0 Assigned ID: 496 ----- Attempting Submission 1 (Fri Mar 06 15:00:50 GMT 2020) ----- HST Phase I Proposal 496 successfully submitted. Receipt: # 496-1 ----- Attempting Submission 2 (Fri Mar 06 15:58:31 GMT 2020) ----- HST Phase I Proposal 496 successfully submitted. Receipt: # 496-2 ----- Attempting Submission 3 (Fri Mar 06 15:58:49 GMT 2020) ----- HST Phase I Proposal 496 successfully submitted. Receipt: # 496-3 ----- Attempting Submission 4 (Fri Mar 06 15:59:12 GMT 2020) ----- HST Phase I Proposal 496 successfully submitted. Receipt: # 496-4 ----- Attempting Submission 5 (Fri Mar 06 16:00:02 GMT 2020) ----- HST Phase I Proposal 496 successfully submitted. Receipt: # 496-5 ----- Attempting Submission 6 (Fri Mar 06 17:21:16 GMT 2020) ----- HST Phase I Proposal 496 successfully submitted. Receipt: # 496-6 v.1. There are outstanding questions in the description of observations. These questions should be resolved prior to the final version of phase II, and we hope fo the help and advice in addressing these issues. v.2 The acq strategy was changed. We would be grateful for advice on FP-POS, BUFFER-TIME, and number of visits. The first visit contains just one orbit. This visit is chiefly meant to verify our acquisition strategy, Therefore, it would be important to check the first visit's resutls before the rest of the visits are executed. Therefore, the subsequent visits are put on hold. -738809124 ----- Attempting Submission 1 (Tue Jun 30 10:19:01 GMT 2020) ----- ----- Attempting Submission 2 (Wed Dec 02 17:26:42 GMT 2020) ----- HST Phase II Proposal 16182 successfully submitted. Receipt: # 16182-2 ----- Attempting Submission 3 (Wed Dec 02 20:09:08 GMT 2020) ----- Catching wind with the HST: novel UV spectroscopy of a bona fide ultraluminous X-ray source We request 17 orbits to secure for the first time an UV spectrum of a generic ultraluminous X-ray source (ULX). Consisting of an accreting compact object, a neutron star or a black hole, and a non-degenerate donor star, ULXs have highest X-ray luminosities among all types of X-ray binaries. These ultra-high luminosities can be achieved either (1) because of an unusual supercritical regime of accretion, or/and (2) because the black holes have masses exceeding a few tens solar, i.e., in the upper range among those detected by gravitational wave observatories. Advances in X-ray astronomy have already proven that supercritically accreting systems indeed exist among the ULX population. Herewith, we request UV spectroscopy to probe the second scenario and establish the existence of ULXs consisting of heavy black holes in a close orbit around a very massive star. ULXs have a broad spectral energy distribution, from X-rays to UV to optical. They are well studied in X-rays, while optical spectra are secured for about ten ULXs. However, no UV spectrum of an ULX exists yet. We propose to close this gap by obtaining a high-quality UV spectrum of the bona fide ULX, Ho II X-1. Our target is the closest among the generic group of those ULXs which show Wolf-Rayet spectra in the optical. The COS spectra will test whether we observe the donor star or the accretion disk wind. Securing the first UV spectrum of a typical ULX is also necessary to gauge the models of the Universe re-ionization which incorporate ULXs as important feedback agents. The UV spectroscopy of an ULX is a necessary addition to the HST UV legacy. Our target is an ultraluminous X-ray source, which was first discovered in X-rays. The target is located in the galaxy Ho II in a relatively crowded field which was imaged by the HST. (1) Coordinates The science target coordinates are from the The Pan-STARRS release 1 (PS1) Survey - DR1. The coordinates were verified with the optical images; they are consistent with the images in ACS WFC1 F550M MJD#53763.1819. The coordinates are 0.4 arcsec away from the Chandra coordinates of the X-ray source. Neither optical nor X-ray star coordinates are consistent with the images ACS SBC F165LP MJD#54066.3627' or with the HST source catalog coordinates. We believe that this is because of the `` astrometric errors due to imperfect fits to GAIA stars during post-processing. 