17159( 6) - 31-Aug-2023 13:37:18 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17159 Version: 6 Check-in Time: 31-Aug-2023 13:37:18 STScI Edit Number: 3 Title Escaping Lyman Continuum from the Overdensities of Extreme Emission Line Galaxies at z~2.2 ------------------------------------------------------------------------------------ Type Cycle GO 30 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Xin Wang Chinese Academy of Sciences Y CoI: Dr. Zheng Cai Tsinghua University N CoI: Dr. Dongdong Shi Purple Mountain Observatory, CAS N CoI: Prof. Xiaohui Fan University of Arizona N CoI: Dr. Harry Teplitz California Institute of Technology N CoI: Dr. Fuyan Bian European Southern Observatory - Chile N CoI: Prof. XianZhong Zheng Purple Mountain Observatory, CAS N CoI: Dr. Anahita Alavi California Institute of Technology N CoI: Dr. James Colbert California Institute of Technology N CoI: Prof. Matthew A. Malkan University of California - Los Angeles N CoI: Dr. Alaina L. Henry Space Telescope Science Institute N CoI: Mr. Zihao Li Tsinghua University N ------------------------------------------------------------------------------------ Abstract Collectively young massive stars dominate over supermassive black holes in producing the Lyman-continuum (LyC) radiation that reionized the Universe. Yet the direct measurement of such escaping LyC radiation has been challenging. ~50% of galaxies in the reionization epoch reside in protoclusters, hence the knowledge about LyC escaping from overdense environments is crucial. We propose to obtain deep WFC3/UVIS imaging in two massive protocluster fields at z~2.2, efficiently measuring the absolute LyC escape fraction (fesc) of 28 extreme emission line galaxies (EELGs) in total. These EELGs are identified from the existing deep WFC3/G141 slitless spectroscopy of the entire fields, showing prominent [O III]+Hbeta emission with extremely high equivalent width, perfect analogs of currently known galaxies at z~8. Targeting multiple overdensities helps mitigate the line-of-sight variations of intergalactic medium (IGM) transmission. The goals of this proposal are as follows. 1) Measure fesc of these EELGs residing in overdensities to 3-sigma upper limits of 1.6%(0.5%) per galaxy(sightline), to probe the environmental dependence of fesc. 2) Test whether faint galaxies or rare bright galaxies with high fesc dominate the reionization process, and calibrate the observational proxies of LyC leakage for future JWST work. 3) Break the degeneracy between fesc and the LyC production efficiency to measure the production rate of IGM-ionizing photons, constraining if the ionizing budget from EELGs is sufficient for reionization. Exploiting the unique UV capabilities of HST, our program presents a giant leap forward to establish the link between LyC escape and large-scale structure formation. ------------------------------------------------------------------------------------ Observations Description ------------------------ In this program, we obtain in total 38 orbits of WFC3/UVIS imaging in the central regions of two galaxy protoclusters at z~2.2. The entire allocation is equally divided into two pointings (each on one protocluster field) with 18 17159( 6) - 31-Aug-2023 13:37:18 - [ 2] orbits of F225W and 1 orbit of F475W, to cover the extreme emission line galaxies in these fields identified from existing spectroscopy. We employ some orient constraints to maximize the number of line emitters covered within the WFC3/UVIS footprint. We adopt full-orbit long exposures for the F225W imaging, to minimize the amount of post-flash needed to mitigate the charge transfer inefficiency and hence the background noise caused by the post-flash flux. To reach the desired level of 20 e-/pix recommended by STScI, we still need a post-flash of 10 e- for our F225W exposures, to optimally compensate for the loss of charge transfer efficiency over the entire CCD chips. To speed up and facilitate the scheduling and executing processes given our full-orbit long F225W exposures and the reduced gyro capabilities of the aging telescope, we design a UVIS-DITHER-LINE-3PT dither pattern with moderate point spacing so that throughout our program, all F225W visits comprise three orbits. As a result, per pointing, we will conduct six F225W visits (each at 3-orbit depth) and one F475W visit (at 1-orbit depth separated into three exposures using the same dither pattern). Moreover, we request that per pointing, at least two out of the six F225W visits have the same telescope orient angle, so there is a chance that the same set of guide stars can be used for multiple visits (and thus >=6 individual exposures), which is highly conducive to straightforward astrometric alignment and cosmic ray flagging through median stacking. The best-case scenario is that per pointing all three pairs of F225W visits have exactly the same orient. But if not possible given scheduling constraints, we request that the three pairs of F225W visits per pointing have orients with +/-180 or +/- 90 deg offsets in between, to maximize the overlapping spatial coverage of these visits to secure the maximum depth of the largest area in the sky, crucial to our science goals. In addition, for each pointing, the 1-orbit F475W visit should have orient identical to either one of the orients of the three pairs of the F225W visits, for the sake of maximum overlap in spatial coverage. ------------------------------------------------------------------------------------ 17159( 6) - 31-Aug-2023 13:37:18 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 BOSS1244-LYC CLUSTER OF GALAXIES, RA=12H43M31.3362S, J2000 