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astro-ph2000
Optical and X-ray monitoring of the NLS1 galaxy Ark 564
I. E. Papadakis, W. Brinkmann, H. Negoro +3
The Narrow-line Seyfert galaxy Ark 564 was monitored between June 04, 2000 and June 24, 2000 from Skinakas Observatory. The B,V,R and I band light curves show night to night variat…
astro-ph2000
ROSAT HRI monitoring of X-ray variability in the NLS1 galaxy PKS 0558-504
M. Gliozzi, Th. Boller, W. Brinkmann +1
We present the results of ROSAT High Resolution Imager (HRI) observations and the survey data of the radio-loud Narrow-Line Seyfert 1 galaxy (NLS1) PKS 0558--504. We find strong an…