16081( 2) - 02-Apr-2020 18:29:02 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16081 Version: 2 Check-in Time: 02-Apr-2020 18:29:02 STScI Edit Number: 0 Title Let's Point Hubble at a Bubble! ------------------------------------------------------------------------------------ Type Cycle GO 27 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. James Rhoads NASA Goddard Space Flight Center Y CoI: Mr. Weida Hu University of Science & Technology of N China CoI: Prof. JunXian Wang University of Science & Technology of N China CoI: Dr. Leopoldo Infante Pontificia Universidad Catolica de Chile N CoI: Dr. Zhenya Zheng Chinese Academy of Sciences N CoI: Dr. Alistair R. Walker National Optical Astronomy Observatory - N CTIO CoI: Dr. Chunyan Jiang Shanghai Astronomical Observatory, CAS N CoI: Prof. L Felipe Barrientos Pontificia Universidad Catolica de Chile N CoI: Dr. Sangeeta Malhotra NASA Goddard Space Flight Center N CoI: Isak Wold NASA Goddard Space Flight Center N ------------------------------------------------------------------------------------ Abstract We have an opportunity to study an ionized region in the redshift 7 universe that has just been identified, after extensive imaging searches followed by spectroscopic confirmation of five Lyman alpha emitting galaxies in the last month. Most of these galaxies have Lyman-alpha equivalent widths incompatible with a neutral intergalactic medium (IGM), and they cluster in small region of the survey, pointing to an ionized bubble in the IGM which allows LyA to escape. All five can be observed in a single imaging field of WFC3-IR. We here request 6 orbits of HST mid-cycle time to (1) reliably measure continuum fluxes and equivalent widths (2) look for fainter, non-LyA emitting neighbors and achieve a more complete census of ionizing photons in this region, and (3) study the sizes of redshift 7 galaxies both in starlight and in Lyman alpha light. Midcyle observations will best enable the results to inform timely JWST observations of the epoch of reionization. This combination of wide field searches for such bubbles, as indicated by LyA galaxies, followed by deep observations with Hubble, is uniquely powerful. It provides huge synergy to study both the progress of reionization in this crucial, central phase, and also the nature of the galaxies that drive this change. ------------------------------------------------------------------------------------ Observations Description ------------------------ Six orbits to do three filters. One field. A bit of dithering. ------------------------------------------------------------------------------------ 16081( 2) - 02-Apr-2020 18:29:02 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 24 COSMOS-Z7-FI GALAXY, HIGH REDSHIFT RA=10H03M35.6621S, J2000 V = 29 +/- 1 NB=24.3, y=27. Coords are ELD-1 GALAXY DEC=+02D08'9.62" center of field. Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 23 COSMOS-Z7-FI GALAXY, HIGH REDSHIFT RA=10H03M31.6431S, J2000 V = 29 +/- 1 NB=24.3, y=27. Coords are ELD-2 GALAXY DEC=+02D08'28.06" center of field. Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 16081( 2) - 02-Apr-2020 18:29:02 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BOX-MIN Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.572 Line_Spacing 0.365 Coordinate_Frame POS-TARG Pattern_Orient 18.528 Angle_Between_Sides 74.653 Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ 16081( 2) - 02-Apr-2020 18:29:02 - [ 4] 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 COSMOS-Z7-F WFC3/IR MULTIAC IR-FIX F125W NSAMP=13, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 IELD-1 CUM (2411.751 