3 papers
astro-ph1999
Strong optical line variability in Mkn 110
K. Bischoff, W. Kollatschny
We present results of a long-term variability campaign on the Seyfert 1 galaxy Markarian 110. Mkn 110 is a narrow-line Seyfert 1 object hosted in a morphological peculiar galaxy. W…
astro-ph1998
Profile variations in AGN spectra
W. Kollatschny, K. Bischoff
We present results of optical long-term variability campaigns (10 - 20 years) of the two Seyfert galaxies NGC 7603 and Mrk 110. The variations of the continuum, of the individual b…
astro-ph1998
New active galactic nuclei detected in ROSAT All Sky Survey galaxies; Part I: Verification of selection strategy
W. Pietsch, Th. Boller, S. Doebereiner +3
We present the first results of a program to identify so far unknown active nuclei (AGN) in galaxies. Candidate galactic nuclei have been selected for optical spectroscopy from a c…