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astro-ph2004
Integral observation of Cyg X-1 in an intermediate state
J. Malzac, P. O. Petrucci, E. Jourdain +11
We present preliminary results of an observation of Cygnus X-1 with INTEGRAL performed on June 7-11 2003. Both spectral and variability properties of the source indicate that Cygnu…
astro-ph1999
Long-Term Variability of the Hard X-ray Source GRS 1758-258: GRANAT/SIGMA Observations
S. I. Kuznetsov, M. R. Gilfanov, E. M. Churazov +13
The results of GRANAT/SIGMA hard X-ray observations of GRS 1758-258 in 1990-1998 are presented. The source lies at ~5\arcdeg from the Galactic Center and was within the SIGMA field…
astro-ph1999
Deep SIGMA observations of the central square degree of the Galaxy
P. Goldoni, A. Goldwurm, F. Lebrun +13
The Center of the Milky Way emits radiation through all the electromagnetic spectrum due to the presence of several astrophysical phenomena. Various scientifical questions remain u…