V = 24.00 +/- 0.05 HIGH REDSHIFT CLUSTER DEC=+35D54'2.22" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 BOSS1244-LYC CLUSTER OF GALAXIES, RA=12H43M31.4031S, J2000 V = 24.00 +/- 0.05 -FLIP HIGH REDSHIFT CLUSTER DEC=+35D54'3.96" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 BOSS1542-LYC CLUSTER OF GALAXIES, RA=15H42M53.6483S, J2000 V = 24.00 +/- 0.05 HIGH REDSHIFT CLUSTER DEC=+38D50'26.71" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 4 BOSS1542-LYC CLUSTER OF GALAXIES, RA=15H42M53.6619S, J2000 V = 24.00 +/- 0.05 -FLIP HIGH REDSHIFT CLUSTER DEC=+38D50'28.61" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 17159( 6) - 31-Aug-2023 13:37:18 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.135 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 17159( 6) - 31-Aug-2023 13:37:18 - [ 5] Visit: 01 (boss1244-lyc-v1) Visit Requirements: ORIENT 107D TO 117 D On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 01-07), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1244-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2750 S POS TARG 0, 0; PATTERN 3 C S ER (8250 S) 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 6] Visit: 02 (boss1244-lyc-v2) Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 01-07), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1244-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2750 S POS TARG 0, 0; PATTERN 3 C S ER (8250 S) 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 7] Visit: 03 (boss1244-lyc-v3) Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 01-07), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1244-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2750 S POS TARG 0, 0; PATTERN 3 C S ER (8250 S) 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 8] Visit: 04 (boss1244-lyc-v4) Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 01-07), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1244-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2750 S POS TARG 0, 0; PATTERN 3 C S ER (8250 S) 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 9] Visit: 05 (boss1244-lyc-v5) Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 01-07), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1244-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2750 S POS TARG 0, 0; PATTERN 3 C S ER (8250 S) 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 10] Visit: 06 (boss1244-lyc-v6) Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 01-07), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1244-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2750 S POS TARG 0, 0; PATTERN 3 C S ER (8250 S) 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 11] Visit: 07 (boss1244-uvc) Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 01-07), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1244-LY WFC3/UVI ACCUM UVIS-CENT F475W 1 835 S POS TARG 0, 0; PATTERN 3 C S ER (2505 S) 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 none none none 1 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 none none none 1 N/A S TER BOSS1244-LYC 1 WFC3/UVI ACCUM UVIS-CEN F475W 3 none none none 1 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 12] Visit: 08 (boss1542-lyc-v1) Visit Requirements: ORIENT 95D TO 105 D On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 08-14), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1542-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2800 S PATTERN 3 1 C S ER (8400 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 13] Visit: 09 (boss1542-lyc-v2) Visit Requirements: SAME ORIENT AS 08 On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 08-14), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1542-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2800 S PATTERN 3 1 C S ER (8400 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 14] Visit: 10 (boss1542-lyc-v3) Visit Requirements: SAME ORIENT AS 08 On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 08-14), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1542-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2800 S PATTERN 3 1 C S ER (8400 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 15] Visit: 11 (boss1542-lyc-v4) Visit Requirements: SAME ORIENT AS 08 On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 08-14), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1542-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2800 S PATTERN 3 1 C S ER (8400 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 16] Visit: 12 (boss1542-lyc-v5) Visit Requirements: SAME ORIENT AS 08 On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 08-14), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1542-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2800 S PATTERN 3 1 C S ER (8400 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 17] Visit: 13 (boss1542-lyc-v6) Visit Requirements: SAME ORIENT AS 08 On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 08-14), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1542-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2800 S PATTERN 3 1 C S ER (8400 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 18] Visit: 14 (boss1542-uvc) Visit Requirements: SAME ORIENT AS 08 On Hold Comments: Additional Comments: If there is an over-subscription in the scheduling windows or problems assigning a single orient for all 19 orbits (visits 08-14), please contact the PI immediately to discuss the possibilities and requirements to use the +/-180 or +/- 90 deg orient offsets for a subset of visits. 