0 Assigned ID: 1662 ----- Attempting Submission 1 (Tue Mar 20 21:15:05 GMT 2018) ----- HST Phase I Proposal 1662 (ClusterAges-Cycle25-Mid.apt) successfully submitted. Receipt: # 1662-1 ----- Attempting Submission 2 (Tue Mar 20 21:30:59 GMT 2018) ----- HST Phase I Proposal 1662 (ClusterAges-Cycle25-Mid.apt) successfully submitted. Receipt: # 1662-2 ----- Attempting Submission 3 (Wed Mar 21 20:01:03 GMT 2018) ----- HST Phase I Proposal 1662 (ClusterAges-Cycle25-Mid.apt) successfully submitted. Receipt: # 1662-3 0 Star Cluster Formation and Evolution in Luminous Galaxy Mergers: A Joint JWST-HST Investigation We propose new F336W observations of all 10 luminous infrared galaxies (LIRGs) in GOALS being observed by JWST as part of our approved ERS program "A JWST Study of the Starburst-AGN Connection in Merging LIRGs" (Armus PI) and as part of GTO campaigns. High-resolution studies of local LIRGs allows us to understand the manner in which star formation in extreme environments differs from that of normal star-forming galaxies, and is also critical for our understanding starbursts in cosmologically distant LIRGs which comprise the bulk of the IR energy density at z > 0.5. These observations allow us to map the distribution of star clusters and NUV emission over the entire extent of each LIRG and, combined with our pre-existing HST and upcoming JWST ERS and GTO datasets, enable the following questions to be answered: 1) Is star formation and cluster disruption in such violent environments fundamentally different than in normal star-forming galaxies? 2) Do star clusters in LIRGs have a characteristic mass consistent with them being the precursors to globular clusters? 3) Are the proximity of young NUV-bright clusters relative to embedded IR-bright star clusters as traced by JWST consistent with the NUV clusters being birthed from these energetic IR starburst regions? I.e., are NUV-bright clusters representative of the imbedded star formation which drives the high IR luminosities of LIRGs? The combined dataset has strong legacy value, and the present study will greatly expand our understanding of star cluster formation and evolution in the most extreme environments, providing one of the clearest pictures to date of the complex galactic ecosystems of local starburst galaxies. HST images will be obtained using the WFC3/UVIS in imaging mode with the broad-band F336W filter. The new observations will be paired with our pre-existing ACS/WFC F435W and F814W observations. The ACS/WFC and WFC3/UVIS cameras have comparable fields of view (202"x202" and 162"x162", respectively), and cover sufficient area to enable observations of these LIRGs in a single pointing. The clusters observed in this sample of LIRGs have M_V= -8 to -16 mag and apparent F435W (B) magnitudes typically in the range B ~ 21-25.5 mag. We have made use of instantaneous starburst models from Bruzual & Charlot (2003) to estimate the observed magnitudes in the F336W filter. For a 100 Myr starburst (F336W - F435W = -0.53 mag) and a conservative apparent magnitude of B=25.5 mag, we find that we can reach a signal-to-noise ratio, SNR, of approximately 13 with F336W in roughly 40 minutes. Note that if the clusters are younger, their spectral energy distributions peak even higher in bluer filters, and are therefore 1-2 magnitudes brighter than described above. Thus, in the absence of dust, the achieved SNR will be significantly higher. We model our observing strategy based on GO 14066 and use a custom 4-pt dither pattern for each source designed to (1) remove the gap between the chips (1.2 arcsec) (2) sub-sample the PSF (half pixel or a third of a pixel shift have been included if the pattern is a multiple of 2 or 3, respectively), and (3) to remove droplets (shift of 4 arcsec required). The 4-pointing pattern has the following coordinates in arcsec: (0,0), (-3.69,1.31), (-2.5, -2.44), (1.19,-3.75). Further, the main body of the galaxy has been placed at the UVIS2-FIX location (which is more sensitive in the UV, and therefore, optimal to detect clusters), or at the UVIS-FIX location in order to fully map the galaxy if it has very extended tidal features (Arp 220, Mrk 231, IC 1623, NGC 3256). The pointing center for NGC 7469 has been shifted slightly away from the galaxy in order to include the companion IC4283 with all possible ORIENT angles to maximize schedule availability. Finally, we utilize the ACCUM mode, and include a FLASH of 9-10 seconds with the CR_SPLIT=NO parameter to mitigate CTE losses. The data reduction and calibration of new and archival data will be done using the standard HST pipeline. IRAF, IDL and python will be used for additional data reduction and photometry within metric apertures. The cluster analysis will be done by using Source Extractor to identify clusters and IDL routines to extract aperture measurements of clusters and calculate luminosities. Similar