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BASS. XXVIII. Near-infrared Data Release 2: High-ionization and Broad Lines in Active Galactic Nuclei

den Brok, Jakob S. and Koss, Michael J. and Trakhtenbrot, Benny and Stern, Daniel and Cantalupo, Sebastiano and Lamperti, Isabella and Ricci, Federica and Ricci, Claudio and Oh, Kyuseok and Bauer, Franz E. and Riffel, Rogerio and Rodríguez-Ardila, Alberto and Bär, Rudolf and Harrison, Fiona and Ichikawa, Kohei and Mejía-Restrepo, Julian E. and Mushotzky, Richard and Powell, Meredith C. and Boissay-Malaquin, Rozenn and Stalevski, Marko and Treister, Ezequiel and Urry, C. Megan and Veilleux, Sylvain (2022) BASS. XXVIII. Near-infrared Data Release 2: High-ionization and Broad Lines in Active Galactic Nuclei. Astrophysical Journal Supplement Series, 261 (1). Art. No. 7. ISSN 0067-0049. doi:10.3847/1538-4365/ac5b66.

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We present the BAT AGN Spectroscopic Survey (BASS) Near-infrared Data Release 2 (DR2), a study of 168 nearby (z̅ = 0.04, z < 0.6) active galactic nuclei (AGN) from the all-sky Swift Burst Array Telescope X-ray survey observed with Very Large Telescope (VLT)/X-shooter in the near-infrared (NIR; 0.8 - 2.4 μm). We find that 49/109 (45%) Seyfert 2 and 35/58 (60%) Seyfert 1 galaxies observed with VLT/X-shooter show at least one NIR high-ionization coronal line (CL, ionization potential χ > 100 eV). Comparing the emission of the [Si vi] λ1.9640 CL with the X-ray emission for the DR2 AGN, we find a significantly tighter correlation, with a lower scatter (0.37 dex) than for the optical [O iii] λ5007 line (0.71 dex). We do not find any correlation between CL emission and the X-ray photon index Γ. We find a clear trend of line blueshifts with increasing ionization potential in several CLs, such as [Si vi] λ1.9640, [Si x] λ1.4300, [S viii] λ0.9915, and [S ix] λ1.2520, indicating the radial structure of the CL region. Finally, we find a strong underestimation bias in black hole mass measurements of Sy 1.9 using broad Hα due to the presence of significant dust obscuration. In contrast, the broad Paα and Paβ emission lines are in agreement with the M-σ relation. Based on the combined DR1 and DR2 X-shooter sample, the NIR BASS sample now comprises 266 AGN with rest-frame NIR spectroscopic observations, the largest set assembled to date.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
den Brok, Jakob S.0000-0002-8760-6157
Koss, Michael J.0000-0002-7998-9581
Trakhtenbrot, Benny0000-0002-3683-7297
Stern, Daniel0000-0003-2686-9241
Cantalupo, Sebastiano0000-0001-5804-1428
Lamperti, Isabella0000-0003-3336-5498
Ricci, Federica0000-0001-5742-5980
Ricci, Claudio0000-0001-5231-2645
Oh, Kyuseok0000-0002-5037-951X
Bauer, Franz E.0000-0002-8686-8737
Riffel, Rogerio0000-0002-1321-1320
Rodríguez-Ardila, Alberto0000-0002-7608-6109
Bär, Rudolf0000-0001-5481-8607
Harrison, Fiona0000-0003-2992-8024
Ichikawa, Kohei0000-0002-4377-903X
Mejía-Restrepo, Julian E.0000-0001-8450-7463
Mushotzky, Richard0000-0002-7962-5446
Powell, Meredith C.0000-0003-2284-8603
Boissay-Malaquin, Rozenn0000-0003-2704-599X
Stalevski, Marko0000-0001-5146-8330
Treister, Ezequiel0000-0001-7568-6412
Urry, C. Megan0000-0002-0745-9792
Veilleux, Sylvain0000-0002-3158-6820
