15464( 7) - 18-Sep-2018 14:28:25 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15464 Version: 7 Check-in Time: 18-Sep-2018 14:28:25 STScI Edit Number: 3 Title Resolving the Stellar Histories of Herschel-Red Dusty Star Forming Galaxies at z~4 ------------------------------------------------------------------------------------ Type Cycle GO 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Arianna Brown University of California - Irvine Y CoI: Prof. Asantha R Cooray University of California - Irvine N CoI: Dr. Jingzhe Ma University of California - Irvine N CoI: Dr. Hooshang Nayyeri University of California - Irvine N CoI: Dr. David Clements Imperial College of Science Technology and N Medicine CoI: Dr. Duncan Farrah University of Hawaii N CoI: Dr. Seb Oliver University of Sussex N CoI: Dr. Ismael Perez-Fournon Instituto de Astrofisica de Canarias N CoI: Dr. Dominik A. Riechers Cornell University N CoI: Dr. Julie Wardlow Durham Univ. N ------------------------------------------------------------------------------------ Abstract We have identified a sample of eight z~4 objects from a new class of powerful high-redshift dusty, star forming galaxies through their rising Herschel SPIRE flux densities and spectroscopic redshifts. A complete, multiwavelength analysis of these objects would increase the sample size of known z~4 SPIRE 'red' starbursts with accurate stellar mass profiles more than two times over, helping to bridge the evolutionary gap between z~2 and z~6 DSFGs, and between high redshift starburst galaxies and their massive 'red-and-dead' counterparts at z=1-2. The deep rest-frame optical observations required for the stellar mass estimates of these galaxies has not yet been observed. Moreover, we recently obtained deep corresponding IRAC images that show clear counterparts to the starbursts, but the true nature of this near-IR emission is elusive due to the blended IRAC image. With the large IRAC PSF, we cannot determine if the near-IR emission is in fact a massive lensing foreground galaxy, or indeed the rest-frame optical emission of the high-z star-forming galaxy(s). We also now have complementary high-resolution ALMA images that suggest complex structures and/or multiple objects are creating the extreme far-IR intensities. To fully understand the nature of these structures, we must understand both their stellar mass and dust mass distributions, the former of which requires high resolution WFC3 observations to de-blend, and potentially de-magnify, the IRAC images. The proposed high resolution WFC3 F125W imaging of each object is crucial to resolve IRAC counterparts, extend individual SEDs into the rest-frame optical regime, and measure more reliable stellar masses than ever before. ------------------------------------------------------------------------------------ Observations Description ------------------------ The goal of this program is to (a) detect and characterize the profile of any potential foreground lensing galaxy or galaxies, and/or (b) measure the rest-frame UV emission of z~4 dusty, starforming galaxies (DSFGs). HST data will also be used to de-blend/resolve the detected Spizter IRAC flux into the 15464( 7) - 18-Sep-2018 14:28:25 - [ 2] appropriate components, using gravitational lensing source plane reconstruction tools where necessary. Combined, these measurements will inform the optical/UV end of the DSFG spectral energy distributions, thereby constraining their stellar masses, gas masses and mass to light ratios. To achieve these goals, we will use the WFC3 F125W band with an integration time of 48 minutes per target to achieve a S/N > 5 (WFC3IR.im.1155145), including a four-point dither pattern to better sample the PSF. This integration time is sufficiently long to capture a potential z = 1-2 foreground lensing elliptical galaxy at a S/N > 10. In ALMA imaging, the morphologies of each of the eight z~4 sources is different, with typical dust emission extending about 1 arcsec in diameter across. ------------------------------------------------------------------------------------ 15464( 7) - 18-Sep-2018 14:28:25 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SMG1 GALAXY, HIGH REDSHIFT RA=00H03M7.1750S, J2000 Z = 21.2 (AB; IRAC CH1) GALAXY, INTERACTING DEC=-33D02'50.87" 4.425 GALAXY, STARBURST Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 SMG2 GALAXY, GRAVITATIONAL RA=00H06M7.5250S, J2000 Z = 20.5 (AB; IRAC CH1) LENS, HIGH REDSHIFT DEC=-32D26'39.64" 4.242 GALAXY, INTERACTING GALAXY, STARBURST Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 10 SMG2-COPY GALAXY, GRAVITATIONAL RA=00H06M7.5250S, J2000 Z = 20.5 (AB; IRAC CH1) LENS, HIGH REDSHIFT DEC=-32D26'39.64" 4.242 GALAXY, INTERACTING GALAXY, STARBURST Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 SMG3 GALAXY, HIGH REDSHIFT RA=00H22M20.8010S, J2000 Z = 20.0 (AB; IRAC CH1) GALAXY, INTERACTING DEC=-01D55'20.88" 5.161 GALAXY, STARBURST Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 4 SMG4 GALAXY, HIGH REDSHIFT RA=00H27M37.3680S, J2000 Z = 19.6 (AB; IRAC CH1) GALAXY, PROTOGALAXY DEC=-02D07'58.63" 3.798 Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 9 SMG4-COPY GALAXY, HIGH REDSHIFT RA=00H27M37.3680S, J2000 Z = 19.6 (AB; IRAC CH1) GALAXY, PROTOGALAXY DEC=-02D07'58.63" 3.798 Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 5 SMG5 GALAXY, HIGH REDSHIFT RA=00H42M23.5100S, J2000 Z = 22.6 (AB; IRAC CH1) GALAXY, INTERACTING DEC=-33D43'23.27" 4.002 GALAXY, STARBURST Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 6 SMG6 GALAXY, HIGH REDSHIFT RA=04H36M57.0148S, J2000 Z = 19.6 (AB; IRAC CH1) GALAXY, INTERACTING DEC=-54D38'9.08" 5.655 GALAXY, STARBURST Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 7 SMG7 GALAXY, HIGH REDSHIFT RA=08H49M36.7972S, J2000 Z = 4.53 22.7 (AB; IRAC CH1) GALAXY, STARBURST DEC=+00D14'54.47" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 8 SMG8 GALAXY, GRAVITATIONAL RA=09H00M45.8318S, J2000 Z = 18.5 (AB; IRAC CH1) LENS, HIGH REDSHIFT DEC=+00D41'23.16" 6.027 GALAXY, STARBURST Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 15464( 7) - 18-Sep-2018 14:28:25 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.636 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 41.788 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 15464( 7) - 18-Sep-2018 14:28:25 - [ 5] Visit: 01 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 SMG1 WFC3/IR MULTIAC IR F125W SAMP-SEQ=SPARS50, NSAMP=14 1 DEF PATTERN 1 1 CUM (2611.753 