14224( 2) - 23-Jul-2015 14:15:45 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14224 Version: 2 Check-in Time: 23-Jul-2015 14:15:45 STScI Edit Number: 0 Title The lowest mass galaxies with extended star formation history: a new cosmological challenge ------------------------------------------------------------------------------------ Type Cycle GO 23 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Carme Gallart Instituto de Astrofisica de Canarias Y CoI: Dr. Matteo Monelli Instituto de Astrofisica de Canarias N CoI: Dr. Giuseppina Battaglia Instituto de Astrofisica de Canarias N CoI: Dr. Jay Anderson Space Telescope Science Institute N CoI: Dr. Edouard Bernard University of Edinburgh, Institute for N Astronomy CoI: Dr. Annalisa Calamida Space Telescope Science Institute N CoI: Dr. Blair Campbell Conn Gemini Observatory, Southern Operations N CoI: Dr. Santi Cassisi INAF, Osservatorio Astronomico di Teramo N CoI: Dr. Michele Cignoni Space Telescope Science Institute N CoI: Prof. Andrea Ferrara Scuola Normale Superiore, Pisa N CoI: Prof. Carlos S Frenk Durham Univ. N CoI: Shoko Jin Kapteyn Astronomical Institute N CoI: Dr. David Nidever University of Michigan N CoI: Dr. Knut A.G. Olsen National Optical Astronomy Observatory, N AURA CoI: Dr. Nicolas Martin Universite de Strasbourg I N CoI: Dr. Lucio Mayer Universitat Zurich N CoI: Dr. Antonela Monachesi Max-Planck-Institut fur Astrophysik N CoI: Mrs. Lara Monteagudo Narvion Instituto de Astrofisica de Canarias N CoI: Prof. Julio Navarro University of Victoria N CoI: Dra. Stefania Salvadori Kapteyn Astronomical Institute N CoI: Dr. Till Sawala Durham Univ. N CoI: Dr. Sijing Shen University of Cambridge N CoI: Dr. Peter B. Stetson Dominion Astrophysical Observatory N CoI: Dr. Guy Stringfellow University of Colorado at Boulder N CoI: Dr. Monica Tosi INAF, Osservatorio Astronomico di Bologna N ------------------------------------------------------------------------------------ Abstract Dwarf galaxies are the most numerous type of galaxies in the present-day Universe. They are thought to be the first galaxies to form and the basic building-blocks of larger galaxies. They are thus, key astrophysical objects for understanding the most common mode of galaxy formation and how they relate to the build-up of larger structures in the Universe. The faintest dwarf galaxies that have been discovered in the Local Group (the so-called ultra-faint dwarfs, UFD) have been shown to contain similar ancient populations, which could indicate that star formation in the smallest sub-halos was suppressed by a global outside influence such as cosmic reionization. This conclusion, however, is severely challenged by the recently discovered Hydra II and Eridanus II UFD, which ground-based color-magnitude diagrams show clear indications of the presence of an intermediate-age, or even, young population, like in a third 14224( 2) - 23-Jul-2015 14:15:45 - [ 2] UFD, Leo T. The goal of this proposal is to determine the complete star formation history of the only three (known so far) UFD galaxies that present an extended period of star formation. We will determine whether they began forming stars before or after the reionization. For that we will obtain deep color-magnitude diagrams and derive star formation histories with an exquisite age resolution (< 1 Gyr at old ages). The proposed observations will place strong constraints on the formation mechanisms of the faintest galaxies in the Universe, on their subsequent evolution, and on the conditions of the early Universe. This will have important implications for our understanding of galaxy formation and evolution in general. ------------------------------------------------------------------------------------ Observations Description ------------------------ For this project, three galaxies are observed in both ACS and WFPC3/UVIS Leo T is observed for 6 orbits, all time is spent in F814W in both cameras. This is because there is the necessary amount of F606W exposure time in the archive, for program 12914, and more exposure time in the same band will be added for program 13770. In this case, we intend to match closely the observing strategy of that program, in terms of central pointing, orientation angle, and some of the dithers. Each orbit is split in two exposures with each camera, organized in two visits of three orbits each. We obtain only long exposures because some short exposures in F814W have been obtained in program 12914, and even the brightest stars in the galaxy are not saturated in the long exposures available for F606W in program 12914. For Eridanus II, we divide the total available exposure time almost evenly in F475W and F814W. The 6 available orbits are organized in 2 visits of 3 orbits each. We require the same orient in all the orbits. In orbit 1 of each visit, we obtain one long exposure in each filter. In orbits two and three, we obtain one long exposure in one of the filters and one short and one long in the other, in order to be able to obtain photometry of the brightest stars in the RGB. For Hydra II