The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX). I. Sample Selection

Liu, Chenxu; Gebhardt, Karl; Cooper, Erin Mentuch; Davis, Dustin; Schneider, Donald P.; Ciardullo, Robin; Farrow, Daniel J.; Finkelstein, Steven L.; Gronwall, Caryl; Guo, Yuchen; Hill, Gary J.; House, Lindsay; Jeong, Donghui; Jogee, Shardha; Kollatschny, Wolfram; Krumpe, Mirko; Landriau, Martin; Ortiz, Oscar A. Chavez und Zhang, Yechi (2022): The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX). I. Sample Selection. In: Astrophysical Journal (Supplement Series), Bd. 261, Nr. 2, 24

Abstract

We present the first active galactic nuclei (AGN) catalog of the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) observed between 2017 January and 2020 June. HETDEX is an ongoing spectroscopic survey (3500-5500 angstrom) with no target preselection based on magnitudes, colors or morphologies, enabling us to select AGN based solely on their spectral features. Both luminous quasars and low-luminosity Seyferts are found in our catalog. AGN candidates are selected with at least two significant AGN emission lines, such as the Ly alpha and C IV lambda 1549 line pair, or with a single broad emission line with FWHM > 1000 km s(-1). Each source is further confirmed by visual inspections. This catalog contains 5322 AGN, covering an effective sky coverage of 30.61 deg(2). A total of 3733 of these AGN have secure redshifts, and we provide redshift estimates for the remaining 1589 single broad-line AGN with no crossmatched spectral redshifts from the Sloan Digital Sky Survey Data Release 14 of QSOs. The redshift range of the AGN catalog is 0.25 < z < 4.32, with a median of z = 2.1. The bolometric luminosity range is 10(9)-10(14) L-circle dot with a median of 10(12) L-circle dot. The median r-band magnitude of our AGN catalog is 21.6 mag, with 34% having r > 22.5, and 2.6% reaching the detection limit at r similar to 26 mag of the deepest imaging surveys we searched. We also provide a composite spectrum of the AGN sample covering 700-4400 angstrom.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0067-0049
• Sprache: Englisch