0 Assigned ID: 169 ----- Attempting Submission 1 (Wed Mar 04 18:46:57 GMT 2020) ----- HST Phase I Proposal 169 successfully submitted. Receipt: # 169-1 ----- Attempting Submission 2 (Fri Mar 06 19:27:02 GMT 2020) ----- FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser To resolve the guiding star issue, I updated the roll angles and POS TARGs for visits 57 and 58 (observations of UGC 8091) following Christian's suggestions to make the target observed in Mid July 1983149082 ----- Attempting Submission 1 (Tue Jun 30 11:44:11 GMT 2020) ----- ----- Attempting Submission 2 (Tue Jun 30 20:39:35 GMT 2020) ----- ----- Attempting Submission 3 (Mon Jul 06 19:04:01 GMT 2020) ----- ----- Attempting Submission 4 (Wed Jul 08 03:15:45 GMT 2020) ----- ----- Attempting Submission 5 (Wed Sep 23 07:34:11 GMT 2020) ----- ----- Attempting Submission 6 (Mon Jan 11 22:19:25 GMT 2021) ----- ----- Attempting Submission 7 (Thu Jun 24 15:54:47 GMT 2021) ----- These warnings come from making the background image to be 20 e-/pix. Probing the Sources of Reionization: First Measurement of the Escape Fraction of Ionizing Photons in Dwarf Galaxies Fainter than Muv = -13 The observed rest-frame ultraviolet luminosity function (UV LF) of star-forming galaxies at z > 6 suggests that numerous low mass galaxies were responsible for reionizing the Universe by z~6. In the current reionization models, however, the required escape fraction of ionizing photons (fesc) significantly depends on the faint-end limiting magnitude of the UV LF. Unfortunately, there are no observational constraints on fesc in this UV-faint regime; all galaxies with fesc measurements are brighter than Muv = -16. Thus, constraining fesc for galaxies around the fiducial limiting magnitude (Muv = -13) are crucial to understand the role of faint galaxies in cosmic reionization, but they are too faint to be observed at z > 7 even with JWST. We propose to obtain multi-wavelength HST imaging of two nearby, metal-poor starburst dwarf galaxies (UGC 8091 and UGCA 292) that are fainter than Muv = -13. With these observations, we will: (1) measure the global escape fraction for galaxies below the limiting magnitude for the first time using their resolved stars; (2) map the local escape fraction in each galaxy; and (3) explore the relation between local escape fraction and physical environments. Establishing the relationships between local escape fraction and physical properties will greatly improve our understanding on the mechanisms for escape of ionizing photons. Furthermore, those relationships can be used to infer the escape fractions of high-z galaxies that can not be resolved, but with measured physical galactic properties. As a pilot program, we will pave the way to probe the contribution of extreme UV-faint dwarf galaxies to cosmic reionization. The archival UV imaging with WFC3/UVIS (from GO-15275) for both galaxies have depth to detect intermediate B-type main-sequence (MS) stars (MV = -0.5) with signal-to-noise ratio (SNR) > 5 in F275W and F336W. Since 99% of ionizing photons are produced by MS stars hotter than early B-type, requesting the same depth in new F225W observations to detect intermediate B-type stars with SNR > 5 will assure detection of most hot ionizing stars even if some of them suffer from significant amount of dust extinction. We also request to obtain WFC3/IR observations of UGC 8091 for directly observing intermediate B-type stars with SNR > 5 in F110W and F160W. Our narrow-band observations (Ha, Hb, [OIII], and [OII]) to study the ISM are designed to produce compatible SNRs to those for NGC 4214 from the previous program (GO-11360). We take medium-band imaging in F621M for continuum subtraction at Ha. The PI, Yumi Choi, is an expert in stellar populations and the ISM in nearby galaxies. Dr. Choi has developed a new method to map the escape fraction of ionizing photons using resolved stellar populations, and successfully applied the method to an excellent local analog of high redshift star-forming dwarf galaxies, NGC 4214. Our team consists of experts in resolved stellar populations and star formation in nearby dwarf galaxies (Drs. Dalcanton, Skillman, Williams, Olsen, Weisz, Gilbert, Choi), dusty ISM (Drs. Gordon, Sandstrom, Dalcanton), and cosmic reionization (Drs. Weisz, Choi). We have many experience with large HST surveys of resolved stellar populations (e.g., ANGST, PHAT, ANGRRR, SMIDGE, METAL) and running BEAST (the stellar SED fitter) and MATCH (the CDM fitter) on those multi-band photometry datasets. Our team has a well-tested HST photometry pipeline, and all the analysis tools for this study already exists. Galaxies Stellar Populations and the Interstellar Medium 6 false false true false false false false SUPPORTED GALAXY STARBURST This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 GALAXY STARBURST This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 WFC3/UVIS Imaging No No F225W WFC3/UVIS Imaging No No F373N WFC3/UVIS Imaging No No F487N WFC3/UVIS Imaging No No F502N WFC3/UVIS Imaging No No F656N WFC3/UVIS Imaging No No F225W WFC3/UVIS Imaging No No F373N WFC3/UVIS Imaging No No F487N WFC3/UVIS Imaging No No F502N WFC3/UVIS Imaging No No F656N WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W Hst Same orient constraint links visits (01 02 03 05) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. 1610811558000 274.0 (Tic-Visit :proposal-id 16292 :visit-id "01" :proposal-version -1 :trans-version "20200619" :date "23-Sep-2020 03:03:54.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1443728 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16292 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16292 :visit-id "01" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2797 :al-overhead-at-end 129 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16292 :visit-id "01" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2788 :al-overhead-at-end 126 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 2 0 Hst Same orient constraint links visits (01 02 03 05) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. 