17281( 4) - 16-May-2023 16:25:20 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17281 Version: 4 Check-in Time: 16-May-2023 16:25:20 STScI Edit Number: 1 Title Revealing the Nature of Five Potential Bright Galaxies at z > 10 ------------------------------------------------------------------------------------ Type Cycle GO 30 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Gene C K Leung University of Texas at Austin Y CoI: Prof. Steven L. Finkelstein University of Texas at Austin N CoI: Dr. Micaela Bagley University of Texas at Austin N CoI: Dr. Seiji Fujimoto University of Texas at Austin N CoI: Dr. Casey Papovich Texas A & M University N CoI: Dr. L. Y. Aaron Yung NASA Goddard Space Flight Center N CoI: Prof. Rachel S. Somerville Rutgers University N CoI: Dr. Robin Ciardullo The Pennsylvania State University N CoI: Dr. Caryl Gronwall The Pennsylvania State University N CoI: Prof. Shardha Jogee University of Texas at Austin N CoI: Ms. Rebecca L. Larson University of Texas at Austin N CoI: Alexa Morales University of Texas at Austin N CoI: Oscar Antonio Chavez Ortiz University of Texas at Austin N CoI: Dr. Jennifer Lotz NOIRLab - (AZ) N CoI: Dr. Stephen Matthew Wilkins University of Sussex N CoI: Ms. Katherine Chworowsky University of Texas at Austin N CoI: Prof. Eric Gawiser Rutgers the State University of New Jersey N ------------------------------------------------------------------------------------ Abstract Galaxies at the earliest epoch of the Universe are excellent laboratories for the physics of galaxy formation. Using photometry in the 24deg^2 Spitzer-HETDEX Large Area Exploratory survey, we find 5 candidates of galaxies at z>10, characterized by a sharp discontinuity of emission at ~1.5 micron, indicative of a Lyman break at z>10. We propose observations using WFC3 F125W and F160W imaging to reveal the high redshift nature of the five promising z>10 galaxy candidates. The F125W imaging will be able to conclusively rule out a lower redshift model, while the F160W band imaging will constrain the location of the Lyman break. Confirmation of our candidates will challenge models of galaxy formation at high redshift. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will obtain F125W and F160W imaging for 5 candidate bright galaxies at z>10 to confirm the Lyman break and constrain their photometric redshift. For each target, we will observe with 1 visit of 1 orbit, splitting the orbit between F125W and F160W. We center the source at the optimal point using the "IR" aperture. We employ the "BLOB" dither pattern with a two pint "LINE" sub-dither pattern for each source, resulting in 4 exposures per band per source. We selected exposures with SPARS25 and NSAMP=12 or 13 based on experience in previous programs and in consultation with the contact scientist. ------------------------------------------------------------------------------------ 17281( 4) - 16-May-2023 16:25:20 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 111304341 GALAXY, HIGH REDSHIFT RA=00H58M35.6492S, J2000 V = 35 GALAXY DEC=+00D21'9.79" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 401100801 GALAXY, HIGH REDSHIFT RA=01H26M15.1675S, J2000 V = 35 GALAXY DEC=+00D35'29.26" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 604203671 GALAXY, HIGH REDSHIFT RA=01H38M52.3556S, J2000 V = 35 GALAXY DEC=-00D39'42.82" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 6 706802219 GALAXY, HIGH REDSHIFT RA=01H45M26.4850S, J2000 V = 35 GALAXY DEC=-00D41'9.03" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 7 710104162 GALAXY, HIGH REDSHIFT RA=01H44M13.7600S, J2000 V = 35 GALAXY DEC=+00D32'24.09" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 17281( 4) - 16-May-2023 16:25:20 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BLOB WFC3-IR-DITHER-LINE Pattern_Purpose DITHER DITHER Number_Of_Points 2 2 Point_Spacing 5.183 0.636 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 41.859 41.788 Angle_Between_Sides Center_Pattern YES NO ------------------------------------------------------------------------------------------------------------------------------------ 17281( 4) - 16-May-2023 16:25:20 - [ 4] Visit: 02 (111304341) 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 111304341 WFC3/IR MULTIAC IR F125W NSAMP=12, SAMP-SEQ=SPARS25 1 DEF PATTERN 2 1-2 CUM (1111.752 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 111304341 WFC3/IR MULTIAC IR F160W NSAMP=13, SAMP-SEQ=SPARS25 1 DEF CUM (1211.754 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 | ------------------------------------------------------------------------------------------------------------------------------------ 111304341 1 WFC3/IR MULTIAC IR F125W 1 1 none none 1 N/A CUM 111304341 1 WFC3/IR MULTIAC IR F125W 1 2 none none 1 N/A CUM 111304341 1 WFC3/IR MULTIAC IR F125W 2 1 none none 1 N/A CUM 111304341 1 WFC3/IR MULTIAC IR F125W 2 2 none none 1 N/A CUM 111304341 2 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM 