17779( 5) - 08-Nov-2024 15:33:45 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17779 Version: 5 Check-in Time: 08-Nov-2024 15:33:45 STScI Edit Number: 0 Title A massive protocluster at z=4.3 selected by the South Pole Telescope ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Scott C. Chapman University of British Columbia Y CoI: Prof. Daniel Marrone University of Arizona N CoI: Dr. Matthew L. N. Ashby Smithsonian Institution Astrophysical N Observatory CoI: Dr. Axel Weiss Max-Planck-Institut fur Radioastronomie N CoI: Dr. Rebecca E. A. Canning University of Portsmouth N CoI: Prof. Daniel P. Stark University of Arizona N CoI: Dr. Ryley Hill University of British Columbia N CoI: Prof. Justin Spilker Texas A & M University N CoI: Prof. Manuel Aravena Diego Portales University N CoI: Dr. Kedar A Phadke University of Illinois at Urbana - N Champaign CoI: Dr. Christopher Hayward Simons Foundation Center for Computational N Astrophysics CoI: Prof. Joaquin Vieira University of Illinois at Urbana - N Champaign ------------------------------------------------------------------------------------ Abstract We request deep imaging of an SPT-selected protocluster, SPT2349-56 located at z=4.3, using HST and JWST in F435W through F1800W filters. SPT2349 possesses a very large ~10^13 Msun halo mass for any structure at z>4. Selected via millimeter-wavelength dust emission in the 2500 square degree South Pole Telescope (SPT) survey, it has been resolved by ALMA into more than 30 gas-rich galaxies, with a surrounding overdensity of LBGs and LAEs. Sensitive observations of carbon monoxide and ionized carbon with ALMA, allow assessment of the obscured star formation and gas masses of bright cluster members. The goal of this proposal is to obtain HST ACS imaging to uncover the overdensity of faint LBGs, and constrain the extincted UV properties of the SMGs. HST WFC3 + JWST NIRCam/MIRI will be used to measure the stellar properties and galaxy morphologies. The proposed HST+JWST observations leverage HST to minimize this initial JWST required to provide the imaging and photometric information for a complete picture of the obscured and unobscured stellar components of the ALMA galaxies, and the overdensity of LBGs, revealing the structure in the gas-rich galaxies that host rapid star formation and the less luminous galaxies which trace the filaments of an early collapsing structure. The combination of high resolution ALMA datasets with the proposed HST observations will allow a full characterization of the stars, gas, and dust in this cosmologically important protocluster of primordial starburst galaxies. From an outreach perspective, the high spatial resolution of the identifications of protocluster galaxies will complement the ALMA data in publicizing these high impact results. ------------------------------------------------------------------------------------ 17779( 5) - 08-Nov-2024 15:33:45 - [ 2] Observations Description ------------------------ 3 filter ACS observations (g, r, i equivalents for LBG selection) 2 filter WFC3 observations (J and H band equivalents) for SED fitting. observational setup: standard setups to fill orbits in ACS typically NSAMP = 13 and SAMP-SEQ=SPARS50 for WFC3 the various choices of filters: 435w, 606w, 814w in ACS for selecting lyman break galaxies 125w and 160w in WFC3 for SED fitting along with JWST bands at longer wave dither patterns, ACS-WFC-Dither-box and -line to fill available orbits accordingly ------------------------------------------------------------------------------------ 17779( 5) - 08-Nov-2024 15:33:45 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT2349 CLUSTER OF GALAXIES, RA=23H49M42.7800S, J2000 V = 20 HIGH REDSHIFT CLUSTER DEC=-56D38'23.80" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 17779( 5) - 08-Nov-2024 15:33:45 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.262 Line_Spacing 0.192 Coordinate_Frame POS-TARG Pattern_Orient 18.39 Angle_Between_Sides 68.14 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BOX-MIN Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 1.716 