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New bright soft X-ray selected ROSAT AGN
II. Optical emission line properties *
D. Grupe ** 1,2,
K. Beuermann 1,2,
K. Mannheim 2 and
H.-C. Thomas 3
Received 18 May 1998 / Accepted 3 August 1999
We present the emission line properties of a sample of 76 bright soft X-ray selected ROSAT Active Galactic Nuclei. All optical counterparts are Seyfert 1 galaxies with rather narrow permitted lines, strong optical FeII line blends, and weak forbidden lines. By selection, they also have steep soft X-ray spectra when compared with typical Seyfert 1 galaxies. We discuss possible origins of these peculiar trends employing detailed correlation analyses, including a Principal Component Analysis. The optical spectra are presented in the Appendix.
Key words: accretion, accretion disks galaxies: active galaxies: nuclei galaxies: Seyfert galaxies: quasars: general
* Based in part on observations at the European Southern Observatory La Silla (Chile) with the 2.2m telescope of the Max-Planck-Society during MPG and ESO time. All spectra can be retrieved via CDS anonymous FTP 184.108.40.206.
Send offprint requests to: D. Grupe (email@example.com)
Online publication: October 14, 1999