we have only one orbit available. Two dithered images of the same lenght are taken in each F475W and F814W. ------------------------------------------------------------------------------------ 14224( 2) - 23-Jul-2015 14:15:45 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 LEO-T GALAXY, AMORPHOUS RA=09H34M53.6100S, J2000 V = 15.1 IRREGULAR DEC=+17D02'43.01" Reference Frame: ICRS Extended: YES Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 2 ERIDANUS2 GALAXY, AMORPHOUS RA=03H44M21.0000S, J2000 V = 16.3 IRREGULAR DEC=-43D31'59.52" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 HYDRA2 GALAXY, AMORPHOUS RA=12H21M42.1000S, J2000 V = 15.8 IRREGULAR DEC=-31D59'7.00" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 14224( 2) - 23-Jul-2015 14:15:45 - [ 4] Visit: 01 Visit Requirements: ORIENT 278.982D TO 278.982 D On Hold Comments: Additional Comments: We are requesting the same orientation angle as the one in which observations of program 12914 have been taken (278.982 degrees, which is also the same orientation in which observations of program 13770 will be taken) in order to match the fields as closely as possible. 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 LEO-T ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1255 S POS TARG 0.0, 0.0; SEQ (1255 S) 1-4 NON-INT; PAR 2 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 LEO-T ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1255 S POS TARG 0.1740, 0.1850; (1255 S) PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 LEO-T ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1351 S POS TARG 0.3232, 0.1235; (1351 S) SEQ 5-8 NON-INT; PAR 6 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1350 S S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 LEO-T ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1351 S POS TARG 0.1005, 0.3305; (1351 S) PAR 8 WITH 7 ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1350 S S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 LEO-T ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1351 S POS TARG 0.5030, 0.0460; (1351 S) SEQ 9-12 NON-INT; PAR 10 WITH 9 ------------------------------------------------------------------------------------------------------------------------------------ 10 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1350 S S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 11 LEO-T ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1351 S POS TARG 0.6770, 0.2310; (1351 S) PAR 12 WITH 11 ------------------------------------------------------------------------------------------------------------------------------------ 12 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1350 S S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 14224( 2) - 23-Jul-2015 14:15:45 - [ 5] 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ LEO-T 1 ACS/WFC ACCUM WFCENTER F814W none none none none 1 N/A ANY 2 WFC3/UVI ACCUM UVIS F814W none none none none 1 N/A S LEO-T 3 ACS/WFC ACCUM WFCENTER F814W none none none none 1 N/A ANY 4 WFC3/UVI ACCUM UVIS F814W none none none none 1 N/A S LEO-T 5 ACS/WFC ACCUM WFCENTER F814W none none none none 2 N/A ANY 6 WFC3/UVI ACCUM UVIS F814W none none none none 2 N/A S LEO-T 7 ACS/WFC ACCUM WFCENTER F814W none none none none 2 N/A ANY 8 WFC3/UVI ACCUM UVIS F814W none none none none 2 N/A S LEO-T 9 ACS/WFC ACCUM WFCENTER F814W none none none none 3 N/A ANY 10 WFC3/UVI ACCUM UVIS F814W none none none none 3 N/A S LEO-T 11 ACS/WFC ACCUM WFCENTER F814W none none none none 3 N/A ANY 12 WFC3/UVI ACCUM UVIS F814W none none none none 3 N/A S 14224( 2) - 23-Jul-2015 14:15:45 - [ 6] Visit: 02 Visit Requirements: ORIENT 278.982D TO 278.982 D On Hold Comments: Additional Comments: We are requesting the same orientation angle as the one in which observations of program 12914 have been taken (278.982 degrees) which is also the same orientation in which observations of program 13770 will be taken) in order to match the fields as closely as possible. 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 LEO-T ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1255 S POS TARG 0.2470, 2.9840; (1255 S) SEQ 1-4 NON-INT; PAR 2 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 LEO-T ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1255 S POS TARG 0.4210, 3.1690; (1255 S) PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 LEO-T ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1351 S POS TARG 0.5702, 3.1075; (1351 S) SEQ 5-8 NON-INT; PAR 6 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1350 S S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 LEO-T ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1351 S POS TARG 0.3475, 3.3145; (1351 S) PAR 8 WITH 7 ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1350 S S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 LEO-T ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1351 S POS TARG 0.7500, 3.0300; (1351 S) SEQ 9-12 NON-INT; PAR 10 WITH 9 ------------------------------------------------------------------------------------------------------------------------------------ 