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 COSMOS-Z7-F WFC3/IR MULTIAC IR-FIX F098M NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 2 IELD-1 CUM (2611.753 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 COSMOS-Z7-F WFC3/IR MULTIAC IR-FIX F160W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 3 IELD-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 | ------------------------------------------------------------------------------------------------------------------------------------ COSMOS-Z7-FIELD-1 1 WFC3/IR MULTIAC IR-FIX F125W 1 none none none 1 N/A CUM COSMOS-Z7-FIELD-1 1 WFC3/IR MULTIAC IR-FIX F125W 2 none none none 1 N/A CUM COSMOS-Z7-FIELD-1 1 WFC3/IR MULTIAC IR-FIX F125W 3 none none none 1 N/A CUM COSMOS-Z7-FIELD-1 1 WFC3/IR MULTIAC IR-FIX F125W 4 none none none 1 N/A CUM COSMOS-Z7-FIELD-1 2 WFC3/IR MULTIAC IR-FIX F098M 1 none none none 2 N/A CUM COSMOS-Z7-FIELD-1 2 WFC3/IR MULTIAC IR-FIX F098M 2 none none none 2 N/A CUM COSMOS-Z7-FIELD-1 2 WFC3/IR MULTIAC IR-FIX F098M 3 none none none 2 N/A CUM COSMOS-Z7-FIELD-1 2 WFC3/IR MULTIAC IR-FIX F098M 4 none none none 2 N/A CUM COSMOS-Z7-FIELD-1 3 WFC3/IR MULTIAC IR-FIX F160W 1 none none none 3 N/A CUM COSMOS-Z7-FIELD-1 3 WFC3/IR MULTIAC IR-FIX F160W 2 none none none 3 N/A CUM COSMOS-Z7-FIELD-1 3 WFC3/IR MULTIAC IR-FIX F160W 3 none none none 3 N/A CUM COSMOS-Z7-FIELD-1 3 WFC3/IR MULTIAC IR-FIX F160W 4 none none none 3 N/A CUM 16081( 2) - 02-Apr-2020 18:29:02 - [ 5] 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 COSMOS-Z7-F WFC3/IR MULTIAC IR-FIX F125W NSAMP=13, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 IELD-2 CUM (2411.751 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 COSMOS-Z7-F WFC3/IR MULTIAC IR-FIX F098M NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 2 IELD-2 CUM (2611.753 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 COSMOS-Z7-F WFC3/IR MULTIAC IR-FIX F160W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 3 IELD-2 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 | ------------------------------------------------------------------------------------------------------------------------------------ COSMOS-Z7-FIELD-2 1 WFC3/IR MULTIAC IR-FIX F125W 1 none none none 1 N/A CUM COSMOS-Z7-FIELD-2 1 WFC3/IR MULTIAC IR-FIX F125W 2 none none none 1 N/A CUM COSMOS-Z7-FIELD-2 1 WFC3/IR MULTIAC IR-FIX F125W 3 none none none 1 N/A CUM COSMOS-Z7-FIELD-2 1 WFC3/IR MULTIAC IR-FIX F125W 4 none none none 1 N/A CUM COSMOS-Z7-FIELD-2 2 WFC3/IR MULTIAC IR-FIX F098M 1 none none none 2 N/A CUM COSMOS-Z7-FIELD-2 2 WFC3/IR MULTIAC IR-FIX F098M 2 none none none 2 N/A CUM COSMOS-Z7-FIELD-2 2 WFC3/IR MULTIAC IR-FIX F098M 3 none none none 2 N/A CUM COSMOS-Z7-FIELD-2 2 WFC3/IR MULTIAC IR-FIX F098M 4 none none none 2 N/A CUM COSMOS-Z7-FIELD-2 3 WFC3/IR MULTIAC IR-FIX F160W 1 none none none 3 N/A CUM COSMOS-Z7-FIELD-2 3 WFC3/IR MULTIAC IR-FIX F160W 2 none none none 3 N/A CUM COSMOS-Z7-FIELD-2 3 WFC3/IR MULTIAC IR-FIX F160W 3 none none none 3 N/A CUM COSMOS-Z7-FIELD-2 3 WFC3/IR MULTIAC IR-FIX F160W 4 none none none 3 N/A CUM 16081( 2) - 02-Apr-2020 18:29:02 - [ 6] Summary Form for Proposal 16081 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=13, NSAMP=14, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 1 2, PATTERN 1 3 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F098M, F125W, F160W ------------------------------------------------------------------------------------------------------------------------------------ Target Names COSMOS-Z7-FIELD-1, COSMOS-Z7-FIELD-2 ------------------------------------------------------------------------------------------------------------------------------------