BASS. XXIV : the BASS DR2 spectroscopic line measurements and AGN demographics
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/249622 |
Resumo: | 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 NH = 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). |
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Oh, KyuseokKoss, MichaelUeda, YoshihiroStern, DanielRicci, ClaudioTrakhtenbrot, BennyPowell, MeredithBrok, Jakob denLamperti, IsabellaMushotzky, RichardRicci, FedericaBär, RudolfRojas, AlejandraIchikawa, KoheiRiffel, RogérioTreister, EzequielHarrison, Fiona AnneUrry, C. MeganBauer, Franz ErikSchawinski, Kevin2022-10-03T04:49:04Z20220067-0049http://hdl.handle.net/10183/249622001147270We 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 NH = 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).application/pdfengThe astrophysical journal. Supplement series. Chicago. Vol. 261, no. 1 (July 2022), 4, 24 p.EspectroscopiaTelescópios astronômicosBuracos negrosNucleo galaticoGaláxias ativasSupermassive black holesActive galactic nucleiX-ray active galactic nucleiAGN host galaxiesQuasarsBASS. XXIV : the BASS DR2 spectroscopic line measurements and AGN demographicsEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001147270.pdf.txt001147270.pdf.txtExtracted Texttext/plain91014http://www.lume.ufrgs.br/bitstream/10183/249622/2/001147270.pdf.txtdc69a5890f9f32d23f2cb507be0084f2MD52ORIGINAL001147270.pdfTexto completo (inglês)application/pdf2409090http://www.lume.ufrgs.br/bitstream/10183/249622/1/001147270.pdfe1892815f9e7f2b10a3f71d51e013dafMD5110183/2496222023-09-27 03:36:39.747152oai:www.lume.ufrgs.br:10183/249622Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-09-27T06:36:39Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
BASS. XXIV : the BASS DR2 spectroscopic line measurements and AGN demographics |
title |
BASS. XXIV : the BASS DR2 spectroscopic line measurements and AGN demographics |
spellingShingle |
BASS. XXIV : the BASS DR2 spectroscopic line measurements and AGN demographics Oh, Kyuseok Espectroscopia Telescópios astronômicos Buracos negros Nucleo galatico Galáxias ativas Supermassive black holes Active galactic nuclei X-ray active galactic nuclei AGN host galaxies Quasars |
title_short |
BASS. XXIV : the BASS DR2 spectroscopic line measurements and AGN demographics |
title_full |
BASS. XXIV : the BASS DR2 spectroscopic line measurements and AGN demographics |
title_fullStr |
BASS. XXIV : the BASS DR2 spectroscopic line measurements and AGN demographics |
title_full_unstemmed |
BASS. XXIV : the BASS DR2 spectroscopic line measurements and AGN demographics |
title_sort |
BASS. XXIV : the BASS DR2 spectroscopic line measurements and AGN demographics |
author |
Oh, Kyuseok |
author_facet |
Oh, Kyuseok Koss, Michael Ueda, Yoshihiro Stern, Daniel Ricci, Claudio Trakhtenbrot, Benny Powell, Meredith Brok, Jakob den Lamperti, Isabella Mushotzky, Richard Ricci, Federica Bär, Rudolf Rojas, Alejandra Ichikawa, Kohei Riffel, Rogério Treister, Ezequiel Harrison, Fiona Anne Urry, C. Megan Bauer, Franz Erik Schawinski, Kevin |
author_role |
author |
author2 |
Koss, Michael Ueda, Yoshihiro Stern, Daniel Ricci, Claudio Trakhtenbrot, Benny Powell, Meredith Brok, Jakob den Lamperti, Isabella Mushotzky, Richard Ricci, Federica Bär, Rudolf Rojas, Alejandra Ichikawa, Kohei Riffel, Rogério Treister, Ezequiel Harrison, Fiona Anne Urry, C. Megan Bauer, Franz Erik Schawinski, Kevin |
author2_role |
author author author author author author author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Oh, Kyuseok Koss, Michael Ueda, Yoshihiro Stern, Daniel Ricci, Claudio Trakhtenbrot, Benny Powell, Meredith Brok, Jakob den Lamperti, Isabella Mushotzky, Richard Ricci, Federica Bär, Rudolf Rojas, Alejandra Ichikawa, Kohei Riffel, Rogério Treister, Ezequiel Harrison, Fiona Anne Urry, C. Megan Bauer, Franz Erik Schawinski, Kevin |
dc.subject.por.fl_str_mv |
Espectroscopia Telescópios astronômicos Buracos negros Nucleo galatico Galáxias ativas |
topic |
Espectroscopia Telescópios astronômicos Buracos negros Nucleo galatico Galáxias ativas Supermassive black holes Active galactic nuclei X-ray active galactic nuclei AGN host galaxies Quasars |
dc.subject.eng.fl_str_mv |
Supermassive black holes Active galactic nuclei X-ray active galactic nuclei AGN host galaxies Quasars |
description |
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 NH = 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). |
publishDate |
2022 |
dc.date.accessioned.fl_str_mv |
2022-10-03T04:49:04Z |
dc.date.issued.fl_str_mv |
2022 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/249622 |
dc.identifier.issn.pt_BR.fl_str_mv |
0067-0049 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001147270 |
identifier_str_mv |
0067-0049 001147270 |
url |
http://hdl.handle.net/10183/249622 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The astrophysical journal. Supplement series. Chicago. Vol. 261, no. 1 (July 2022), 4, 24 p. |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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