Additional Information:© 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 2020 August 11; revised 2021 December 16; accepted 2021 December 28; published 2022 July 15. The BAT AGN Spectroscopic Survey Data Release 2. Based on observations collected under programs 086.B-0135(A), 089.B-0951(A), 090.A-0830(A), 091.B-0900(B), 093.A-0766(A), 098.A-0635(B), 099.A-0403(B), 0101.A-0765(A), and 0102.A-0433(A) with X-shooter at the Very Large Telescope of the Paranal Observatory in Chile, operated by the European Southern Observatory. We acknowledge support from NASA through ADAP award NNH16CT03C and 80NSSC19K0749 (M.J.K.); the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme through grant agreement No. 726384/Empire (J.S.d.B.); the Israel Science Foundation through grant No. 1849/19 (B.T.); the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program, through grant agreement No. 950533 (B.T.); the Comunidad de Madrid through the Atracción de Talento Investigador Grant 2018-T1/TIC-11035 (I.L.); National Research Foundation of Korea award NRF-2020R1C1C1005462 (K.O.); the Japan Society for the Promotion of Science, ID: 17321 (K.O.); the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA (D.S.); Swiss National Science Foundation grants PP00P2_163824 and PP00P2_190092 (S.C.); the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme grant agreement No. 864361 (S.C.); ANID grants CATA-Basal AFB-170002 (F.E.B., F.R., E.T.) and ANID BASAL project FB210003 (F.E.B., C.R., E.T.), FONDECYT Regular 1190818 (E.T., F.E.B.) and 1200495 (F.E.B., E.T.), Fondecyt Iniciacion grant 11190831 (C.R.), FONDECYT Postdoctorado 3180506 (F.R.), and Millennium Science Initiative ICN12_009 (F.E.B.); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), CAPES, and FAPERGS (R.R.); CNPq, through grant 312036/2019-1 (A.R.-A.); and the Ministry of Education, Science and Technological Development of the Republic of Serbia through contract No. 451-03-9/2021-14/200002 and the Science Fund of the Republic of Serbia, PROMIS 6060916, BOWIE (M.S.). This work was performed in part at the Aspen Center for Physics, which is supported by National Science Foundation grant PHY-1607611. Facilities: ESO-VLT - , Swift (BAT). - Software: astropy (Astropy Collaboration et al. 2013), Matplotlib (Hunter 2007), NumPy (van der Walt et al. 2011), Linmix (, PySpecKit v0.1.20 (Ginsburg & Mirocha 2011), ESO Reflex software v2.9.3 (Freudling et al. 2013), molecfit v1.5.9 (Kausch et al. 2015; Smette et al. 2015).
Group:Astronomy Department, Space Radiation Laboratory
Funding AgencyGrant Number
European Research Council (ERC)726384
Israel Science Foundation1849/19
European Research Council (ERC)950533
Comunidad de Madrid2018-T1/TIC-11035
National Research Foundation of KoreaNRF-2020R1C1C1005462
Japan Society for the Promotion of Science (JSPS)17321
Swiss National Science Foundation (SNSF)PP00P2_163824
Swiss National Science Foundation (SNSF)PP00P2_190092
European Research Council (ERC)864361
Agencia Nacional de Investigación y Desarrollo (ANID)FB210003
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1190818
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1200495
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)11190831
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)3180506
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)ICN12_009
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)312036/2019-1
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)UNSPECIFIED
Fundação de Amparo à pesquisa do Estado do Rio Grande do Sul (FAPERGS)UNSPECIFIED
Ministry of Education, Science and Technological Development (Serbia)451-03-9/2021-14/200002
Science Fund (Serbia)6060916
Subject Keywords:Active galactic nuclei
Issue or Number:1
Classification Code:Unified Astronomy Thesaurus concepts: Active galactic nuclei (16)
Record Number:CaltechAUTHORS:20220727-37095000
Persistent URL:
Official Citation:Jakob S. den Brok et al 2022 ApJS 261 7
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115905
Deposited By: George Porter
Deposited On:29 Jul 2022 17:31
Last Modified:29 Jul 2022 17:31

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