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- Centre National de la Recherche ScientifiqueFR955 papers
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21 papers · 2 filters
The flat X-ray spectrum of the LINER NGC1052
M. Guainazzi, L. A. Antonelli
We report on ROSAT and ASCA observations of the LINER NGC1052, which is the first one where broad optical lines in polarized light have been observed. The 2-10 keV spectrum is very…
BeppoSAX observations of an orbital cycle of the X-ray binary pulsar GX301-2
M. Orlandini, D. Dal Fiume, F. Frontera +4
We present preliminary results on our campaign of observations of the X-ray binary pulsar GX301-2. BeppoSAX observed this source six times in January/February 1998: at the periastr…
Towards an Understanding of the Globular Cluster Over--abundance around the Central Giant Elliptical NGC 1399
Markus Kissler-Patig, Carl J. Grillmair, Georges Meylan +3
We investigate the kinematics of a combined sample of 74 globular clusters around NGC 1399. Their high velocity dispersion, increasing with radius, supports their association with…
One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays
G. Matt, M. Guainazzi, R. Maiolino +11
The Circinus Galaxy has been observed, for the first time above 10 keV, by BeppoSAX. An excess emission above the extrapolation of the best fit 0.1--10 keV spectrum is apparent in…
Reprocessing and Variable Cold Absorption in the Broad-Line Radio Galaxy 3C390.3
P. Grandi, M. Guainazzi, F. Haardt +5
A BeppoSAX observation of the BLRG 3C390.3 is reported. For the first time, both the 6.4 keV iron line and a strong reflection hump, produced by the illumination of the primary X-r…
The extraordinary X-ray spectrum of XTE J0421+560
A. Orr, A. N. Parmar, M. Orlandini +5
We report results of two BeppoSAX observations of the transient X-ray source XTE J0421+560 during the outburst that started in March 1998. The source exhibits radio jets and coinci…