This is a resubmission of phase 2 to change several values of FLASH exposure time. 2101308608 ----- Attempting Submission 1 (Thu Mar 26 16:39:34 GMT 2015) ----- ----- Attempting Submission 2 (Tue Nov 17 09:15:24 GMT 2015) ----- Optical emission observed from ultraluminous X-ray sources (ULXs) comes from the irradiated disk and the donor star. Disentangling the two components has always been an unsolved problem. We have discovered that the ULX NGC 1313 X-2 switches between two distinct X-ray spectral/luminosity states on long timescales, ~ 6--10 weeks. This makes it an ideal laboratory to study the effects of variable X-ray irradiation on the disk and donor star. We propose a multiband study of NGC 1313 X-2 from near-IR to X-rays, with XMM, HST and Swift. We will measure the contribution of X-ray reprocessing to the optical emission and determine whether irradiation correlates with disk winds. This joint proposal aims to observe an ultraluminous X-ray source in two distinct X-ray modes. Two target of opportunity sets of observations will be triggered using an X-ray monitoring with Swift. Once triggered, a simultaneous HST/XMM observation should be carried out within 28 days. The HST observations consist of imaging in seven broad-band filters, from far-UV to NIR wavelengths using ACS/SBC, WFC3/UVIS and WFC3/IR. RESOLVED STELLAR POPULATIONS 12 false false false false 100 SUPPORTED UNIDENTIFIED ACCRETION DISK OPTICAL EMITTER ULTRAVIOLET EMITTER WIND X-RAY EMITTER This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 POS-TARG DITHER 0.135 LINE false false 3 46.84 WFC3-UVIS-DITHER-LINE-3PT 1 false POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 2 false POS-TARG DITHER 0.179 LINE 0.116 false false 63.65 4 20.02 ACS-SBC-DITHER-BOX 3 false 1447751716579 /tmp/OPVisit4546488152905715497.xml The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. 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CASM was run in Phase II mode. /tmp/OPVisit9139460063705124824.xml (Tic-Visit :proposal-id 14057 :visit-id "02" :proposal-version -1 :trans-version "20150609" :date "17-Nov-2015 10:14:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 5449856 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14057 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 14057 :visit-id "02" :obset-id "A2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14057 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3021 :al-overhead-at-end 123 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3556 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14057 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3129 :al-overhead-at-end 123 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3556 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14057 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3129 :al-overhead-at-end 119 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3556 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14057 :visit-id "02" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3093 :al-overhead-at-end 0 :internal-dur-at-end 500 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3556 :pcs-gap 0 ) true 4 0