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astro-ph2004
Discovery of high-amplitude X-ray variability in the Seyfert-LINER transition galaxy NGC7589
W. Yuan, St. Komossa, D. Xu +3
We present the first result of a programme to search for large flux variations in the X-ray sources of the XMM Serendipitous Survey compared to previous ROSAT observations. An incr…
astro-ph2003
An AGN Sample with High X-ray-to-optical Flux Ratio from RASS II.Optical Emission Line Properties of Seyfert 1 Type AGN
D. W. Xu, Stefanie Komossa, J. Y. Wei +2
This work studies the optical emission line properties of a sample of 155 low-redshift bright X-ray selected ROSAT Seyfert~1 type AGN for which adequate signal-to-noise ratio spect…