2) Acquisition There are two nearby stars, approx 0.8 arcsec away from our targtet, however the target is birghter in the UV and optical. We were not able to find a UV bright star with GAIA coordinates which we could use for acquisition. Therefore, after discussion with the support scientist, we decided to proceed with the Acq using imaging. Can you please look at this, do we need to use ACQ/SEARCH? The APT gives warning without it. 3) Orient constrain. Because of the other two stars within the COS aperture, we request orient constrain. The line between the Star1 and the science target has position angle 5deg (from north via east). Intended dispersion direction: 90deg against this, i.e. 95deg or 275deg Following the document: https://hst-docs.stsci.edu/display/HPIOM/6.2.2++Target+Orientation+Visit-level+Special+Requirements COS is mounted such that one has to add 45deg to get the ORIENT angle, i.e.: 140deg or 320deg Allowing for +- 30deg from the ideal ORIENT results in: 110 -- 170 deg or 290 - 350 deg Can you please confirm that these are correct considerations? (4) Visits We were allocated 17 orbits. We split the program to 5 visits, where the first visit is only one orbit and is mainly to verify the aquisition strategy. The acquisition is performed only during the first orbit of each visit. Can you please verify that this is a sensible strategy? (5) Buffer-time We are observing a faint source, therefore buffer time is large (> 20 000 sec) . To optimaize observaitons, we choose buffer-time 3200 sec, can you please verify that thst this is sensible. The team consists of experts in all subjects relevant for the proposal. Drs. D. Massa is a leading expert in the UV spectroscopy. Dr. Gies is the leading expert in optical/UV observations of X-ray binaries. Drs. T. Shenar, A. Sander, L. Oskinova, V. Ramachandran have large experience with studies of massive stars, massive binaries, and high-mass X-ray binaries. Dr. Bulik is an expert in massive binary star evolution. Drs. E. Bozzo and J. M. Torrejon are the experts in accretion and high-mass X-ray binaries. The primary modeling tools for the analysis of the observations will be the PoWR non-LTE stellar atmosphere model which is actively used for the analysis of High-Mass X-ray Binaries. This stellar atmosphere model is developed by the team members. The recent publications of our team members include: High-mass X-ray binaries: illuminting the pasage from massive binaries to merging compact objects. Proceedings of the IAU Symposium 346, Edited by L. Oskinova, E. Bozzo, T. Bulik, D. Gies Cambridge University Press 2020. Hainich, R.; Oskinova, L. M.; Torrejon, J. M., et al., 2020 A&A, 634, 49 The stellar and wind parameters of six prototypical HMXBs and their evolutionary status Shenar, T.; Sablowski, D. P.; Hainich, R.; et al. 2020, A&A 627, 151 The Wolf-Rayet binaries of the nitrogen sequence in the Large Magellanic Cloud Sander, A. A. C.; Vink, J. S.; Hamann, W. -R. 2020, A&A 491, 4406 Driving classical Wolf-Rayet winds: a Eddington factor- and metallicity -dependent mass-loss The LIGO Scientific Collaboration; the Virgo Collaboration; (including E. Bozzo and T. Bulik) 2020arXiv20010176, GW190425: Observation of a Compact Binary Coalescence with Total Mass 3.4 Msun Massa, D., Oskinova, L., Prinja, R., et al. 2019, ApJ 873, 81 Coordinated UV and X-Ray Spectroscopic Observations of an O-type Giant Abbott, B. P. et al. (including E. Bozzo and T. Bulik) 2017ApJ, 848, 12 Multi-messenger Observations of a Binary Neutron Star Merger Stellar Physics and Stellar Types Galaxies 6 false false true false false false false SUPPORTED STAR GIANT O NO This object was generated by the targetselector and retrieved from the SIMBAD database. HOLMBERG-II-X-1 HOLMBERG-II-ULX1 J2000 J2000 COS/FUV Spectroscopic No No G140L 1105 /private/var/folders/z3/xy_g1v_s5fz9yrhzb8thz4cr0001qc/T/OPVisit11650775332672131480.xml Timing link suitability includes constraints ([02 After 01 by 17.0 to 90.0 days] [03 After 01 by 17.0 to 90.0 days] [04 After 01 by 17.0 to 90.0 days] [05 After 01 by 17.0 to 90.0 days]) Hst Same orient constraint links visits (01 02 03 04 05) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16182 :visit-id "01" :proposal-version -1 :trans-version "20200619" :date "03-Dec-2020 13:10:40.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87168 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16182 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16182 :visit-id "01" :orbit-number 1 :pcs-time 393 :si-vis-utilization 3129 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) true 1 0 /private/var/folders/z3/xy_g1v_s5fz9yrhzb8thz4cr0001qc/T/OPVisit17758614564571633637.xml Timing link suitability includes constraints ([02 After 01 by 17.0 to 90.0 days]) Hst Same orient constraint links visits (01 02 03 04 05) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16182 :visit-id "02" :proposal-version -1 :trans-version "20200619" :date "03-Dec-2020 13:10:41.