15302( 3) - 18-Jun-2018 18:47:21 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15302 Version: 3 Check-in Time: 18-Jun-2018 18:47:21 STScI Edit Number: 0 Title Unveiling the formation of Andromeda XIX - a uniquely diffuse Local Group galaxy ------------------------------------------------------------------------------------ Type Cycle GO 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Michelle L.M. Collins University of Surrey Y CoI: Dr. Erik Tollerud Space Telescope Science Institute N CoI: Dr. Karoline Gilbert Space Telescope Science Institute N CoI: Dr. Eduardo Balbinot University of Surrey N CoI: Dr. Benjamin F. Williams University of Washington N CoI: Dr. Andrew Eugene Dolphin Raytheon Company N ------------------------------------------------------------------------------------ Abstract We request 16 orbits of HST/ACS to obtain imaging in F606W and F814W of Andromeda (And) XIX, a truly unique galaxy. With an effective radius of 3.1 kpc, and a surface brightness of 29.3 mag per square arcsec, it is the only known Local Group analogue of the intriguing newly-discovered ultra diffuse galaxies found at higher redshift. And XIX contains significant substructure, and is one of only 3 low mass galaxies that is known to have prolate rotation. This suggests the possibility that And XIX formed as the result of a merger. Using deep, coordinated parallel HST/ACS and WFC3 imaging, we will efficiently test this formation scenario. Our proposed observations will allow us to measure detailed star formation histories for both the centre of And XIX, and its most significant substructure, the southern clump. If And XIX has been formed as the result of a merger, we expect to see significant differences between the star formation histories of both fields. If And XIX has formed through secular processes or tidal stripping, we expect to see no difference between the two fields. Either result will place a strong constraint on the formation of And XIX, and therefore also the most diffuse galaxies known. ------------------------------------------------------------------------------------ Observations Description ------------------------ Our primary objective is to measure the star formation history (SFH) in the center of And XIX, as well as its most significant substructure, the southern clump. As the southern clump is separated from the center of And XIX by the distance between the ACS and WFC3 camera, this can be achieved with a coordinated parallel observation using these two instruments. We will therefore observe And XIX with one central ACS/WFC field and one parallel WFC3/UVIS field positioned in the southern clump. Field positioning To coordinate our parallel WFC3 observation in the southern clump substructure with our primary ACS field, we require a specific ORIENT. Using the Aladin tool in APT, we determine that both the central field and the substructure can be efficiently targeted with ORIENTs between 155 and 177 degrees. All visits 15302( 3) - 18-Jun-2018 18:47:21 - [ 2] require the same orientation, to ensure we sample the same region of And XIX with each visit, and this has been specified in our visit descriptions. Required depth Our depth constraints are set by the need to measure precision SFHs over the lifetime of And XIX. We employ the F814W and F606W filters (for both ACS and WFC3), which are well-suited for measuring the SFHs of nearby dwarf galaxies (e.g. Brown et al. 2015). To achieve our science goal, we require S/N > 8 at the oldest main sequence turn-off (Weisz et al. 2014) for And XIX. This S/N will permit us to reliably distinguish stars from background galaxies at this depth (Radburn-Smith, 2011). Simulations of And XIX in our phase 1 proposal indicate that the oMSTO in And XIX is located at F606W = 28.1 mag and F814W = 27.7 mag. Exposure times and observational strategy Using the ACS ETC, we determine that to reach a S/N = 8 at these depths, we require 7 orbits in F606W and 9 orbits in F814W, totalling16 orbits. To increase the schedulability of our observations, we have set schedulability to 60, giving a total of 36 days in cycle 25, for which these observations can be made. We will split each orbit between F606W and F814W, which will allow these observations to be used to obtain RR Lyrae light curves (e.g., Brown et al. 2004). While