111304341 2 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM 111304341 2 WFC3/IR MULTIAC IR F160W 2 1 none none 1 N/A CUM 111304341 2 WFC3/IR MULTIAC IR F160W 2 2 none none 1 N/A CUM 17281( 4) - 16-May-2023 16:25:20 - [ 5] Visit: 03 (401100801) 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 401100801 WFC3/IR MULTIAC IR F125W NSAMP=12, SAMP-SEQ=SPARS25 1 DEF PATTERN 2 1-2 CUM (1111.752 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 401100801 WFC3/IR MULTIAC IR F160W NSAMP=13, SAMP-SEQ=SPARS25 1 DEF CUM (1211.754 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 | ------------------------------------------------------------------------------------------------------------------------------------ 401100801 1 WFC3/IR MULTIAC IR F125W 1 1 none none 1 N/A CUM 401100801 1 WFC3/IR MULTIAC IR F125W 1 2 none none 1 N/A CUM 401100801 1 WFC3/IR MULTIAC IR F125W 2 1 none none 1 N/A CUM 401100801 1 WFC3/IR MULTIAC IR F125W 2 2 none none 1 N/A CUM 401100801 2 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM 401100801 2 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM 401100801 2 WFC3/IR MULTIAC IR F160W 2 1 none none 1 N/A CUM 401100801 2 WFC3/IR MULTIAC IR F160W 2 2 none none 1 N/A CUM 17281( 4) - 16-May-2023 16:25:20 - [ 6] Visit: 04 (604203671) 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 604203671 WFC3/IR MULTIAC IR F125W NSAMP=12, SAMP-SEQ=SPARS25 1 DEF PATTERN 2 1-2 CUM (1111.752 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 604203671 WFC3/IR MULTIAC IR F160W NSAMP=13, SAMP-SEQ=SPARS25 1 DEF CUM (1211.754 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 | ------------------------------------------------------------------------------------------------------------------------------------ 604203671 1 WFC3/IR MULTIAC IR F125W 1 1 none none 1 N/A CUM 604203671 1 WFC3/IR MULTIAC IR F125W 1 2 none none 1 N/A CUM 604203671 1 WFC3/IR MULTIAC IR F125W 2 1 none none 1 N/A CUM 604203671 1 WFC3/IR MULTIAC IR F125W 2 2 none none 1 N/A CUM 604203671 2 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM 604203671 2 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM 604203671 2 WFC3/IR MULTIAC IR F160W 2 1 none none 1 N/A CUM 604203671 2 WFC3/IR MULTIAC IR F160W 2 2 none none 1 N/A CUM 17281( 4) - 16-May-2023 16:25:20 - [ 7] Visit: 07 (706802219) 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 706802219 WFC3/IR MULTIAC IR F125W NSAMP=12, SAMP-SEQ=SPARS25 1 DEF PATTERN 2 1-2 CUM (1111.752 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 706802219 WFC3/IR MULTIAC IR F160W NSAMP=13, SAMP-SEQ=SPARS25 1 DEF CUM (1211.754 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 | ------------------------------------------------------------------------------------------------------------------------------------ 706802219 1 WFC3/IR MULTIAC IR F125W 1 1 none none 1 N/A CUM 706802219 1 WFC3/IR MULTIAC IR F125W 1 2 none none 1 N/A CUM 706802219 1 WFC3/IR MULTIAC IR F125W 2 1 none none 1 N/A CUM 706802219 1 WFC3/IR MULTIAC IR F125W 2 2 none none 1 N/A CUM 706802219 2 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM 706802219 2 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM 706802219 2 WFC3/IR MULTIAC IR F160W 2 1 none none 1 N/A CUM 706802219 2 WFC3/IR MULTIAC IR F160W 2 2 none none 1 N/A CUM 17281( 4) - 16-May-2023 16:25:20 - [ 8] Visit: 08 (710104162) 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 710104162 WFC3/IR MULTIAC IR F125W NSAMP=12, SAMP-SEQ=SPARS25 1 DEF PATTERN 2 1-2 CUM (1111.752 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 710104162 WFC3/IR MULTIAC IR F160W NSAMP=12, SAMP-SEQ=SPARS25 1 DEF CUM (1111.752 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 | ------------------------------------------------------------------------------------------------------------------------------------ 710104162 1 WFC3/IR MULTIAC IR F125W 1 1 none none 1 N/A CUM 710104162 1 WFC3/IR MULTIAC IR F125W 1 2 none none 1 N/A CUM 710104162 1 WFC3/IR MULTIAC IR F125W 2 1 none none 1 N/A CUM 710104162 1 WFC3/IR MULTIAC IR F125W 2 2 none none 1 N/A CUM 710104162 2 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM 710104162 2 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM 710104162 2 WFC3/IR MULTIAC IR F160W 2 1 none none 1 N/A CUM 710104162 2 WFC3/IR MULTIAC IR F160W 2 2 none none 1 N/A CUM 17281( 4) - 16-May-2023 16:25:20 - [ 9] Summary Form for Proposal 17281 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=12, NSAMP=13, SAMP-SEQ=SPARS25 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 2 1-2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F125W, F160W ------------------------------------------------------------------------------------------------------------------------------------ Target Names 111304341, 401100801, 604203671, 706802219, 710104162 ------------------------------------------------------------------------------------------------------------------------------------