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 | ------------------------------------------------------------------------------------------------------------------------------------ SMG1 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SMG1 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SMG1 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM SMG1 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15464( 7) - 18-Sep-2018 14:28:25 - [ 6] Visit: 02 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 SMG2 WFC3/IR MULTIAC IR F125W SAMP-SEQ=SPARS50, NSAMP=14 1 DEF PATTERN 1 1 CUM (2611.753 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 | ------------------------------------------------------------------------------------------------------------------------------------ SMG2 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SMG2 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SMG2 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM SMG2 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15464( 7) - 18-Sep-2018 14:28:25 - [ 7] Visit: 03 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 SMG3 WFC3/IR MULTIAC IR F125W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 CUM (2611.753 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 | ------------------------------------------------------------------------------------------------------------------------------------ SMG3 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SMG3 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SMG3 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM SMG3 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15464( 7) - 18-Sep-2018 14:28:25 - [ 8] Visit: 04 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 SMG4 WFC3/IR MULTIAC IR F125W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 CUM (2611.753 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 | ------------------------------------------------------------------------------------------------------------------------------------ SMG4 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SMG4 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SMG4 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM SMG4 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15464( 7) - 18-Sep-2018 14:28:25 - [ 9] Visit: 05 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 SMG5 WFC3/IR MULTIAC IR F125W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 CUM (2611.753 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 | ------------------------------------------------------------------------------------------------------------------------------------ SMG5 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SMG5 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SMG5 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM SMG5 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15464( 7) - 18-Sep-2018 14:28:25 - [ 10] Visit: 06 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 SMG6 WFC3/IR MULTIAC IR F125W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 CUM (2611.753 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 | ------------------------------------------------------------------------------------------------------------------------------------ SMG6 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SMG6 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SMG6 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM SMG6 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15464( 7) - 18-Sep-2018 14:28:25 - [ 11] Visit: 07 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 SMG7 WFC3/IR MULTIAC IR F125W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 CUM (2611.753 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 | ------------------------------------------------------------------------------------------------------------------------------------ SMG7 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SMG7 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SMG7 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM SMG7 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15464( 7) - 18-Sep-2018 14:28:25 - [ 12] Visit: 08 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 SMG8 WFC3/IR MULTIAC IR F125W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 CUM (2611.753 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 | ------------------------------------------------------------------------------------------------------------------------------------ SMG8 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SMG8 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SMG8 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM SMG8 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15464( 7) - 18-Sep-2018 14:28:25 - [ 13] Visit: 09 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 SMG4-COPY WFC3/IR MULTIAC IR F125W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 CUM (2611.753 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 | ------------------------------------------------------------------------------------------------------------------------------------ SMG4-COPY 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SMG4-COPY 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SMG4-COPY 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM SMG4-COPY 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15464( 7) - 18-Sep-2018 14:28:25 - [ 14] Visit: 10 (Visit 10) 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 SMG2-COPY WFC3/IR MULTIAC IR F125W SAMP-SEQ=SPARS50, NSAMP=14 1 DEF PATTERN 1 1 CUM (2611.753 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 | ------------------------------------------------------------------------------------------------------------------------------------ SMG2-COPY 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SMG2-COPY 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SMG2-COPY 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM SMG2-COPY 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15464( 7) - 18-Sep-2018 14:28:25 - [ 15] Summary Form for Proposal 15464 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=14, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F125W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SMG1, SMG2, SMG2-COPY, SMG3, SMG4, SMG4-COPY, SMG5, SMG6, SMG7, SMG8 ------------------------------------------------------------------------------------------------------------------------------------