not a primary part of our science case, it does not detract from our use case and substantially enhances the archival value. To properly sample the lightcurves, we require our visits to be seprataed by between 4 hours and 3 days. Also, as RR Lyrae periods are ~12 hours, the visits must not be spaced by precisely N*0.5 days. Standard 4-point dither patterns will be used to achieve 0.5 pixel sampling. ------------------------------------------------------------------------------------ 15302( 3) - 18-Jun-2018 18:47:21 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 AND-XIX GALAXY, DWARF RA=00H19M35.4020S, J2000 V = 15.6 SPHEROIDAL DEC=+35D04'22.58" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 15302( 3) - 18-Jun-2018 18:47:21 - [ 4] Visit: 01 Visit Requirements: SCHED 60%; ORIENT 155D TO 177 D On Hold Comments: Additional Comments: This sequence of visits are all for the same target, with the requirement of being spaced by 4 hours to 3 days. This is needed to appropriately sample light curves of variable stars. We also request that the visits *not* be spaced by ~0.5 days, as the variables in this galaxy are likely to have periods of about 0.5 days, and we need to adequately sample the variable phases. 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 AND-XIX ACS/WFC ACCUM WFCENTER F606W CR-SPLIT=2 1 2000 S POS TARG 0.0, 0.0; PAR 2 see below WITH 1 (2460 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AND-XIX WFC3/UVI ACCUM UVIS-CENT F606W CR-SPLIT=2 1 2000 S S ER see below (2638 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 AND-XIX ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 2000 S POS TARG 0.0, 0.0; PAR 4 see below WITH 3 (2598 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 AND-XIX WFC3/UVI ACCUM UVIS-CENT F814W CR-SPLIT=2 1 2000 S S ER see below (2758 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 | ------------------------------------------------------------------------------------------------------------------------------------ AND-XIX 1 ACS/WFC ACCUM WFCENTER F606W none none none 1 1 1230.0 S AND-XIX 1 ACS/WFC ACCUM WFCENTER F606W none none none 2 1 1230.0 S AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F606W none none none 1 1 1319.0 S S TER AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F606W none none none 2 1 1319.0 S S TER AND-XIX 3 ACS/WFC ACCUM WFCENTER F814W none none none 1 2 1299.0 S AND-XIX 3 ACS/WFC ACCUM WFCENTER F814W none none none 2 2 1299.0 S AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F814W none none none 1 2 1379.0 S S TER AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F814W none none none 2 2 1379.0 S S TER 15302( 3) - 18-Jun-2018 18:47:21 - [ 5] Visit: 02 Visit Requirements: SCHED 60%; SAME ORIENT AS 01; AFTER 01 BY 4 H TO 3 D On Hold Comments: Additional Comments: This sequence of visits are all for the same target, with the requirement of being spaced by 4 hours to 3 days. This is needed to appropriately sample light curves of variable stars. We also request that the visits *not* be spaced by ~0.5 days, as the variables in this galaxy are likely to have periods of about 0.5 days, and we need to adequately sample the variable phases. 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 AND-XIX ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 2000 S POS TARG 0.148, 0.086; see below PAR 2 WITH 1 (2460 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AND-XIX WFC3/UVI ACCUM UVIS-CENT F814W CR-SPLIT=2 1 2000 S S ER see below (2638 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 AND-XIX ACS/WFC ACCUM WFCENTER F606W CR-SPLIT=2 1 2000 S POS TARG 0.148, 0.086; see below PAR 4 WITH 3 (2598 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 AND-XIX WFC3/UVI ACCUM UVIS-CENT F606W CR-SPLIT=2 1 2000 S S ER see below (2758 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 | ------------------------------------------------------------------------------------------------------------------------------------ AND-XIX 1 ACS/WFC ACCUM WFCENTER F814W none none none 1 1 1230.0 S AND-XIX 1 ACS/WFC ACCUM WFCENTER F814W none none none 2 1 1230.0 S AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F814W none none none 1 1 1319.0 S S TER AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F814W none none none 2 1 1319.0 S S TER AND-XIX 3 