Line_Spacing 0.365 Coordinate_Frame POS-TARG Pattern_Orient 18.528 Angle_Between_Sides 74.653 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 4 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 3.034 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.29 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 17779( 5) - 08-Nov-2024 15:33:45 - [ 5] Visit: 14 (SPT2349 ACS f814w) Visit Requirements: On Hold Comments: Additional Comments: 5300s of ACS Pointing of SPT0311 with ditherig Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT2349 ACS/WFC ACCUM WFC F814W 1 25800 S POS TARG 5, -5; PATTERN see below 2 1 (4742 S) Comments: 11000s of ACS Pointing of SPT0311 with dithering ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SPT2349 1 ACS/WFC ACCUM WFC F814W 1 none none none 1 1170.0 S SPT2349 1 ACS/WFC ACCUM WFC F814W 2 none none none 1 1170.0 S SPT2349 1 ACS/WFC ACCUM WFC F814W 3 none none none 2 1201.0 S SPT2349 1 ACS/WFC ACCUM WFC F814W 4 none none none 2 1201.0 S 17779( 5) - 08-Nov-2024 15:33:45 - [ 6] Visit: 15 (SPT2349 ACS f814w) Visit Requirements: On Hold Comments: Additional Comments: 5300s of ACS Pointing of SPT0311 with ditherig Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT2349 ACS/WFC ACCUM WFC F814W 1 25800 S POS TARG 5, -5; PATTERN see below 2 1 (4742 S) Comments: 11000s of ACS Pointing of SPT0311 with dithering ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SPT2349 1 ACS/WFC ACCUM WFC F814W 1 none none none 1 1170.0 S SPT2349 1 ACS/WFC ACCUM WFC F814W 2 none none none 1 1170.0 S SPT2349 1 ACS/WFC ACCUM WFC F814W 3 none none none 2 1201.0 S SPT2349 1 ACS/WFC ACCUM WFC F814W 4 none none none 2 1201.0 S 17779( 5) - 08-Nov-2024 15:33:45 - [ 7] Visit: 17 (SPT2349 ACS f435w) Visit Requirements: On Hold Comments: Additional Comments: 5300s of ACS Pointing of SPT2349 with ditherig Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT2349 ACS/WFC ACCUM WFC F435W 1 25800 S POS TARG 5, -5; PATTERN see below 2 1 (4742 S) Comments: 11000s of ACS Pointing of SPT0311 with dithering ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SPT2349 1 ACS/WFC ACCUM WFC F435W 1 none none none 1 1170.0 S SPT2349 1 ACS/WFC ACCUM WFC F435W 2 none none none 1 1170.0 S SPT2349 1 ACS/WFC ACCUM WFC F435W 3 none none none 2 1201.0 S SPT2349 1 ACS/WFC ACCUM WFC F435W 4 none none none 2 1201.0 S 17779( 5) - 08-Nov-2024 15:33:45 - [ 8] Visit: 18 (SPT2349 ACS f435w) Visit Requirements: On Hold Comments: Additional Comments: 5300s of ACS Pointing of SPT2349 with ditherig Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT2349 ACS/WFC ACCUM WFC F435W 1 25800 S POS TARG 5, -5; PATTERN see below 2 1 (4742 S) Comments: 11000s of ACS Pointing of SPT0311 with dithering ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SPT2349 1 ACS/WFC ACCUM WFC F435W 1 none none none 1 1170.0 S SPT2349 1 ACS/WFC ACCUM WFC F435W 2 none none none 1 1170.0 S SPT2349 1 ACS/WFC ACCUM WFC F435W 3 none none none 2 1201.0 S SPT2349 1 ACS/WFC ACCUM WFC F435W 4 none none none 2 1201.0 S 17779( 5) - 08-Nov-2024 15:33:45 - [ 9] Visit: 19 (SPT2349 ACS f435w) Visit Requirements: On Hold Comments: Additional Comments: 5300s of ACS Pointing of SPT2349 with ditherig Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT2349 ACS/WFC ACCUM WFC F435W 1 25800 S POS TARG 5, -5; PATTERN see below 2 1 (4742 S) Comments: 11000s of ACS Pointing of SPT0311 with dithering ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SPT2349 1 ACS/WFC ACCUM WFC F435W 1 none none none 1 1170.0 S SPT2349 1 ACS/WFC ACCUM WFC F435W 2 none none none 1 1170.0 S SPT2349 1 ACS/WFC ACCUM WFC F435W 3 none none none 2 1201.0 S SPT2349 1 ACS/WFC ACCUM WFC F435W 4 none none none 2 1201.0 S 17779( 5) - 08-Nov-2024 15:33:45 - [ 10] Visit: 20 (SPT2349 ACS f606w) Visit Requirements: On Hold Comments: Additional Comments: 5300s of ACS Pointing of SPT2349 with ditherig Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT2349 ACS/WFC ACCUM WFC F606W 1 25800 S POS TARG 5, -5; PATTERN see below 2 1 (4742 S) Comments: 11000s of ACS Pointing of SPT0311 with dithering ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SPT2349 