analysis has been done on the F435W and F814W data (Linden et al. 2017). Folding in the analysis of GOALS data at other wavelengths will complete the interpretation of the HST dataset. Galaxies and the IGM 0 false false false false true false false SUPPORTED GALAXY INTERACTING GALAXY MULTIPLE NUCLEI STARBURST ULTRALUMINOUS IR GAL J2000 J2000 GALAXY INTERACTING GALAXY MULTIPLE NUCLEI STARBURST ULTRALUMINOUS IR GAL J2000 J2000 GALAXY INTERACTING GALAXY MULTIPLE NUCLEI STARBURST ULTRALUMINOUS IR GAL J2000 J2000 GALAXY INTERACTING GALAXY MULTIPLE NUCLEI STARBURST ULTRALUMINOUS IR GAL J2000 J2000 GALAXY INTERACTING GALAXY MULTIPLE NUCLEI STARBURST ULTRALUMINOUS IR GAL J2000 J2000 GALAXY INTERACTING GALAXY QSO STARBURST ULTRALUMINOUS IR GAL J2000 J2000 GALAXY INTERACTING GALAXY MULTIPLE NUCLEI STARBURST ULTRALUMINOUS IR GAL J2000 J2000 GALAXY INTERACTING GALAXY MULTIPLE NUCLEI STARBURST ULTRALUMINOUS IR GAL J2000 J2000 GALAXY INTERACTING GALAXY MULTIPLE NUCLEI STARBURST ULTRALUMINOUS IR GAL J2000 J2000 GALAXY INTERACTING GALAXY MULTIPLE NUCLEI STARBURST ULTRALUMINOUS IR GAL J2000 J2000 WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F336W The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15472 :visit-id "01" :proposal-version -1 :trans-version "20171009" :date "17-May-2018 15:09:18.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15472 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15472 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2869 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15472 :visit-id "02" :proposal-version -1 :trans-version "20171009" :date "17-May-2018 15:09:19.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15472 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15472 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2927 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3260 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15472 :visit-id "03" :proposal-version -1 :trans-version "20171009" :date "17-May-2018 15:09:20.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15472 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15472 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2869 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15472 :visit-id "04" :proposal-version -1 :trans-version "20171009" :date "17-May-2018 13:57:32.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15472 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15472 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2965 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3298 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15472 :visit-id "05" :proposal-version -1 :trans-version "20171009" :date "17-May-2018 13:57:33.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15472 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15472 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2869 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15472 :visit-id "06" :proposal-version -1 :trans-version "20171009" :date "17-May-2018 13:57:33.0" :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 15472 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15472 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3116 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3449 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15472 :visit-id "07" :proposal-version -1 :trans-version "20171009" :date "17-May-2018 15:09:21.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15472 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15472 :visit-id "07" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2927 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3260 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15472 :visit-id "08" :proposal-version -1 :trans-version "20171009" :date "17-May-2018 15:09:13.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15472 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15472 :visit-id "08" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2883 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3216 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15472 :visit-id "09" :proposal-version -1 :trans-version "20171009" :date "17-May-2018 13:55:17.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15472 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15472 :visit-id "09" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2872 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3205 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15472 :visit-id "10" :proposal-version -1 :trans-version "20171009" :date "17-May-2018 13:57:35.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15472 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15472 :visit-id "10" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2884 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3217 :pcs-gap 0 ) false 1 0