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Optical Properties of Soft X-ray Selected Bright New ROSAT AGN

Published online by Cambridge University Press:  19 July 2016

D. Grupe ,
K. Beuermann ,
K. Reinsch ,
H.-C. Thomas  and
H.H. Fink
D. Grupe
Affiliation:
Universitäts-Sternwarte Göttingen, FRG
K. Beuermann
Affiliation:
Universitäts-Sternwarte Göttingen, FRG
K. Reinsch
Affiliation:
Universitäts-Sternwarte Göttingen, FRG
H.-C. Thomas
Affiliation:
MPI f. Astrophysik, Garching, FRG, and MPI f. Extraterrestrische Physik, Garching, FRG
H.H. Fink
Affiliation:
MPI f. Astrophysik, Garching, FRG, and MPI f. Extraterrestrische Physik, Garching, FRG

Abstract

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Optical identification of bright sources from the ROSAT All-Sky Survey has led to the discovery of 40 new Seyfert galaxies with very soft X-ray spectra. Nearly half of these are narrow-line Seyfert 1 (Hβ-FWHM < 2000 km/s) with strong optical FeII emission, suggesting the presence of an unseen hard X-ray component. The remainder are Sy1.5 and a few broad-line Sy1.

Keywords

Soft X-raynarrow-line Seyfert 1
Type
Poster contributions: Statistical Studies and Evolution
Information
Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 508
Copyright
Copyright © Kluwer 1994