1 ACS/WFC ACCUM WFC F606W 1 none none none 1 1170.0 S SPT2349 1 ACS/WFC ACCUM WFC F606W 2 none none none 1 1170.0 S SPT2349 1 ACS/WFC ACCUM WFC F606W 3 none none none 2 1201.0 S SPT2349 1 ACS/WFC ACCUM WFC F606W 4 none none none 2 1201.0 S 17779( 5) - 08-Nov-2024 15:33:45 - [ 11] Visit: 22 (WFC3 observations) Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT2349 WFC3/IR MULTIAC IR F125W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 3 1-2 CUM (2611.753 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SPT2349 WFC3/IR MULTIAC IR F125W NSAMP=13, SAMP-SEQ=SPARS50 1 DEF CUM (2411.751 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SPT2349 WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 3 3-4 CUM (2611.753 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SPT2349 WFC3/IR MULTIAC IR F160W NSAMP=13, SAMP-SEQ=SPARS50 1 DEF CUM (2411.751 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SPT2349 WFC3/IR MULTIAC IR F160W NSAMP=13, SAMP-SEQ=SPARS50 1 DEF PATTERN 3 5 CUM (2411.751 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SPT2349 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SPT2349 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SPT2349 1 WFC3/IR MULTIAC IR F125W 3 none none none 2 N/A CUM SPT2349 1 WFC3/IR MULTIAC IR F125W 4 none none none 2 N/A CUM SPT2349 2 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SPT2349 2 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SPT2349 2 WFC3/IR MULTIAC IR F125W 3 none none none 2 N/A CUM SPT2349 2 WFC3/IR MULTIAC IR F125W 4 none none none 2 N/A CUM 17779( 5) - 08-Nov-2024 15:33:45 - [ 12] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SPT2349 3 WFC3/IR MULTIAC IR F160W 1 none none none 3 N/A CUM SPT2349 3 WFC3/IR MULTIAC IR F160W 2 none none none 3 N/A CUM SPT2349 3 WFC3/IR MULTIAC IR F160W 3 none none none 4 N/A CUM SPT2349 3 WFC3/IR MULTIAC IR F160W 4 none none none 4 N/A CUM SPT2349 4 WFC3/IR MULTIAC IR F160W 1 none none none 3 N/A CUM SPT2349 4 WFC3/IR MULTIAC IR F160W 2 none none none 3 N/A CUM SPT2349 4 WFC3/IR MULTIAC IR F160W 3 none none none 4 N/A CUM SPT2349 4 WFC3/IR MULTIAC IR F160W 4 none none none 4 N/A CUM SPT2349 5 WFC3/IR MULTIAC IR F160W 1 none none none 5 N/A CUM SPT2349 5 WFC3/IR MULTIAC IR F160W 2 none none none 5 N/A CUM SPT2349 5 WFC3/IR MULTIAC IR F160W 3 none none none 5 N/A CUM SPT2349 5 WFC3/IR MULTIAC IR F160W 4 none none none 5 N/A CUM 17779( 5) - 08-Nov-2024 15:33:45 - [ 13] Visit: 23 (SPT2349 ACS f814w) Visit Requirements: On Hold Comments: Additional Comments: 5300s of ACS Pointing of SPT0311 with dither - here use a line dither to get final orbit Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT2349 ACS/WFC ACCUM WFC F814W 1 25800 S POS TARG 5, -5; PATTERN see below 4 1 (2336 S) Comments: ACS Pointing of SPT0311 with dithering ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SPT2349 1 ACS/WFC ACCUM WFC F814W 1 none none none 1 1168.0 S SPT2349 1 ACS/WFC ACCUM WFC F814W 2 none none none 1 1168.0 S 17779( 5) - 08-Nov-2024 15:33:45 - [ 14] Visit: 24 (SPT2349 ACS f606w) Visit Requirements: On Hold Comments: Additional Comments: 5300s of ACS Pointing of SPT0311 with dither - here use a line dither to get final orbit Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT2349 ACS/WFC ACCUM WFC F606W 1 25800 S POS TARG 5, -5; PATTERN see below 4 1 (2336 S) Comments: ACS Pointing of SPT0311 with dithering ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SPT2349 1 ACS/WFC ACCUM WFC F606W 1 none none none 1 1168.0 S SPT2349 1 ACS/WFC ACCUM WFC F606W 2 none none none 1 1168.0 S 17779( 5) - 08-Nov-2024 15:33:45 - [ 15] Summary Form for Proposal 17779 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=13, NSAMP=14, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 2 1, PATTERN 3 1-2, PATTERN 3 3-4, PATTERN 3 5, PATTERN 4 1, POS TARG 5, -5 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F125W, F160W, F435W, F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SPT2349 ------------------------------------------------------------------------------------------------------------------------------------