14896( 4) - 19-Dec-2016 16:42:14 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14896 Version: 4 Check-in Time: 19-Dec-2016 16:42:14 STScI Edit Number: 0 Title Precise Photometric Redshifts For Two Bright z>8 Galaxies ------------------------------------------------------------------------------------ Type Cycle GO 24 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Matthew Bayliss Massachusetts Institute of Technology Y CoI: Dr. Dan Coe Space Telescope Science Institute - ESA N CoI: Prof. Keren Sharon University of Michigan N CoI: Prof. Michael D. Gladders University of Chicago N CoI: Ms. Traci Lin Johnson University of Michigan N CoI: Mr. Michael Florian University of Chicago N CoI: Dr. Jane R. Rigby NASA Goddard Space Flight Center N CoI: Dr. Haakon Dahle University of Oslo N CoI: Dr. Michael A. McDonald Massachusetts Institute of Technology N ------------------------------------------------------------------------------------ Abstract Deep field observations with the Hubble Space Telescope have revealed several hundred z>8 galaxy candidates in the universe's first billion years, but few if any are bright enough (H<24.5 AB) for detailed, high-S/N spectroscopic follow-up study with the James Webb Space Telescope. With the JWST launch fast-approaching it is essential that we make every attempt to identify as many bright high-z galaxies as possible to feed early science programs. With this is mind, we are proposing for WFC3/IR imaging observations of two exceptionally bright (H~24 AB) candidate z~8-10 dropout galaxies that were only recently identified in September 2016. Both targets are detected in H-band imaging and drop out strongly in blue bands. A preliminary Bayesian photo-z analysis of existing data reveals a a high probability that both sources are z>8, but cannot provide precise photometric redshift constraints. We propose for HST/WFC3 + ACS imaging to obtain the multi-band imaging necessary to recover precise photometric redshifts for these two dropout galaxies. ------------------------------------------------------------------------------------ Observations Description ------------------------ The goal of this proposal is to obtain imaging of two fields in a total of six HST imaging bands, spanning 0.6-1.7 microns, to precisely constrain the photometric redshifts of two bright candidate z>8 galaxies. For one of the candidates we already have archival imaging in three bands, and only require new 2 orbits of WFC3/IR observations. The other candidate requires 2 orbits of WFC3/IR plus one orbit of WCS imaging. We have arranged the observations to fit into two visits, one for each target. If it makes the scheduling easier, however, we could easily split the 3-orbit observation into two visits (2 orbits of WFC3/IR and 1 separate orbit of ACS/WFC). In all of these observations we dither manually between several positions using the POS-TARG field in the special requirements for each exposure. 14896( 4) - 19-Dec-2016 16:42:14 - [ 2] ------------------------------------------------------------------------------------ 14896( 4) - 19-Dec-2016 16:42:14 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT-GALJ0151 GALAXY, HIGH REDSHIFT RA=01H51M26.7000S, J2000 V = 30.0 H=24.0 26-595439-AC GALAXY DEC=-59D54'39.00" S Reference Frame: Other: 2MASS ------------------------------------------------------------------------------------------------------------------------------------ 3 SPT-GALJ0151 GALAXY, HIGH REDSHIFT RA=01H51M26.7000S, J2000 V = 30.0 H=24.0 26-595439-WF GALAXY DEC=-59D54'59.00" C3 Reference Frame: Other: 2MASS ------------------------------------------------------------------------------------------------------------------------------------ 2 SGASJ095237+ GALAXY, HIGH REDSHIFT RA=09H52M37.9000S, J2000 V = 30. H=23.8 343531 GALAXY DEC=+34D35'21.10" Reference Frame: Other: 2MASS ------------------------------------------------------------------------------------------------------------------------------------ 14896( 4) - 19-Dec-2016 16:42:14 - [ 4] Visit: 01 (SPT0151_A) 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 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F160W NSAMP=8, SAMP-SEQ=SPARS50 1 DEF SEQ 1-8 NON-INT 126-595439- CUM (352.935 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F140W NSAMP=7, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 1 126-595439- CUM (302.935 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F125W NSAMP=8, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 2 126-595439- CUM (352.935 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F105W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 3 126-595439- CUM (402.936 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F105W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.30275, 126-595439- CUM (402.936 6.48275 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F160W NSAMP=7, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 5 126-595439- CUM (302.935 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F140W NSAMP=7, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 6 