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 313184 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16182 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16182 :visit-id "02" :orbit-number 1 :pcs-time 393 :si-vis-utilization 3132 :al-overhead-at-end 0 :internal-dur-at-end 95 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16182 :visit-id "02" :orbit-number 2 :pcs-time 392 :si-vis-utilization 3133 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16182 :visit-id "02" :orbit-number 3 :pcs-time 392 :si-vis-utilization 3133 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16182 :visit-id "02" :orbit-number 4 :pcs-time 392 :si-vis-utilization 3133 :al-overhead-at-end 0 :internal-dur-at-end 407 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) true 4 0 We need a quick look on the the image and the low S/N spectrum obtained in Visit 1 to ensure that our acqusition strategy is working well. /private/var/folders/z3/xy_g1v_s5fz9yrhzb8thz4cr0001qc/T/OPVisit12242640443597670649.xml Timing link suitability includes constraints ([03 After 01 by 17.0 to 90.0 days]) Hst Same orient constraint links visits (01 02 03 04 05) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16182 :visit-id "03" :proposal-version -1 :trans-version "20200619" :date "03-Dec-2020 13:10:42.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 313184 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16182 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16182 :visit-id "03" :orbit-number 1 :pcs-time 393 :si-vis-utilization 3132 :al-overhead-at-end 0 :internal-dur-at-end 95 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16182 :visit-id "03" :orbit-number 2 :pcs-time 392 :si-vis-utilization 3133 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16182 :visit-id "03" :orbit-number 3 :pcs-time 392 :si-vis-utilization 3133 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16182 :visit-id "03" :orbit-number 4 :pcs-time 392 :si-vis-utilization 3133 :al-overhead-at-end 0 :internal-dur-at-end 407 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) true 4 0 We need a quick look on the the image and the low S/N spectrum obtained in Visit 1 to ensure that our acqusition strategy is working well. /private/var/folders/z3/xy_g1v_s5fz9yrhzb8thz4cr0001qc/T/OPVisit4457433110721742.xml Timing link suitability includes constraints ([04 After 01 by 17.0 to 90.0 days]) Hst Same orient constraint links visits (01 02 03 04 05) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16182 :visit-id "04" :proposal-version -1 :trans-version "20200619" :date "03-Dec-2020 13:10:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 313184 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16182 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16182 :visit-id "04" :orbit-number 1 :pcs-time 393 :si-vis-utilization 3132 :al-overhead-at-end 0 :internal-dur-at-end 95 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16182 :visit-id "04" :orbit-number 2 :pcs-time 392 :si-vis-utilization 3133 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16182 :visit-id "04" :orbit-number 3 :pcs-time 392 :si-vis-utilization 3133 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16182 :visit-id "04" :orbit-number 4 :pcs-time 392 :si-vis-utilization 3133 :al-overhead-at-end 0 :internal-dur-at-end 407 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) true 4 0 We need a quick look on the the image and the low S/N spectrum obtained in Visit 1 to ensure that our acqusition strategy is working well. /private/var/folders/z3/xy_g1v_s5fz9yrhzb8thz4cr0001qc/T/OPVisit18080536379634020232.xml Timing link suitability includes constraints ([05 After 01 by 17.0 to 90.0 days]) Hst Same orient constraint links visits (01 02 03 04 05) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16182 :visit-id "05" :proposal-version -1 :trans-version "20200619" :date "03-Dec-2020 13:10:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 313184 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16182 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16182 :visit-id "05" :orbit-number 1 :pcs-time 393 :si-vis-utilization 3132 :al-overhead-at-end 0 :internal-dur-at-end 95 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16182 :visit-id "05" :orbit-number 2 :pcs-time 392 :si-vis-utilization 3133 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16182 :visit-id "05" :orbit-number 3 :pcs-time 392 :si-vis-utilization 3133 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16182 :visit-id "05" :orbit-number 4 :pcs-time 392 :si-vis-utilization 3133 :al-overhead-at-end 0 :internal-dur-at-end 407 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3525 :pcs-gap 0 ) true 4 0 We need a quick look on the the image and the low S/N spectrum obtained in Visit 1 to ensure that our acqusition strategy is working well.