0 Assigned ID: 3980 ----- Attempting Submission 1 (Fri May 19 23:15:31 GMT 2023) ----- HST Phase I Proposal 3980 successfully submitted. Receipt: # 3980-1 ----- Attempting Submission 2 (Mon May 22 14:47:41 GMT 2023) ----- HST Phase I Proposal 3980 successfully submitted. Receipt: # 3980-2 ----- Attempting Submission 3 (Wed May 24 19:54:05 GMT 2023) ----- HST Phase I Proposal 3980 successfully submitted. Receipt: # 3980-3 ----- Attempting Submission 4 (Wed May 24 21:16:08 GMT 2023) ----- ORBITAL VISIBILITY OVERRUN ORBITAL VISIBILITY OVERRUN ORBITAL VISIBILITY OVERRUN ORBITAL VISIBILITY OVERRUN 0 ----- Attempting Submission 1 (Mon Sep 04 20:35:11 GMT 2023) ----- ----- Attempting Submission 2 (Mon Nov 18 19:41:10 GMT 2024) ----- No changes were made to Visit 01 and 07. Ther are identical to when the Phse II was submitted in September 2023. Visit 06 was adjusted to improve scheduling. Timescales of Stellar Feedback in Blue Galaxies: Critical Parameters for Galaxy Evolution Stellar feedback is fundamental to modern models of galaxy evolution as it drives turbulence and outflows in galaxies, disrupts and triggers star formation events, and redistributes metals formed in stars. To empirically constrain the impact of stellar feedback, an understanding of the timescales involved is critical. We propose to measure the timescale over which stellar feedback drives turbulent motion in the multi-phase interstellar medium by comparing star formation histories - derived from resolved stars - to atomic and ionized gas motions on local scales across the disk of several nearby galaxies. For these spatially resolved studies, we selected 3 extremely blue, low-mass galaxies, each of which demonstrate key features for untangling the timescales involved. As part of our analysis, we will determine if stellar feedback impacts different phases of the ISM on different timescales and if there are galaxy parameters that alter the relationship. We will place constraints for simulations to model accurately this fundamentally important process and whether the implementation of dissipation and cooling can recreate the observed timescales. Each of the 3 targets will be observed for 2 orbits with both primary and parallel observations. We use a 3 point dither pattern based on the first 3 points in the ACS-WFC-DITHER-BOX designed for the UDF observations to reject cosmic rays and handle hot pixels. This dither is 2.5x3 pixels, than 3x1.5 pixels and implemented using pos-targ. The first pointing is executed in both the F814W and F606W for both the primary and parallel observations. After the first dither, 1 exposure is taken in the F606W filter for both ACS and WFC3 before occulation. At the start of the second orbit, the second exposure in the F814W filter is taken for both the primary and secondary observations. After the second dither, the final pointing is executed in both the F814W and F606W for both the primary and parallel observations. The exposre times in the 2 orbit visits are split roughly equally in the two filters. Each visit is 2-orbits. We have placed ORIENT constraints to ensure we maximize coverage of the stellar disks and avoid the galaxy centers falling in the ACS chip gap. Additionally, the ORIENT constraints were chosen to avoid bright stars in both the parallel and primary field-of-views. If HST has to operate on a reduced gyros with reduce field of regard, our current orient requirements may not schedulable. In this case, we could explore if any other orients are possible. We have chosen the submitted orients to maximize the number of scheduling days, but it is possible there are a few additional orients that are viable. Our program is led by Laura Congreve Hunter as a follow-up to her dissertation research on the turbulent ISM of low mass galaxies. Her expertise on measuring the ionized and atomic gas kinematics is critical to the overall science goals of this program. Dr. Rogen Cohen has expertise working with HST ACS imaging data, CMD fitting techniques, and resolved stellar population analysis. Dr. Kristen McQuinn is an expert in star-forming low-mass galaxies, and star formation driven galaxy evolution. Dr. Andrew Dolphin is the developer of the DOLPHOT photometry package and CMD fitting technique to be used in the analysis. Dr. Liese van Zee is a leader in studies of neutral gas, star formation, chemical evolution, and stellar evolution of low-mass galaxies. Galaxies Stellar Populations and the Interstellar Medium 6 false false false false false false false SUPPORTED GALAXY DISK MAGELLANIC IRREGULAR STAR FORMING REGION This object was generated by the targetselector and retrieved from the SIMBAD database. UGC8188 J2000 J2000 GALAXY DISK MAGELLANIC IRREGULAR STAR FORMING REGION STARBURST This object was generated by the targetselector and retrieved from the SIMBAD database. VII-ZW403 J2000 J2000 GALAXY DISK MAGELLANIC IRREGULAR STAR FORMING REGION This object was generated by the targetselector and retrieved from the SIMBAD database. UGC07866 DDO141 J2000 J2000 ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F814W The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 3265 1770494279000 265.03839135387625 (Tic-Visit :proposal-id 17432 :visit-id "01" :proposal-version -1 :trans-version "20240604" :date "18-Nov-2024 14:35:12.0" :trans-errors '(:WARNINGS 2 :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 3437840 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17432 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17432 :visit-id "01" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2796 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3039 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17432 :visit-id "01" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2785 :al-overhead-at-end 116 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3039 :pcs-gap 0 ) true 2 2 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 3265 1767212783000 273.77714074704727 (Tic-Visit :proposal-id 17432 :visit-id "06" :proposal-version -1 :trans-version "20240604" :date "18-Nov-2024 14:32:00.0" :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 3437840 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17432 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17432 :visit-id "06" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2659 :al-overhead-at-end 80 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3039 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17432 :visit-id "06" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2659 :al-overhead-at-end 0 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3039 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. /System/Volumes/Data/solaris/user1/mdocher/hst-work/OP-cache/17432-v07.xml 1734236846000 263.0 (Tic-Visit :proposal-id 17432 :visit-id "07" :proposal-version -1 :trans-version "20241217" :date "29-Jan-2025 16:50:01.0" :trans-errors '(:WARNINGS 2 :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 3437840 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17432 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17432 :visit-id "07" :orbit-number 1 :pcs-time 380 :si-vis-utilization 3121 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3218 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17432 :visit-id "07" :orbit-number 2 :pcs-time 380 :si-vis-utilization 3112 :al-overhead-at-end 116 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3218 :pcs-gap 0 ) true 2 2 /System/Volumes/Data/solaris/user1/mdocher/hst-work/OP-cache/17432-v70.xml 1766372265000 263.0 (Tic-Visit :proposal-id 17432 :visit-id "70" :proposal-version -1 :trans-version "20250929" :date "25-Feb-2026 11:09:25.0" :trans-errors '(:WARNINGS 3 :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 3437840 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17432 :visit-id "70" :obset-id "70" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17432 :visit-id "70" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2835 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17432 :visit-id "70" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2834 :al-overhead-at-end 108 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 2 2 /System/Volumes/Data/solaris/user1/mdocher/hst-work/OP-cache/17432-v71.xml The scheduling data was generated by CASM 34.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 17432 :visit-id "71" :proposal-version -1 :trans-version "20250929" :date "25-Feb-2026 11:18:45.0" :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 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17432 :visit-id "71" :obset-id "71" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17432 :visit-id "71" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2770 :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 3152 :pcs-gap 0 ) true 1 0