357/836/1/99	journal	February 2017
BAT AGN Spectroscopic Survey. I. Spectral Measurements, Derived Quantities, and AGN Demographics Koss, Michael; Trakhtenbrot, Benny; Ricci, Claudio The Astrophysical Journal, Vol. 850, Issue 1 https://doi.org/10.3847/1538-4357/aa8ec9	journal	November 2017
An Observational Link between AGN Eddington Ratio and [N ii] λ 6583/H α at 0.6 < z < 1.7 Oh, Kyuseok; Ueda, Yoshihiro; Akiyama, Masayuki The Astrophysical Journal, Vol. 880, Issue 2 https://doi.org/10.3847/1538-4357/ab288b	journal	July 2019
BAT AGN Spectroscopic Survey. XVI. General Physical Characteristics of BAT Blazars Paliya, Vaidehi S.; Koss, M.; Trakhtenbrot, B. The Astrophysical Journal, Vol. 881, Issue 2 https://doi.org/10.3847/1538-4357/ab2f8b	journal	August 2019
No Significant Evolution of Relations between Black Hole Mass and Galaxy Total Stellar Mass Up to z ∼ 2.5 Suh, Hyewon; Civano, Francesca; Trakhtenbrot, Benny The Astrophysical Journal, Vol. 889, Issue 1 https://doi.org/10.3847/1538-4357/ab5f5f	journal	January 2020
Systematic Study of AGN Clumpy Tori with Broadband X-Ray Spectroscopy: Updated Unified Picture of AGN Structure Ogawa, Shoji; Ueda, Yoshihiro; Tanimoto, Atsushi The Astrophysical Journal, Vol. 906, Issue 2 https://doi.org/10.3847/1538-4357/abccce	journal	January 2021
BAT AGN Spectroscopic Survey. V. X-Ray Properties of the Swift /BAT 70-month AGN Catalog Ricci, C.; Trakhtenbrot, B.; Koss, M. J. The Astrophysical Journal Supplement Series, Vol. 233, Issue 2 https://doi.org/10.3847/1538-4365/aa96ad	journal	December 2017
The 105-Month Swift -BAT All-sky Hard X-Ray Survey Oh, Kyuseok; Koss, Michael; Markwardt, Craig B. The Astrophysical Journal Supplement Series, Vol. 235, Issue 1 https://doi.org/10.3847/1538-4365/aaa7fd	journal	March 2018
The Fifteenth Data Release of the Sloan Digital Sky Surveys: First Release of MaNGA-derived Quantities, Data Visualization Tools, and Stellar Library Aguado, D. S.; Ahumada, Romina; Almeida, Andrés The Astrophysical Journal Supplement Series, Vol. 240, Issue 2 https://doi.org/10.3847/1538-4365/aaf651	journal	January 2019
BASS. XXVIII. Near-infrared Data Release 2: High-ionization and Broad Lines in Active Galactic Nuclei* den Brok, Jakob S.; Koss, Michael J.; Trakhtenbrot, Benny The Astrophysical Journal Supplement Series, Vol. 261, Issue 1 https://doi.org/10.3847/1538-4365/ac5b66	journal	July 2022
BASS. XXIX. The Near-infrared View of the Broad-line Region (BLR): The Effects of Obscuration in BLR Characterization* Ricci, Federica; Treister, Ezequiel; Bauer, Franz E. The Astrophysical Journal Supplement Series, Vol. 261, Issue 1 https://doi.org/10.3847/1538-4365/ac5b67	journal	July 2022
BASS. XXVI. DR2 Host Galaxy Stellar Velocity Dispersions Koss, Michael J.; Trakhtenbrot, Benny; Ricci, Claudio The Astrophysical Journal Supplement Series, Vol. 261, Issue 1 https://doi.org/10.3847/1538-4365/ac650b	journal	July 2022
BASS. XXV. DR2 Broad-line-based Black Hole Mass Estimates and Biases from Obscuration Mejía-Restrepo, Julian E.; Trakhtenbrot, Benny; Koss, Michael J. The Astrophysical Journal Supplement Series, Vol. 261, Issue 1 https://doi.org/10.3847/1538-4365/ac6602	journal	July 2022
BASS. XXII. The BASS DR2 AGN Catalog and Data Koss, Michael J.; Ricci, Claudio; Trakhtenbrot, Benny The Astrophysical Journal Supplement Series, Vol. 261, Issue 1 https://doi.org/10.3847/1538-4365/ac6c05	journal	July 2022
BASS. XXI. The Data Release 2 Overview Koss, Michael J.; Trakhtenbrot, Benny; Ricci, Claudio The Astrophysical Journal Supplement Series, Vol. 261, Issue 1 https://doi.org/10.3847/1538-4365/ac6c8f	journal	July 2022
The Limitations of Optical Spectroscopic Diagnostics in Identifying Active Galactic Nuclei in the Low-mass Regime Cann, Jenna M.; Satyapal, Shobita; Abel, Nicholas P. The Astrophysical Journal, Vol. 870, Issue 1 https://doi.org/10.3847/2041-8213/aaf88d	journal	January 2019

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79 ASTRONOMY AND ASTROPHYSICS
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BASS. XXIV. The BASS DR2 Spectroscopic Line Measurements and AGN Demographics

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