91 citations · 197 across the 5 of their papers we have counts for
5 papers
XMM - Newton observations of Markarian 421
W. Brinkmann, S. Sembay, R. G. Griffiths +6
The BL Lac object Mrk 421 was observed on May 25, 2000 during the XMM - Newton CAL/PV phase. The high throughput of the X-ray telescopes and the spectral capabilities of the instru…
BeppoSAX observations of 3C 273
Francesco Haardt
We present preliminary results of BeppoSAX AO1 observations of 3C 273 performed in January 1997. We also present a close comparison with data obtained during the satellite SVP, in…
ROSAT Soft X-Ray Properties of the Large Bright Quasar Survey: Modeling of Stacked X-Ray Spectra
Norbert Schartel, Paul J. Green, Scott F. Anderson +6
We develop and apply a novel method of analysis to study the X-ray spectral properties of 908 QSOs in the Large Bright Quasar Survey (LBQS) that were observed during the soft X-ray…
Is the X-ray spectrum of the Seyfert 2 galaxy NGC5252 intrinsically flat?
M. cappi, T. Mihara, M. Matsuoka +3
The first X-ray observation of the Seyfert 2 galaxy NGC5252 is reported. ASCA collected photons/detector enough to perform an accurate spectral analysis of this source.…
Multiwavelength Monitoring of the BL Lac Object PKS 2155-304 I. The IUE Campaign
C. M. Urry
Daily monitoring of PKS 2155-304 with the IUE satellite throughout November 1991 has revealed dramatic, large-amplitude, rapid variations in the ultraviolet flux of this BL Lac obj…