A Complete Sample of Soft X-Ray-Selected AGNs. I. The Data
Abstract
We present the optical spectra and simple statistical analysis for a complete sample of 110 soft X-ray-selected AGNs. About half of the sources are narrow-line Seyfert 1 galaxies (NLS1's), which have the steepest X-ray spectra, the strongest Fe II emission, and slightly weaker [O III] λ5007 emission than broad-line Seyfert 1's (BLS1's). Kolmogorov-Smirnov tests show that NLS1's and BLS1's have clearly different distributions of the X-ray spectral slope αX, X-ray short-term variability, and Fe II equivalent widths and luminosity and Fe II/Hβ ratios. The differences in the [O III]/Hβ and [O III] equivalent widths are only marginal. We found no significant differences between NLS1's and BLS1's in their rest-frame 0.2-2.0 X-ray luminosities, rest-frame 5100 monochromatic luminosities, bolometric luminosities, redshifts, and their Hβ equivalent widths.
Based in part on observations at the European Southern Observatory, La Silla (Chile), with the 2.2 m telescope of the Max Planck Society during MPI and ESO time, and the ESO 1.52 m telescope during ESO time in 1995 September and 1999 September.- Publication:
-
The Astronomical Journal
- Pub Date:
- January 2004
- DOI:
- 10.1086/380233
- arXiv:
- arXiv:astro-ph/0310027
- Bibcode:
- 2004AJ....127..156G
- Keywords:
-
- Galaxies: Active;
- Galaxies: Quasars: General;
- Astrophysics
- E-Print:
- Accepted for publication in AJ (scheduled for January 2004), 21 pages, 10 figures, The paper including the optical spectra and FeII subtracted spectra can be retrieved from http://www.astronomy.ohio-state.edu/~dgrupe/research/sample_paper1.html