126-595439- CUM (302.935 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F125W NSAMP=8, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 7 126-595439- CUM (352.935 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F160W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.3455, 126-595439- CUM (402.936 -0.47425; SEQ 9-16 WFC3 S) NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 10 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F140W NSAMP=7, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 9 126-595439- CUM (302.935 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 14896( 4) - 19-Dec-2016 16:42:14 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 11 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F125W NSAMP=8, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 10 126-595439- CUM (352.935 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F105W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 11 126-595439- CUM (402.936 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 13 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F105W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.64825, 7.1370 126-595439- CUM (402.936 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 14 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F160W NSAMP=8, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 13 126-595439- CUM (352.935 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 15 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F140W NSAMP=7, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 13 126-595439- CUM (302.935 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 16 SPT-GALJ015 WFC3/IR MULTIAC IR-FIX F125W NSAMP=8, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 13 126-595439- CUM (352.935 WFC3 S) ------------------------------------------------------------------------------------------------------------------------------------ 17 SPT-GALJ015 ACS/WFC ACCUM WFC-FIX F814W 1 350 S SEQ 17-22 NON-INT 126-595439- see below ACS (343 S) ------------------------------------------------------------------------------------------------------------------------------------ 18 SPT-GALJ015 ACS/WFC ACCUM WFC-FIX F814W 1 350 S POS TARG 0.247, 2.984 126-595439- see below ACS (343 S) ------------------------------------------------------------------------------------------------------------------------------------ 19 SPT-GALJ015 ACS/WFC ACCUM WFC-FIX F814W 1 350 S POS TARG 0.494, 5.968 126-595439- see below ACS (343 S) ------------------------------------------------------------------------------------------------------------------------------------ 20 SPT-GALJ015 ACS/WFC ACCUM WFC-FIX F606W 1 350 S SAME POS AS 19 126-595439- see below ACS (343 S) ------------------------------------------------------------------------------------------------------------------------------------ 21 SPT-GALJ015 ACS/WFC ACCUM WFC-FIX F606W 1 350 S SAME POS AS 18 126-595439- see below ACS (343 S) ------------------------------------------------------------------------------------------------------------------------------------ 22 SPT-GALJ015 ACS/WFC ACCUM WFC-FIX F606W 1 350 S SAME POS AS 17 126-595439- see below ACS (343 S) 14896( 4) - 19-Dec-2016 16:42:14 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SPT-GALJ015126-5954 1 WFC3/IR MULTIAC IR-FIX F160W none none none none 1 N/A 39-WFC3 CUM SPT-GALJ015126-5954 2 WFC3/IR MULTIAC IR-FIX F140W none none none none 1 N/A 39-WFC3 CUM SPT-GALJ015126-5954 3 WFC3/IR MULTIAC IR-FIX F125W none none none none 1 N/A 39-WFC3 CUM SPT-GALJ015126-5954 4 WFC3/IR MULTIAC IR-FIX F105W none none none none 1 N/A 39-WFC3 CUM SPT-GALJ015126-5954 5 WFC3/IR MULTIAC IR-FIX F105W none none none none 1 N/A 39-WFC3 CUM SPT-GALJ015126-5954 6 WFC3/IR MULTIAC IR-FIX F160W none none none none 1 N/A 39-WFC3 CUM SPT-GALJ015126-5954 7 WFC3/IR MULTIAC IR-FIX F140W none none none none 1 N/A 39-WFC3 CUM SPT-GALJ015126-5954 8 WFC3/IR MULTIAC IR-FIX F125W none none none none 1 N/A 39-WFC3 CUM SPT-GALJ015126-5954 9 WFC3/IR MULTIAC IR-FIX F160W none none none none 2 N/A 39-WFC3 CUM SPT-GALJ015126-5954 10 WFC3/IR MULTIAC IR-FIX F140W none none none none 2 N/A 39-WFC3 CUM SPT-GALJ015126-5954 11 WFC3/IR MULTIAC IR-FIX F125W none none none none 2 N/A 39-WFC3 CUM SPT-GALJ015126-5954 12 WFC3/IR MULTIAC IR-FIX F105W none none none none 2 N/A 39-WFC3 CUM SPT-GALJ015126-5954 13 WFC3/IR MULTIAC IR-FIX F105W none none none none 2 N/A 39-WFC3 CUM SPT-GALJ015126-5954 14 WFC3/IR MULTIAC IR-FIX F160W none none none none 2 N/A 39-WFC3 CUM SPT-GALJ015126-5954 15 WFC3/IR MULTIAC IR-FIX F140W none none none none 2 N/A 39-WFC3 CUM SPT-GALJ015126-5954 16 WFC3/IR MULTIAC IR-FIX F125W none none none none 2 N/A 39-WFC3 CUM SPT-GALJ015126-5954 17 ACS/WFC ACCUM WFC-FIX F814W none none none none 3 343.0 S 39-ACS SPT-GALJ015126-5954 18 ACS/WFC ACCUM WFC-FIX F814W none none none none 3 343.0 S 39-ACS SPT-GALJ015126-5954 19 ACS/WFC ACCUM WFC-FIX F814W none none none none 3 343.0 S 39-ACS SPT-GALJ015126-5954 20 ACS/WFC ACCUM WFC-FIX F606W none none none none 3 343.0 S 39-ACS 14896( 4) - 19-Dec-2016 16:42:14 - [ 7] 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 | ------------------------------------------------------------------------------------------------------------------------------------ SPT-GALJ015126-5954 21 ACS/WFC ACCUM WFC-FIX F606W none none none none 3 343.0 S 39-ACS SPT-GALJ015126-5954 22 ACS/WFC ACCUM WFC-FIX F606W none none none none 3 343.0 S 39-ACS 14896( 4) - 19-Dec-2016 16:42:14 - [ 8] Visit: 02 (SGAS0952) 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 SGASJ095237 WFC3/IR MULTIAC IR-FIX F140W NSAMP=10, SAMP-SEQ=SPARS50 1 DEF SEQ 1-6 NON-INT +343531 CUM (452.