ACS/WFC ACCUM WFCENTER F606W none none none 1 2 1299.0 S AND-XIX 3 ACS/WFC ACCUM WFCENTER F606W none none none 2 2 1299.0 S AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F606W none none none 1 2 1379.0 S S TER AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F606W none none none 2 2 1379.0 S S TER 15302( 3) - 18-Jun-2018 18:47:21 - [ 6] Visit: 03 Visit Requirements: SCHED 60%; SAME ORIENT AS 01; AFTER 02 BY 4 H TO 3 D On Hold Comments: Additional Comments: This sequence of visits are all for the same target, with the requirement of being spaced by 4 hours to 3 days. This is needed to appropriately sample light curves of variable stars. We also request that the visits *not* be spaced by ~0.5 days, as the variables in this galaxy are likely to have periods of about 0.5 days, and we need to adequately sample the variable phases. 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 AND-XIX ACS/WFC ACCUM WFCENTER F606W CR-SPLIT=2 1 2000 S POS TARG 0.222, 0.24; see below PAR 2 WITH 1 (2460 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AND-XIX WFC3/UVI ACCUM UVIS-CENT F606W CR-SPLIT=2 1 2000 S S ER see below (2638 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 AND-XIX ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 2000 S POS TARG 0.222, 0.24; see below PAR 4 WITH 3 (2598 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 AND-XIX WFC3/UVI ACCUM UVIS-CENT F814W CR-SPLIT=2 1 2000 S S ER see below (2758 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 | ------------------------------------------------------------------------------------------------------------------------------------ AND-XIX 1 ACS/WFC ACCUM WFCENTER F606W none none none 1 1 1230.0 S AND-XIX 1 ACS/WFC ACCUM WFCENTER F606W none none none 2 1 1230.0 S AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F606W none none none 1 1 1319.0 S S TER AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F606W none none none 2 1 1319.0 S S TER AND-XIX 3 ACS/WFC ACCUM WFCENTER F814W none none none 1 2 1299.0 S AND-XIX 3 ACS/WFC ACCUM WFCENTER F814W none none none 2 2 1299.0 S AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F814W none none none 1 2 1379.0 S S TER AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F814W none none none 2 2 1379.0 S S TER 15302( 3) - 18-Jun-2018 18:47:21 - [ 7] Visit: 04 Visit Requirements: SCHED 60%; SAME ORIENT AS 01; AFTER 03 BY 4 H TO 3 D On Hold Comments: Additional Comments: This sequence of visits are all for the same target, with the requirement of being spaced by 4 hours to 3 days. This is needed to appropriately sample light curves of variable stars. We also request that the visits *not* be spaced by ~0.5 days, as the variables in this galaxy are likely to have periods of about 0.5 days, and we need to adequately sample the variable phases. 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 AND-XIX ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 2000 S POS TARG 0.074, 0.154; see below PAR 2 WITH 1 (2460 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AND-XIX WFC3/UVI ACCUM UVIS-CENT F814W CR-SPLIT=2 1 2000 S S ER see below (2638 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 AND-XIX ACS/WFC ACCUM WFCENTER F606W CR-SPLIT=2 1 2000 S POS TARG 0.074, 0.154; see below PAR 4 WITH 3 (2598 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 AND-XIX WFC3/UVI ACCUM UVIS-CENT F606W CR-SPLIT=2 1 2000 S S ER see below (2758 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 | ------------------------------------------------------------------------------------------------------------------------------------ AND-XIX 1 ACS/WFC ACCUM WFCENTER F814W none none none 1 1 1230.0 S AND-XIX 1 ACS/WFC ACCUM WFCENTER F814W none none none 2 1 1230.0 S AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F814W none none none 1 1 1319.0 S S TER AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F814W none none none 2 1 1319.0 S S TER AND-XIX 3 ACS/WFC ACCUM WFCENTER F606W none none none 1 2 1299.0 S AND-XIX 3 ACS/WFC ACCUM WFCENTER F606W none none none 2 2 1299.0 S AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F606W none none none 1 2 1379.0 S S TER AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F606W none none none 2 2 1379.0 S S TER 15302( 3) - 18-Jun-2018 18:47:21 - [ 8] Visit: 05 Visit Requirements: SCHED 60%; SAME ORIENT AS 01; AFTER 04 BY 4 H TO 3 D On Hold Comments: Additional Comments: This sequence of visits are all for the same target, with the requirement of being spaced by 4 hours to 3 days. This is needed to appropriately sample light curves of variable stars. We also request that the visits *not* be spaced by ~0.5 days, as the variables in this galaxy are likely to have periods of about 0.5 days, and we need to adequately sample the variable phases. 