Science Keywords: Select from 2 to 5 items. Science Keywords is a required field. 0 Your proposal could not be saved. Submission aborted. Assigned ID: 1306 ----- Attempting Submission 1 (Wed Dec 07 16:35:24 GMT 2016) ----- Joint XMM/HST 0 ----- Attempting Submission 1 (Thu Jan 19 21:28:44 GMT 2017) ----- We have discovered a decade-long X-ray tidal disruption candidate, which recent observations suggest to be still in the super-Eddington accretion phase but with sporadic dramatic spectral softening. We request three XMM-Newton monitorings in AO16 on this target, which is unique for study of the super-Eddington accretion onto supermassive black holes. The goals are to confirm its still being in the super-Eddington accretion phase and to measure the spectral softening occurrence rate, allowing us to determine whether the spectral softening is due to transient high-speed warm absorbers or state transition. We also request an HST orbit to help confirm the nuclear origin of the event and study its environment. The program will have one orbit observation of a decade-long tidal disruption event using two filters, F606W and F814W. F606W use a dither-box patterm, with 375 second per exposure (1500 s in total). F814W use a dither-line pattern with 351 second per exposure (702 s in total). Massive Black Holes and their Hosts 12 false false false false false false SUPPORTED GALAXY STARBURST YES J2000 J2000 WFC3/UVIS Imaging No No F555W POS-TARG DITHER 0.145 LINE false false 2 46.84 WFC3-UVIS-DITHER-LINE 2 false POS-TARG DITHER 0.173 LINE 0.112 false false 81.785 4 23.884 WFC3-UVIS-DITHER-BOX 3 false /tmp/OPVisit6046669078594827574.xml 1484853096951 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14905 :visit-id "01" :proposal-version -1 :trans-version "20160601" :date "19-Jan-2017 14:11:36.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1732496 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14905 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14905 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 120 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3210 :pcs-gap 0 ) true 1 0