127 citations · 2.2k across the 77 of their papers we have counts for
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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…
XMM-Newton monitoring of X-ray variability in the quasar PKS 0558-504
M. Gliozzi, W. Brinkmann, P. T. O'Brien +4
We present the temporal analysis of X-ray observations of the radio-loud Narrow-Line Seyfert 1 galaxy (NLS1) PKS 0558-504 obtained during the XMM-Newton Calibration and Performance…
XMM-Newton observations of the BL Lac MS 0737+7441
Th. Boller, M. Gliozzi, G. Griffiths +5
We report on the XMM-Newton observations of the BL Lac object MS 0737.9+7441 during the performance verification phase. A simple power-law fit provides an adequate description of t…
XMM-Newton Detection of a Comptonized Accretion Disc in the Quasar PKS0558-504
P. T. O'Brien, J. N. Reeves, M. J. L. Turner +6
We present XMM-Newton observations of the bright quasar PKS0558-504. The 0.2-10 keV spectrum is dominated by a large, variable soft X-ray excess. The fastest flux variations imply…
X-ray observation of the super-luminal quasar 4C+73.18 (1928+738) by ASCA
W. Yuan, W. Brinkmann, M. Gliozzi +2
The results of an X-ray observation of the nearby core-dominated, super- luminal quasar 4C+73.18 (1928+738) with ASCA are reported. Variations of the 1-10keV flux on time-scales of…
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…