11718( 5) - 01-Aug-2008 13:07:39 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11718 Version: 5 Check-in Time: 01-Aug-2008 13:07:39 STScI Edit Number: 0 Title The Stellar Halos of Dwarf Galaxies ------------------------------------------------------------------------------------ Type Cycle GO 17 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Julianne Dalcanton University of Washington CoI: Dr. Anil C. Seth Smithsonian Institution Astrophysical N Observatory CoI: Dr. Benjamin F. Williams University of Washington N CoI: Ms. Karoline Gilbert University of California - Santa Cruz N ------------------------------------------------------------------------------------ Abstract The metal-poor stellar halo is the oldest extended structure in the Galaxy. Such halos are thought to form through hierarchical merging, and contain stars pulled from accreted subhalos. The diffuse stellar halo therefore stores information about the prop reties of the accreted galaxies (i.e., their orbits, stellar masses, and metallicities). It is therefore unsurprising that stellar halos have become a popular probe of the early epoch of galaxy formation. Almost all current work on stellar halos has focused on massive galaxies, however. We propose to extend the work on stellar halos to much lower mass scales, by studying the halos of faint dwarf galaxies. By taking halo studies into the dwarf galaxy regime, we can probe exceptionally small mass scales for the accreted halos. At these mass scales the effects of reionization and supernova feedback have the largest impact on the galaxy population. Stellar halos of dwarf galaxies are therefore a sensitive probe of the key processes needed to resolve the lack of substructure observed at low masses. We are requesting two far-field ACS pointings for the three closest isolated nearby dwarf irregular galaxies whose inner halos have already been mapped with the ACS Nearby Galaxy Survey Treasury. These outer fields will allow us to trace the halo out to roughly half the virial radius, further than any previous study. We will use the resulting distribution of halo stars (1) to unambiguously measure the structure of the stellar halo, with minimal contamination from the main galaxy; (2) to constrain the flattening of the stellar halo; (3) to measure the metallicity of halo stars as a function of radius; (4) to correlate any changes in halo profile with changes in metallicity. The resulting data will constrain models of halo accretion and the epoch of reionization. ------------------------------------------------------------------------------------ Observations Description ------------------------ We are taking ACS images in F475W+F814W at two pointings along the major and minor axes of three nearby dwarfs, targeting the outer regions where we expect to find halo stars. Parallel images will be taken with WFC3/UVIS in the same filter set. Images are CR split for DDO 190 and UGC 8508, with one filter per orbit (2 orbits total). For GR8 we have 1 orbit per pointing, and take two 11718( 5) - 01-Aug-2008 13:07:39 - [ 2] single dithered exposures in each filter. Exposure times for GR8 are split unevenly between the two filters to allow for maximum depth at the color of red clump stars. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11718( 5) - 01-Aug-2008 13:07:39 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 DDO-190-HALO GALAXY, DWARF RA=14H25M1.0742S +/- 0.1", J2000 V = 13.3 1 ELLIPTICAL, DWARF DEC=+44D32'39.57" +/- 0.1" COMPACT Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 2 DDO-190-HALO GALAXY, DWARF COMPACT, RA=14H24M40.3004S +/- 0.1", J2000 V = 13.3 2 DWARF ELLIPTICAL DEC=+44D33'53.62" +/- 0.1" Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 3 UGC-08505-HA GALAXY, MAGELLANIC RA=13H30M59.5348S +/- 0.1", J2000 V = 14.4 LO1 IRREGULAR, LSB DEC=+54D56'58.24" +/- 0.1" Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 