UNDERSTANDING THE HIGH ENERGY FLARING ACTIVITY OF THE GALACTIC NUCLEUS

We propose to carry out a large (550 ks) XMMNewton monitoring program of SgrA ^* , the radiative manifestation of the putative massive black hole at thegalactic center, to study in detail the broad band spectrum and timingproperties of the source during its Xray flaring activity. The program will beperformed in coordination with INTEGRAL gammaray observations of the galacticcenter and with observations at lower frequencies. Although the galactic nucleushosts the nearest and probably best studied massive black hole its physical andradiative properties and in particular its low level of high energy emission arestill little understood. The discovery of bright Xray flares from SgrvirgulA* withChandra and XMMNewton truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]