1610788689000 274.0 (Tic-Visit :proposal-id 16292 :visit-id "02" :proposal-version -1 :trans-version "20200619" :date "23-Sep-2020 03:03:55.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16292 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16292 :visit-id "02" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2796 :al-overhead-at-end 126 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 1 0 Hst Same orient constraint links visits (01 02 03 05) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. 1610468520000 274.0 (Tic-Visit :proposal-id 16292 :visit-id "03" :proposal-version -1 :trans-version "20200619" :date "23-Sep-2020 03:03:56.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16292 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16292 :visit-id "03" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2794 :al-overhead-at-end 126 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. 1610885885000 274.0 (Tic-Visit :proposal-id 16292 :visit-id "04" :proposal-version -1 :trans-version "20200619" :date "23-Sep-2020 03:03:58.0" :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 925664 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16292 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16292 :visit-id "04" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2797 :al-overhead-at-end 126 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 1 0 Hst Same orient constraint links visits (01 02 03 05) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. 1612116007000 274.0 (Tic-Visit :proposal-id 16292 :visit-id "05" :proposal-version -1 :trans-version "20200619" :date "23-Sep-2020 03:04:00.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16292 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16292 :visit-id "05" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2795 :al-overhead-at-end 127 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 1 0 Hst Same orient constraint links visits (06 09 10 11 12) The scheduling data was generated by CASM 29.0. CASM was run in Phase II mode. 1621815721000 107.0 (Tic-Visit :proposal-id 16292 :visit-id "06" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 17:07:13.0" :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 1443744 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16292 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16292 :visit-id "06" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2766 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 29.0. 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CASM was run in Phase II mode. /Users/yumi/Research/OP-cache/GO-16292_repeat_UGC8091-v57.xml (Tic-Visit :proposal-id 16292 :visit-id "57" :proposal-version -1 :trans-version "20200619" :date "24-Jun-2021 11:47:12.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1114160 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16292 :visit-id "57" :obset-id "57" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16292 :visit-id "57" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2732 :al-overhead-at-end 0 :internal-dur-at-end 405 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 29.0. 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CASM was run in Phase II mode. /Users/yumi/Research/OP-cache/GO-16292_repeat_UGC8091-v58.xml (Tic-Visit :proposal-id 16292 :visit-id "58" :proposal-version -1 :trans-version "20200619" :date "24-Jun-2021 11:47:13.0" :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 1117168 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16292 :visit-id "58" :obset-id "58" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16292 :visit-id "58" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2766 :al-overhead-at-end 125 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 Hst Same orient constraint links visits (06 09 10 11 12) The scheduling data was generated by CASM 29.0. CASM was run in Phase II mode. 1621965144000 107.0 (Tic-Visit :proposal-id 16292 :visit-id "09" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 17:07:31.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16292 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16292 :visit-id "09" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2763 :al-overhead-at-end 127 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 Hst Same orient constraint links visits (06 09 10 11 12) The scheduling data was generated by CASM 29.0. CASM was run in Phase II mode. 1622302059000 107.0 (Tic-Visit :proposal-id 16292 :visit-id "10" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 17:07:35.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16292 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16292 :visit-id "10" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2766 :al-overhead-at-end 126 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 Hst Same orient constraint links visits (06 09 10 11 12) The scheduling data was generated by CASM 29.0. CASM was run in Phase II mode. 1622216316000 107.0 (Tic-Visit :proposal-id 16292 :visit-id "11" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 17:07:39.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16292 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16292 :visit-id "11" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2766 :al-overhead-at-end 126 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 (Tic-Visit :proposal-id 16292 :visit-id "11" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 17:07:39.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16292 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16292 :visit-id "11" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2766 :al-overhead-at-end 126 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Hst Same orient constraint links visits (06 09 10 11 12) The scheduling data was generated by CASM 29.0. 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