4 UGC-08505-HA GALAXY, LSB, MAGELLANIC RA=13H31M5.6961S +/- 0.1", J2000 V = 14.4 LO2 IRREGULAR DEC=+54D52'38.43" +/- 0.1" Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 5 GR8-HALO1 GALAXY, DWARF COMPACT RA=12H58M37.2753S +/- 0.1", J2000 V = 14.7 DEC=+14D10'6.50" +/- 0.1" Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 6 GR8-HALO2 GALAXY, DWARF COMPACT RA=12H58M54.3342S +/- 0.1", J2000 V = 14.7 DEC=+14D11'19.87" +/- 0.1" Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 11718( 5) - 01-Aug-2008 13:07:39 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 3.011 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 11718( 5) - 01-Aug-2008 13:07:39 - [ 5] Visit: 01 Visit Requirements: ORIENT 155D TO 165 D On Hold Comments: Additional Comments: 1 orbit per filter, ANGST style Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 DDO-190-HAL ACS/WFC ACCUM WFC F475W CR-SPLIT=NO 1 824 S PATTERN 1 1-2; PAR 2 O1 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 860 S S see below ------------------------------------------------------------------------------------------------------------------------------------ 3 DDO-190-HAL ACS/WFC ACCUM WFC F814W CR-SPLIT=NO 1 879 S PATTERN 1 3-4; PAR 4 O1 see below WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 915 S S see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ DDO-190-HALO1 1 ACS/WFC ACCUM WFC F475W 1 none none none 1 N/A DDO-190-HALO1 1 ACS/WFC ACCUM WFC F475W 2 none none none 1 N/A DDO-190-HALO1 1 ACS/WFC ACCUM WFC F475W 3 none none none 1 N/A ANY 2 WFC3/UVI ACCUM UVIS F475W 1 none none none 1 860.0 S S ANY 2 WFC3/UVI ACCUM UVIS F475W 2 none none none 1 860.0 S S ANY 2 WFC3/UVI ACCUM UVIS F475W 3 none none none 1 860.0 S S DDO-190-HALO1 3 ACS/WFC ACCUM WFC F814W 1 none none none 2 884.0 S DDO-190-HALO1 3 ACS/WFC ACCUM WFC F814W 2 none none none 2 884.0 S DDO-190-HALO1 3 ACS/WFC ACCUM WFC F814W 3 none none none 2 884.0 S ANY 4 WFC3/UVI ACCUM UVIS F814W 1 none none none 2 935.0 S S ANY 4 WFC3/UVI ACCUM UVIS F814W 2 none none none 2 915.0 S S ANY 4 WFC3/UVI ACCUM UVIS F814W 3 none none none 2 915.0 S S 11718( 5) - 01-Aug-2008 13:07:39 - [ 6] Visit: 02 Visit Requirements: ORIENT 70D TO 80 D On Hold Comments: Additional Comments: 1 orbit per filter, ANGST style Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 DDO-190-HAL ACS/WFC ACCUM WFC F475W CR-SPLIT=NO 1 824 S PATTERN 1 1-2; PAR 2 O2 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 860 S S ------------------------------------------------------------------------------------------------------------------------------------ 3 DDO-190-HAL ACS/WFC ACCUM WFC F814W CR-SPLIT=NO 1 879 S PATTERN 1 3-4; PAR 4 O2 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 915 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ DDO-190-HALO2 1 ACS/WFC ACCUM WFC F475W 1 none none none 1 N/A DDO-190-HALO2 1 ACS/WFC ACCUM WFC F475W 2 none none none 1 N/A DDO-190-HALO2 1 ACS/WFC ACCUM WFC F475W 3 none none none 1 N/A ANY 2 WFC3/UVI ACCUM UVIS F475W 1 none none none 1 N/A S ANY 2 WFC3/UVI ACCUM UVIS F475W 2 none none none 1 N/A S ANY 2 WFC3/UVI ACCUM UVIS F475W 3 none none none 1 N/A S DDO-190-HALO2 3 ACS/WFC ACCUM WFC F814W 1 none none none 2 N/A DDO-190-HALO2 3 ACS/WFC ACCUM WFC F814W 2 none none none 2 N/A DDO-190-HALO2 3 ACS/WFC ACCUM WFC F814W 3 none none none 2 N/A ANY 4 WFC3/UVI ACCUM UVIS F814W 1 none none none 2 N/A S ANY 4 WFC3/UVI ACCUM UVIS F814W 2 none none none 2 N/A S ANY 4 WFC3/UVI ACCUM UVIS F814W 3 none none none 2 N/A S 11718( 5) - 01-Aug-2008 13:07:39 - [ 7] Visit: 03 Visit Requirements: ORIENT 210D TO 220 D On Hold Comments: Additional Comments: 1 orbit per filter, ANGST style Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 UGC-08505-H ACS/WFC ACCUM WFC F475W CR-SPLIT=NO 1 855 S PATTERN 1 1-2; PAR 2 ALO1 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 900 S S ------------------------------------------------------------------------------------------------------------------------------------ 3 UGC-08505-H ACS/WFC ACCUM WFC F814W CR-SPLIT=NO 1 915 S PATTERN 1 3-4; PAR 4 ALO1 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 961 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ UGC-08505-HALO1 1 ACS/WFC ACCUM WFC F475W 1 none none none 1 N/A UGC-08505-HALO1 1 ACS/WFC ACCUM WFC F475W 2 none none none 1 N/A UGC-08505-HALO1 1 ACS/WFC ACCUM WFC F475W 3 none none none 1 N/A ANY 2 WFC3/UVI ACCUM UVIS F475W 1 none none none 1 N/A S ANY 2 WFC3/UVI ACCUM UVIS F475W 2 none none none 1 N/A S ANY 2 WFC3/UVI ACCUM UVIS F475W 3 none none none 1 N/A S UGC-08505-HALO1 3 ACS/WFC ACCUM WFC F814W 1 none none none 2 N/A UGC-08505-HALO1 3 ACS/WFC ACCUM WFC F814W 2 none none none 2 N/A UGC-08505-HALO1 3 ACS/WFC ACCUM WFC F814W 3 none none none 2 N/A ANY 4 WFC3/UVI ACCUM UVIS F814W 1 none none none 2 N/A S ANY 4 WFC3/UVI ACCUM UVIS F814W 2 none none none 2 N/A S ANY 4 WFC3/UVI ACCUM UVIS F814W 3 none none none 2 N/A S 11718( 5) - 01-Aug-2008 13:07:39 - [ 8] Visit: 04 Visit Requirements: SAME ORIENT AS 03 On Hold Comments: Additional Comments: 1 orbit per filter, ANGST style Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 UGC-08505-H ACS/WFC ACCUM WFC F475W CR-SPLIT=NO 1 855 S PATTERN 1 1-2; PAR 2 ALO2 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 900 S S ------------------------------------------------------------------------------------------------------------------------------------ 3 UGC-08505-H ACS/WFC ACCUM WFC F814W CR-SPLIT=NO 1 915 S PATTERN 1 3-4; PAR 4 ALO2 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 961 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ UGC-08505-HALO2 1 ACS/WFC ACCUM WFC F475W 1 none none none 1 N/A UGC-08505-HALO2 1 ACS/WFC ACCUM WFC F475W 2 none none none 1 N/A UGC-08505-HALO2 1 ACS/WFC ACCUM WFC F475W 3 none none none 1 N/A ANY 2 WFC3/UVI ACCUM UVIS F475W 1 none none none 1 N/A S ANY 2 WFC3/UVI ACCUM UVIS F475W 2 none none none 1 N/A S ANY 2 WFC3/UVI ACCUM UVIS F475W 3 none none none 1 N/A S UGC-08505-HALO2 3 ACS/WFC ACCUM WFC F814W 1 none none none 2 N/A UGC-08505-HALO2 3 ACS/WFC ACCUM WFC F814W 2 none none none 2 N/A UGC-08505-HALO2 3 ACS/WFC ACCUM WFC F814W 3 none none none 2 N/A ANY 4 WFC3/UVI ACCUM UVIS F814W 1 none none none 2 N/A S ANY 4 WFC3/UVI ACCUM UVIS F814W 2 none none none 2 N/A S ANY 4 WFC3/UVI ACCUM UVIS F814W 3 none none none 2 N/A S 11718( 5) - 01-Aug-2008 13:07:39 - [ 9] Visit: 05 Visit Requirements: ORIENT 285D TO 295 D On Hold Comments: Additional Comments: 1 orbit for the whole target. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 GR8-HALO1 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO 1 400 S GS ACQ SCENARIO BASE1B3; see below PAR 2 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 GR8-HALO1 WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 450 S S see below ------------------------------------------------------------------------------------------------------------------------------------ 3 GR8-HALO1 ACS/WFC ACCUM WFC F475W CR-SPLIT=NO 1 720 S PAR 4 WITH 3 see below ------------------------------------------------------------------------------------------------------------------------------------ 4 GR8-HALO1 WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 730 S S see below ------------------------------------------------------------------------------------------------------------------------------------ 5 GR8-HALO1 ACS/WFC ACCUM WFC F475W CR-SPLIT=NO 1 720 S POS TARG 0.1482, 0.1602; see below PAR 6 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 GR8-HALO1 WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 730 S S see below ------------------------------------------------------------------------------------------------------------------------------------ 7 GR8-HALO1 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO 1 400 S SAME POS AS 5; PAR 8 see below