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 BOSS1542-LY WFC3/UVI ACCUM UVIS-CENT F475W 1 850 S POS TARG 0, 0; PATTERN 3 C S ER (2550 S) 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 none none none 1 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 none none none 1 N/A S TER BOSS1542-LYC 1 WFC3/UVI ACCUM UVIS-CEN F475W 3 none none none 1 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 19] Visit: 51 (boss1542-lyc-v7) Visit Requirements: ORIENT 280.6D TO 285.6 D On Hold Comments: Additional Comments: *IMPORTANT* PI prefers the orient of 283.1 deg. To ensure timely execution of this visit, we created a new target which opens the schedulability window in early 2024. Please help schedule the repeat of this visit during this window. If not possible, then please contact the PI to discuss the possibility to revert back to the original setting of this visit, such that it can be scheduled in mid-2024. 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 BOSS1542-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2779 S PATTERN 3 1 C-FLIP S ER (8337 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1542-LYC-FLIP 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1542-LYC-FLIP 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1542-LYC-FLIP 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 20] Visit: 52 (boss1542-lyc-v8) Visit Requirements: SAME ORIENT AS 51 On Hold Comments: Additional Comments: To ensure timely execution of this visit, we created a new target which opens the schedulability window in early 2024. Please help schedule the repeat of this visit during this window. If not possible, then please contact the PI to discuss the possibility to revert back to the original setting of this visit, such that it can be scheduled in mid-2024. 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 BOSS1542-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2779 S PATTERN 3 1 C-FLIP S ER (8337 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1542-LYC-FLIP 1 WFC3/UVI ACCUM UVIS-CEN F225W 1 none none none 1 N/A S TER BOSS1542-LYC-FLIP 1 WFC3/UVI ACCUM UVIS-CEN F225W 2 none none none 2 N/A S TER BOSS1542-LYC-FLIP 1 WFC3/UVI ACCUM UVIS-CEN F225W 3 none none none 3 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 21] Visit: 53 (boss1542-lyc-v9) Visit Requirements: SAME ORIENT AS 51 On Hold Comments: Additional Comments: To ensure timely execution of this visit, we created a new target which opens the schedulability window in early 2024. Please help schedule the repeat of this visit during this window. If not possible, then please contact the PI to discuss the possibility to revert back to the original setting of this visit, such that it can be scheduled in mid-2024. 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 BOSS1542-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2788 S C-FLIP S ER (2788 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1542-LYC-FLIP 1 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 1 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 22] Visit: 56 (boss1244-lyc-v7) Visit Requirements: SAME ORIENT AS 57 On Hold Comments: Additional Comments: To ensure timely execution of this orbit, we created a new target which opens the schedulability window in late 2023 to early 2024. Please help schedule the repeat of this orbit during this window. If not possible, then please contact the PI to discuss the possibility to revert back to the original setting of this orbit, such that it can be scheduled in mid-2024. 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 BOSS1244-LY WFC3/UVI ACCUM UVIS-CENT F225W FLASH=10 1 2788 S POS TARG 0, 0 C-FLIP S ER (2788 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1244-LYC-FLIP 1 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 1 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 23] Visit: 57 (boss1244-uvc-repeat) Visit Requirements: ORIENT 291D TO 296 D On Hold Comments: Additional Comments: *IMPORTANT* PI prefers the orient of 293.5 deg. To ensure timely execution of this visit, which is the only F475W imaging in this field, we created a new target which opens the schedulability window in late 2023 to early 2024. Please help schedule the repeat of this visit during this window. If not possible, then please contact the PI to discuss the possibility to revert back to the original setting of this visit, such that it can be scheduled in mid-2024. 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 BOSS1244-LY WFC3/UVI ACCUM UVIS-CENT F475W 1 844 S POS TARG 0, 0; PATTERN 3 C-FLIP S ER (2532 S) 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BOSS1244-LYC-FLIP 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 none none none 1 N/A S TER BOSS1244-LYC-FLIP 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 none none none 1 N/A S TER BOSS1244-LYC-FLIP 1 WFC3/UVI ACCUM UVIS-CEN F475W 3 none none none 1 N/A S TER 17159( 6) - 31-Aug-2023 13:37:18 - [ 24] Summary Form for Proposal 17159 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS-CENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=10 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 107D TO 117 D, ORIENT 280.6D TO 285.6 D, ORIENT 291D TO 296 D, ORIENT 95D TO 105 D, PATTERN 3 1, POS TARG 0, 0, SAME ORIENT AS 01, SAME ORIENT AS 08, SAME ORIENT AS 51, SAME ORIENT AS 57 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F225W, F475W ------------------------------------------------------------------------------------------------------------------------------------ Target Names BOSS1244-LYC, BOSS1244-LYC-FLIP, BOSS1542-LYC, BOSS1542-LYC-FLIP ------------------------------------------------------------------------------------------------------------------------------------