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…