Science Keywords: Select from 2 to 5 items. Science Keywords is a required field. 0 Assigned ID: 1625 ----- Attempting Submission 1 (Mon Dec 11 15:56:57 GMT 2017) ----- Joint XMM/HST The program will have one orbit observation of a hyperluminous X-ray source at a distance of 247 Mpc using ACS/WFC F775W. It uses a dither-box patterm, with 544 second per exposure (2176 s in total). I hope the setting can maximize the S/N but also minimize the cosmic ray effects. WFC1-CTE aperture has been used to shift my target close to the readout. I am also interested in some region surround the original target at (21 50 22.5, -05 51 9.09). So I move the target a little bit and use shifts in X and Y so that the region can be all in the FOV. The schedule of the visit seems to have been fixed on May 24 2018 to Jun 3 2018, so the role angle should be between 225-273 degree. Please let me know if there is any better setting. Feb 06, 2018 -2011967318 ----- Attempting Submission 1 (Thu Jan 11 03:50:46 GMT 2018) ----- ----- Attempting Submission 2 (Thu Jan 25 17:00:02 GMT 2018) ----- ----- Attempting Submission 3 (Tue Feb 06 16:38:02 GMT 2018) ----- Intermediate-mass black holes (IMBH, ~10^2-10^5 msun) have been long sought after because they are associated with several important astrophysical processes. The best IMBH candidates are hyperluminous off-nuclear X-ray sources (HLXs) with LX>10^41 erg/s, but very few are known. We have identified a new HLX candidate (LX~10^43 erg/s), at an offset of 11.6" (12 kpc) from the center of its host galaxy (D L=247 Mpc). We request a deep (60 ks) XMM-Newton observation of the source in AO17 to measure its flux and spectral evolution while it is in the decay phase of a prolonged outburst, in order to demonstrate its IMBH nature and confirm our tidal disruption event explanation for the outburst. An HST orbit is also requested to confirm that our source is in a star cluster. The program will have one orbit observation of a hyperluminous X-ray source at a distance of 247 Mpc using ACS/WFC F775W. It uses a dither-box patterm, with 544 second per exposure (2176 s in total). Massive Black Holes And Their Host Galaxies Galaxies and the IGM 6 false false false false false false SUPPORTED STELLAR CLUSTER ACCRETION DISK GLOBULAR CLUSTER NO J2000 J2000 ACS/WFC Imaging No No F775W POS-TARG DITHER 0.262 LINE 0.192 false false 68.14 4 18.39 ACS-WFC-DITHER-BOX 1 false 1517934627653 /Users/lindc/Dropbox/backup2/y201710_xmm_hlx244mpc/hststage2/OP-cache/imbhhstphase2-v01.xml The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15441 :visit-id "01" :proposal-version -1 :trans-version "20171009" :date "06-Feb-2018 11:30:27.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1136896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15441 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15441 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2870 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3205 :pcs-gap 0 ) true 1 0