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SGASJ095237 WFC3/IR MULTIAC IR-FIX F125W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 1 +343531 CUM (402.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SGASJ095237 WFC3/IR MULTIAC IR-FIX F098M NSAMP=10, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 2 +343531 CUM (452.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SGASJ095237 WFC3/IR MULTIAC IR-FIX F098M NSAMP=10, SAMP-SEQ=SPARS50 1 DEF POS TARG 6.48275, +343531 CUM (452.936 0.30275 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SGASJ095237 WFC3/IR MULTIAC IR-FIX F140W NSAMP=10, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 4 +343531 CUM (452.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 SGASJ095237 WFC3/IR MULTIAC IR-FIX F125W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 4 +343531 CUM (402.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 SGASJ095237 WFC3/IR MULTIAC IR-FIX F140W NSAMP=10, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.47425, +343531 CUM (452.936 0.6055; SEQ 7-12 NON-INT S) ------------------------------------------------------------------------------------------------------------------------------------ 8 SGASJ095237 WFC3/IR MULTIAC IR-FIX F125W NSAMP=10, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 7 +343531 CUM (452.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 SGASJ095237 WFC3/IR MULTIAC IR-FIX F098M NSAMP=10, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 8 +343531 CUM (452.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 SGASJ095237 WFC3/IR MULTIAC IR-FIX F098M NSAMP=11, SAMP-SEQ=SPARS50 1 DEF POS TARG 7.317, 0.90825 +343531 CUM (502.937 S) ------------------------------------------------------------------------------------------------------------------------------------ 14896( 4) - 19-Dec-2016 16:42:14 - [ 9] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 11 SGASJ095237 WFC3/IR MULTIAC IR-FIX F140W NSAMP=10, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 10 +343531 CUM (452.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 SGASJ095237 WFC3/IR MULTIAC IR-FIX F125W NSAMP=10, SAMP-SEQ=SPARS50 1 DEF SAME POS AS 10 +343531 CUM (452.936 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 | ------------------------------------------------------------------------------------------------------------------------------------ SGASJ095237+343531 1 WFC3/IR MULTIAC IR-FIX F140W none none none none 1 N/A CUM SGASJ095237+343531 2 WFC3/IR MULTIAC IR-FIX F125W none none none none 1 N/A CUM SGASJ095237+343531 3 WFC3/IR MULTIAC IR-FIX F098M none none none none 1 N/A CUM SGASJ095237+343531 4 WFC3/IR MULTIAC IR-FIX F098M none none none none 1 N/A CUM SGASJ095237+343531 5 WFC3/IR MULTIAC IR-FIX F140W none none none none 1 N/A CUM SGASJ095237+343531 6 WFC3/IR MULTIAC IR-FIX F125W none none none none 1 N/A CUM SGASJ095237+343531 7 WFC3/IR MULTIAC IR-FIX F140W none none none none 2 N/A CUM SGASJ095237+343531 8 WFC3/IR MULTIAC IR-FIX F125W none none none none 2 N/A CUM SGASJ095237+343531 9 WFC3/IR MULTIAC IR-FIX F098M none none none none 2 N/A CUM SGASJ095237+343531 10 WFC3/IR MULTIAC IR-FIX F098M none none none none 2 N/A CUM SGASJ095237+343531 11 WFC3/IR MULTIAC IR-FIX F140W none none none none 2 N/A CUM SGASJ095237+343531 12 WFC3/IR MULTIAC IR-FIX F125W none none none none 2 N/A CUM 14896( 4) - 19-Dec-2016 16:42:14 - [ 10] Summary Form for Proposal 14896 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR-FIX, WFC-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=10, NSAMP=11, NSAMP=7, NSAMP=8, NSAMP=9, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements POS TARG 0.247, 2.984, POS TARG 0.30275, 6.48275, POS TARG 0.3455, -0.47425, POS TARG 0.47425, 0.6055, POS TARG 0.494, 5.968, POS TARG 0.64825, 7.1370, POS TARG 6.48275, 0.30275, POS TARG 7.317, 0.90825, SAME POS AS 1, SAME POS AS 10, SAME POS AS 11, SAME POS AS 13, SAME POS AS 17, SAME POS AS 18, SAME POS AS 19, SAME POS AS 2, SAME POS AS 3, SAME POS AS 4, SAME POS AS 5, SAME POS AS 6, SAME POS AS 7, SAME POS AS 8, SAME POS AS 9, SEQ 1-6 NON-INT, SEQ 1-8 NON-INT, SEQ 17-22 NON-INT, SEQ 7-12 NON-INT, SEQ 9-16 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F098M, F105W, F125W, F140W, F160W, F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SGASJ095237+343531, SPT-GALJ015126-595439-ACS, SPT-GALJ015126-595439-WFC3 ------------------------------------------------------------------------------------------------------------------------------------