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 AND-XIX ACS/WFC ACCUM WFCENTER F606W CR-SPLIT=2 1 2000 S POS TARG 0.247, 2.984; see below PAR 2 WITH 1 (2460 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AND-XIX WFC3/UVI ACCUM UVIS-CENT F606W CR-SPLIT=2 1 2000 S S ER see below (2638 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 AND-XIX ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 2000 S POS TARG 0.247, 2.984; see below PAR 4 WITH 3 (2598 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 AND-XIX WFC3/UVI ACCUM UVIS-CENT F814W CR-SPLIT=2 1 2000 S S ER see below (2758 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 | ------------------------------------------------------------------------------------------------------------------------------------ AND-XIX 1 ACS/WFC ACCUM WFCENTER F606W none none none 1 1 1230.0 S AND-XIX 1 ACS/WFC ACCUM WFCENTER F606W none none none 2 1 1230.0 S AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F606W none none none 1 1 1319.0 S S TER AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F606W none none none 2 1 1319.0 S S TER AND-XIX 3 ACS/WFC ACCUM WFCENTER F814W none none none 1 2 1299.0 S AND-XIX 3 ACS/WFC ACCUM WFCENTER F814W none none none 2 2 1299.0 S AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F814W none none none 1 2 1379.0 S S TER AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F814W none none none 2 2 1379.0 S S TER 15302( 3) - 18-Jun-2018 18:47:21 - [ 9] Visit: 06 Visit Requirements: SCHED 60%; SAME ORIENT AS 01; AFTER 05 BY 4 H TO 3 D On Hold Comments: Additional Comments: This sequence of visits are all for the same target, with the requirement of being spaced by 4 hours to 3 days. This is needed to appropriately sample light curves of variable stars. We also request that the visits *not* be spaced by ~0.5 days, as the variables in this galaxy are likely to have periods of about 0.5 days, and we need to adequately sample the variable phases. 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 AND-XIX ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 2000 S POS TARG 0.395, 3.07; see below PAR 2 WITH 1 (2460 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AND-XIX WFC3/UVI ACCUM UVIS-CENT F814W CR-SPLIT=2 1 2000 S S ER see below (2638 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 AND-XIX ACS/WFC ACCUM WFCENTER F606W CR-SPLIT=2 1 2000 S POS TARG 0.395, 3.07; see below PAR 4 WITH 3 (2598 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 AND-XIX WFC3/UVI ACCUM UVIS-CENT F606W CR-SPLIT=2 1 2000 S S ER see below (2758 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 | ------------------------------------------------------------------------------------------------------------------------------------ AND-XIX 1 ACS/WFC ACCUM WFCENTER F814W none none none 1 1 1230.0 S AND-XIX 1 ACS/WFC ACCUM WFCENTER F814W none none none 2 1 1230.0 S AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F814W none none none 1 1 1319.0 S S TER AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F814W none none none 2 1 1319.0 S S TER AND-XIX 3 ACS/WFC ACCUM WFCENTER F606W none none none 1 2 1299.0 S AND-XIX 3 ACS/WFC ACCUM WFCENTER F606W none none none 2 2 1299.0 S AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F606W none none none 1 2 1379.0 S S TER AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F606W none none none 2 2 1379.0 S S TER 15302( 3) - 18-Jun-2018 18:47:21 - [ 10] Visit: 07 Visit Requirements: SCHED 60%; SAME ORIENT AS 01; AFTER 06 BY 4 H TO 3 D On Hold Comments: Additional Comments: This sequence of visits are all for the same target, with the requirement of being spaced by 4 hours to 3 days. This is needed to appropriately sample light curves of variable stars. We also request that the visits *not* be spaced by ~0.5 days, as the variables in this galaxy are likely to have periods of about 0.5 days, and we need to adequately sample the variable phases. 