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A BeppoSAX observation of the merging cluster Abell 3266
Sabrina De Grandi, Silvano Molendi
We present results from a BeppoSAX observation of the rich cluster Abell 3266. The broad band spectrum (2-50 keV) of the cluster, when fitted with an optically thin thermal emissio…
The BeppoSAX 1-8 keV cosmic background spectrum
A. Vecchi, S. Molendi, M. Guainazzi +2
The spectrum of the 1.0-8.0 keV cosmic X-ray background (CXB) at galactic latitudes > 25 degrees has been measured using the BeppoSAX LECS and MECS instruments. The spectrum is con…
BeppoSAX unveils the nuclear component in NGC 6240
P. Vignati, S. Molendi, G. Matt +10
The direct nuclear X-ray emission of the ultraluminous IRAS galaxy NGC 6240 has been observed for the first time by BeppoSAX. It is seen through an absorber with N_H=2*10^{24} cm^{…
The contribution of faint AGN to the hard X-ray background
F. Fiore, F. La Franca, P. Giommi +5
Hard X-ray selection is the most efficient way to discriminate between accretion-powered sources, such as AGN, from sources dominated by starlight. Hard X-rays are also less affect…
A Flux-limited Sample of Bright Clusters of Galaxies from the Southern Part of the ROSAT All-Sky Survey: the Catalog and the LogN-LogS
S. De Grandi, H. Böhringer, L. Guzzo +8
We describe the selection of an X-ray flux-limited sample of bright clusters of galaxies in the southern hemisphere, based on the first analysis of the ROSAT All-Sky Survey data (R…
The BeppoSAX view of the hard X-ray background
A. Comastri, F. Fiore, P. Giommi +5
First results on a medium-deep X-ray survey in the "new" 5-10 keV band carried out with the MECS detectors onboard BeppoSAX are presented. The High Energy Llarge Area Survey (HELLA…