The recently discovered G2 dense dusty gas cloud, infalling towards the dormant SMBH at the center of our galaxy SgrA*, should reach its pericenter in September 2013. The X-ray luminosity of SgrA* is expected to increase significantly at this period and the fragmentation of this cloud should lead to an enhanced activity period over several months/years. Therefore, we propose a large program to monitor SgrA* during the course of the G2 cloud near its pericenter passage and after this event, combining the XMM-Newton high-throughput with several multi-wavelength observations with ground-based telescopes and satellites. This will offer us an unique opportunity to study accretion events on a dormant SMBH and its (re-)activation process. Our XMM observations will occur in 3 blocks of 53 ksec each, on Feb 27, Mar 15, and Apr 04, 2014 with the observation starts matching the VLT visibility windows of Sgr A* in Chile. Our plan is to use the 5-6 consecutive SAA-free orbits that are available each day to obtain observations over a time span of 8 hours, interrupted only by Earth occultation. We plan to obtain the WFC3/IR observations with the F153M filter. We will use the SPARS25 readout sequence, which gives us stable, equally-spaced readout intervals of 25 secs, and a total time per exposure of 5-6 minutes, which is long enough to perform WFC3 buffer dumps in parallel with the exposures, thus maximizing our on-source time. We will embed the exposures within a dither pattern in order to mitigate the effects of bad pixels, flat-field uncertainties, and persistence from bright stars. A total of 8 such exposures can be obtained in each orbit, giving us nearly constant coverage of Sgr A* over a span of about 50 minutes per orbit. Simultaneous XMM-Newton and HST observations. The 6 HST orbits of this joint XMM/HST program 13403 (PI: N. Grosso) must be scheduled in coordination with the 22 HST orbits awarded to the companion program 13316 (PI: H. Bushouse). AGN/QUASARS Default false false 53 false false false SUPPORTED STELLAR CLUSTER ACCRETION DISK YOUNG ASSOCIATION This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 0.15 mJy in H-band WFC3/IR Imaging No No F153M POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 1 false The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. /private/var/folders/0c/5011wfl508g14lx4917hgxmr0006vr/T/OPVisit4150830681529819817.xml 1388675093820 (Tic-Visit :proposal-id 13403 :visit-id "01" :proposal-version -1 :trans-version "20131031" :date "02-Jan-2014 10:04:50.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 6 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 11629296 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13403 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13403 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2800 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13403 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2900 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13403 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2900 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13403 :visit-id "01" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2900 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13403 :visit-id "01" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2900 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13403 :visit-id "01" :orbit-number 6 :pcs-time 222 :si-vis-utilization 2900 :al-overhead-at-end 0 :internal-dur-at-end 595 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) true 6 0