WITH 7 ------------------------------------------------------------------------------------------------------------------------------------ 8 GR8-HALO1 WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 450 S S see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GR8-HALO1 1 ACS/WFC ACCUM WFC F814W none none none none 1 375.0 S GR8-HALO1 2 WFC3/UVI ACCUM UVIS F814W none none none none 1 450.0 S S GR8-HALO1 3 ACS/WFC ACCUM WFC F475W none none none none 1 695.0 S GR8-HALO1 4 WFC3/UVI ACCUM UVIS F475W none none none none 1 730.0 S S GR8-HALO1 5 ACS/WFC ACCUM WFC F475W none none none none 1 695.0 S GR8-HALO1 6 WFC3/UVI ACCUM UVIS F475W none none none none 1 730.0 S S GR8-HALO1 7 ACS/WFC ACCUM WFC F814W none none none none 1 375.0 S GR8-HALO1 8 WFC3/UVI ACCUM UVIS F814W none none none none 1 450.0 S S 11718( 5) - 01-Aug-2008 13:07:39 - [ 10] Visit: 06 Visit Requirements: SAME ORIENT AS 05 On Hold Comments: Additional Comments: 1 orbit for the whole target. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 GR8-HALO2 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO 1 400 S GS ACQ SCENARIO BASE1B3; see below PAR 2 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 GR8-HALO2 WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 450 S S see below ------------------------------------------------------------------------------------------------------------------------------------ 3 GR8-HALO2 ACS/WFC ACCUM WFC F475W CR-SPLIT=NO 1 720 S PAR 4 WITH 3 see below ------------------------------------------------------------------------------------------------------------------------------------ 4 GR8-HALO2 WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 730 S S see below ------------------------------------------------------------------------------------------------------------------------------------ 5 GR8-HALO2 ACS/WFC ACCUM WFC F475W CR-SPLIT=NO 1 720 S POS TARG 0.1482, 0.1602; see below PAR 6 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 GR8-HALO2 WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 730 S S see below ------------------------------------------------------------------------------------------------------------------------------------ 7 GR8-HALO2 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO 1 400 S SAME POS AS 5; PAR 8 see below WITH 7 ------------------------------------------------------------------------------------------------------------------------------------ 8 GR8-HALO2 WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 450 S S see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GR8-HALO2 1 ACS/WFC ACCUM WFC F814W none none none none 1 375.0 S GR8-HALO2 2 WFC3/UVI ACCUM UVIS F814W none none none none 1 450.0 S S GR8-HALO2 3 ACS/WFC ACCUM WFC F475W none none none none 1 695.0 S GR8-HALO2 4 WFC3/UVI ACCUM UVIS F475W none none none none 1 730.0 S S GR8-HALO2 5 ACS/WFC ACCUM WFC F475W none none none none 1 695.0 S GR8-HALO2 6 WFC3/UVI ACCUM UVIS F475W none none none none 1 730.0 S S GR8-HALO2 7 ACS/WFC ACCUM WFC F814W none none none none 1 375.0 S GR8-HALO2 8 WFC3/UVI ACCUM UVIS F814W none none none none 1 450.0 S S 11718( 5) - 01-Aug-2008 13:07:39 - [ 11] Summary Form for Proposal 11718 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS, WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GS ACQ SCENARIO BASE1B3, ORIENT 155D TO 165 D, ORIENT 210D TO 220 D, ORIENT 285D TO 295 D, ORIENT 70D TO 80 D, PAR 2 WITH 1, PAR 4 WITH 3, PAR 6 WITH 5, PAR 8 WITH 7, PATTERN 1 1-2, PATTERN 1 3-4, POS TARG 0.1482, 0.1602, SAME ORIENT AS 03, SAME ORIENT AS 05, SAME POS AS 5 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F475W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names ANY, DDO-190-HALO1, DDO-190-HALO2, GR8-HALO1, GR8-HALO2, UGC-08505-HALO1, UGC-08505-HALO2 ------------------------------------------------------------------------------------------------------------------------------------