Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.3516g&link_type=abstract
American Astronomical Society, HEAD meeting #12, #35.16
Astronomy and Astrophysics
Astronomy
Scientific paper
We will report on the results from our most recent XMM and Swift observations of the Narrow Line Seyfert 1 galaxies WPVS 007 and Mkn 335. The X-ray transient AGN WPVS 007 was an X-ray bright source during the ROSAT All-Sky Survey, but basically disappeared from the X-ray sky for almost two decades. FUSE observations in 2003 revealed the nature of this disappearance: strong absorption. FUSE spectra showed deep absorption line troughs in the UV spectrum of WPVS 007. These findings make this AGN a direct link between NLS1s and Broad Absorption Line QSOs which are both thought to be high L/Ledd AGN. In the recent year Swift was able to detect WPVS 007 in X-ray at relatively bright states several times, suggesting that the absorber may have started to disappear. In some ways similar is the NLS1 Mkn 335 which has been observed in X-ray in a bright state over decades, but was found by Swift in an extremely low state in May 2007. Our XMM observation from June 2009 show the presence of a strong ionized partial covering absorber in the X-ray data of Mkn 335.
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