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 AND-XIX ACS/WFC ACCUM WFCENTER F606W CR-SPLIT=2 1 2000 S POS TARG 0.469, 3.224; see below PAR 2 WITH 1 (2460 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AND-XIX WFC3/UVI ACCUM UVIS-CENT F606W CR-SPLIT=2 1 2000 S S ER see below (2638 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 AND-XIX ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 2000 S POS TARG 0.469, 3.224; see below PAR 4 WITH 3 (2598 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 AND-XIX WFC3/UVI ACCUM UVIS-CENT F814W CR-SPLIT=2 1 2000 S S ER see below (2758 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 | ------------------------------------------------------------------------------------------------------------------------------------ AND-XIX 1 ACS/WFC ACCUM WFCENTER F606W none none none 1 1 1230.0 S AND-XIX 1 ACS/WFC ACCUM WFCENTER F606W none none none 2 1 1230.0 S AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F606W none none none 1 1 1319.0 S S TER AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F606W none none none 2 1 1319.0 S S TER AND-XIX 3 ACS/WFC ACCUM WFCENTER F814W none none none 1 2 1299.0 S AND-XIX 3 ACS/WFC ACCUM WFCENTER F814W none none none 2 2 1299.0 S AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F814W none none none 1 2 1379.0 S S TER AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F814W none none none 2 2 1379.0 S S TER 15302( 3) - 18-Jun-2018 18:47:21 - [ 11] Visit: 08 Visit Requirements: SCHED 60%; SAME ORIENT AS 01; AFTER 07 BY 4 H TO 3 D On Hold Comments: Additional Comments: This sequence of visits are all for the same target, with the requirement of being spaced by 4 hours to 3 days. This is needed to appropriately sample light curves of variable stars. We also request that the visits *not* be spaced by ~0.5 days, as the variables in this galaxy are likely to have periods of about 0.5 days, and we need to adequately sample the variable phases. 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 AND-XIX ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 2000 S POS TARG 0.321, 3.138; see below PAR 2 WITH 1 (2460 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AND-XIX WFC3/UVI ACCUM UVIS-CENT F814W CR-SPLIT=2 1 2000 S S ER see below (2638 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 AND-XIX ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 2000 S POS TARG 0.0, 0.0; PAR 4 see below WITH 3 (2652 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 AND-XIX WFC3/UVI ACCUM UVIS-CENT F814W CR-SPLIT=2 1 2000 S S ER see below (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 | ------------------------------------------------------------------------------------------------------------------------------------ AND-XIX 1 ACS/WFC ACCUM WFCENTER F814W none none none 1 1 1230.0 S AND-XIX 1 ACS/WFC ACCUM WFCENTER F814W none none none 2 1 1230.0 S AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F814W none none none 1 1 1319.0 S S TER AND-XIX 2 WFC3/UVI ACCUM UVIS-CEN F814W none none none 2 1 1319.0 S S TER AND-XIX 3 ACS/WFC ACCUM WFCENTER F814W none none none 1 2 1326.0 S AND-XIX 3 ACS/WFC ACCUM WFCENTER F814W none none none 2 2 1326.0 S AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F814W none none none 1 2 1394.0 S S TER AND-XIX 4 WFC3/UVI ACCUM UVIS-CEN F814W none none none 2 2 1394.0 S S TER 15302( 3) - 18-Jun-2018 18:47:21 - [ 12] Summary Form for Proposal 15302 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS-CENTER, WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=2 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 4 H TO 3 D, AFTER 02 BY 4 H TO 3 D, AFTER 03 BY 4 H TO 3 D, AFTER 04 BY 4 H TO 3 D, AFTER 05 BY 4 H TO 3 D, AFTER 06 BY 4 H TO 3 D, AFTER 07 BY 4 H TO 3 D, ORIENT 155D TO 177 D, PAR 2 WITH 1, PAR 4 WITH 3, POS TARG 0.0, 0.0, POS TARG 0.074, 0.154, POS TARG 0.148, 0.086, POS TARG 0.222, 0.24, POS TARG 0.247, 2.984, POS TARG 0.321, 3.138, POS TARG 0.395, 3.07, POS TARG 0.469, 3.224, SAME ORIENT AS 01, SCHED 60% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names AND-XIX ------------------------------------------------------------------------------------------------------------------------------------