Monitoring Sgr A* X-ray and Near-Infrared flaring activity

We propose to continue the monitoring of the flaring activity of the galacticsupermassive black hole Sgr A*, with XMMNewton and the VLT in order to detect anew brigth and long Xray/NearIR flare from this source that will allow us to:1) Measure simultaneously the flare spectral shape in the Xray and NIR bandsand thus reveal the emission mechanisms and the accretion/ejection flowsproperties in the vicinity of the BH. 2) Confirm the presence of periodic X raymodulations on timescales of 2030 min, and measure the period and the lightcurve shape in order to explore the behavior of accreting matter at the veryedge of the BH event horizon and possibly constrain the BH spin. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]