We report the association of the recently discovered hard X-ray source \igr with the giant molecular cloud \sgrb in the Galactic Center region. The broad band (3-200 keV) spectrum of the source constructed from data of different observatories strongly supports the idea that the X-ray emission of \sgrb is Compton scattered and reprocessed radiation emitted in the past by the \sgra source. We conclude that 300-400 years ago \sgra was a low luminosity (L 1.5* 1039 erg s-1 at 2-200 keV) AGN with a characteristic hard X-ray spectrum (photon index \Gamma 1.8). We estimate the mass and iron abundance of the \sgrb scattering gas at 2* 106Mo(r/10 pc)2 and 1.9 solar, respectively (where r is the radius of the cloud).
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