Physics
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005tmgm.meet.1263g&link_type=abstract
The Tenth Marcel Grossmann Meeting. Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF), Rio
Physics
Scientific paper
I review the results obtained with recent XMM-Newton and INTEGRAL observations of the Center of our Galaxy, and concerning Sgr A*, the radiative counterpart of the massive black hole at the galactic nucleus. The X-ray observations performed in 2001 and 2002 have led to the discovery of bright X-ray flares from Sgr A* in the range 2-10 keV confirming previous Chandra detection and opening new perspectives to understand the processes at work in this object. The INTEGRAL observations of spring 2003 have provided evidence for an excess in the energy range 20-100 keV in the central 10' of the Galaxy. With a measured flux of ~ 3 mCrabs the excess is compatible with a point source located at the Sgr A* position and a contribution to the measured flux from the massive black hole cannot be excluded. I will mention the implications of these results on the proposed models of Sgr A* and the future observational perspectives.
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