Kavli Affiliate: Claudio Ricci
| First 5 Authors: Michael J. Koss, Claudio Ricci, Benny Trakhtenbrot, Kyuseok Oh, Jakob S. den Brok
| Summary:
We present the AGN catalog and optical spectroscopy for the second data
release of the Swift BAT AGN Spectroscopic Survey (BASS DR2). With this DR2
release we provide 1425 optical spectra, of which 1181 are released for the
first time, for the 858 hard X-ray selected AGN in the Swift BAT 70-month
sample. The majority of the spectra (813/1425, 57%) are newly obtained from
VLT/Xshooter or Palomar/Doublespec. Many of the spectra have both higher
resolution (R>2500, N~450) and/or very wide wavelength coverage (3200-10000 A,
N~600) that are important for a variety of AGN and host galaxy studies. We
include newly revised AGN counterparts for the full sample and review important
issues for population studies, with 44 AGN redshifts determined for the first
time and 780 black hole mass and accretion rate estimates. This release is
spectroscopically complete for all AGN (100%, 858/858) with 99.8% having
redshift measurements (857/858) and 96% completion in black hole mass estimates
of unbeamed AGN (outside the Galactic plane). This AGN sample represents a
unique census of the brightest hard X-ray selected AGN in the sky, spanning
many orders of magnitude in Eddington ratio (Ledd=10^-5-100), black hole mass
(MBH=10^5-10^10 Msun), and AGN bolometric luminosity (Lbol=10^40-10^47 ergs/s).
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