10 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1350 S S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 11 LEO-T ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1351 S POS TARG 0.9240, 3.2150; (1351 S) PAR 12 WITH 11 ------------------------------------------------------------------------------------------------------------------------------------ 12 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1350 S S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 14224( 2) - 23-Jul-2015 14:15:45 - [ 7] 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ LEO-T 1 ACS/WFC ACCUM WFCENTER F814W none none none none 1 N/A ANY 2 WFC3/UVI ACCUM UVIS F814W none none none none 1 N/A S LEO-T 3 ACS/WFC ACCUM WFCENTER F814W none none none none 1 N/A ANY 4 WFC3/UVI ACCUM UVIS F814W none none none none 1 N/A S LEO-T 5 ACS/WFC ACCUM WFCENTER F814W none none none none 2 N/A ANY 6 WFC3/UVI ACCUM UVIS F814W none none none none 2 N/A S LEO-T 7 ACS/WFC ACCUM WFCENTER F814W none none none none 2 N/A ANY 8 WFC3/UVI ACCUM UVIS F814W none none none none 2 N/A S LEO-T 9 ACS/WFC ACCUM WFCENTER F814W none none none none 3 N/A ANY 10 WFC3/UVI ACCUM UVIS F814W none none none none 3 N/A S LEO-T 11 ACS/WFC ACCUM WFCENTER F814W none none none none 3 N/A ANY 12 WFC3/UVI ACCUM UVIS F814W none none none none 3 N/A S 14224( 2) - 23-Jul-2015 14:15:45 - [ 8] Visit: 03 Visit Requirements: ORIENT 107D TO 67 D On Hold Comments: Additional Comments: In this visit, we apply a small dither pattern. Orbit 1: For both cameras, one long exposure in each filter is obtained for F475W and F814W. Dither is applied between the two exposures. Orbit 2: For both cameras, short+long exposure in F814W and long exposure in F475W. Short and long F814W exposures are at the same pointing, F475W exposure is dithered. Orbit 3: For both cameras, short+long exposure in F475W and long exposure in F814W. Short and long F475W exposures are at the same pointing, F814W exposure is dithered. 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 ERIDANUS2 ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 1257 S POS TARG 0.0, 0.0; SEQ (1257 S) 1-4 NON-INT; PAR 2 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ERIDANUS2 ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1300 S POS TARG 0.1740, 0.1850; (1300 S) PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 ERIDANUS2 ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 50 S (50 POS TARG 0.3232, 0.1235; S) SEQ 5-10 NON-INT; PAR 7-8 WITH 5-6 ------------------------------------------------------------------------------------------------------------------------------------ 6 ERIDANUS2 ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1300 S POS TARG 0.3232, 0.1235 (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO, FLASH=10 1 50 S (50 S S) ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 ERIDANUS2 ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 1257 S POS TARG 0.1005, 0.3305; (1257 S) PAR 10 WITH 9 ------------------------------------------------------------------------------------------------------------------------------------ 10 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 11 ERIDANUS2 ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 51 S (51 POS TARG 0.5030, 0.0460; S) SEQ 11-16 NON-INT; PAR 13-14 WITH 11-12 ------------------------------------------------------------------------------------------------------------------------------------ 14224( 2) - 23-Jul-2015 14:15:45 - [ 9] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 12 ERIDANUS2 ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 1257 S POS TARG 0.5030, 0.0460 (1257 S) ------------------------------------------------------------------------------------------------------------------------------------ 13 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO, FLASH=11 1 40 S (40 S S) ------------------------------------------------------------------------------------------------------------------------------------ 14 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 15 ERIDANUS2 ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1300 S POS TARG 0.6770, 0.2310; (1300 S) PAR 16 WITH 15 ------------------------------------------------------------------------------------------------------------------------------------ 16 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1300 S S (1300 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 | ------------------------------------------------------------------------------------------------------------------------------------ ERIDANUS2 1 ACS/WFC ACCUM WFCENTER F475W none none none none 1 N/A ANY 2 WFC3/UVI ACCUM UVIS F475W none none none none 1 N/A S ERIDANUS2 3 ACS/WFC ACCUM WFCENTER F814W none none none none 1 N/A ANY 4 WFC3/UVI ACCUM UVIS F814W none none none none 1 N/A S ERIDANUS2 5 ACS/WFC ACCUM WFCENTER F814W none none none none 2 N/A ERIDANUS2 6 ACS/WFC ACCUM WFCENTER F814W none none none none 2 N/A ANY 7 WFC3/UVI ACCUM UVIS F814W none none none none 2 N/A S ANY 8 WFC3/UVI ACCUM UVIS F814W none none none none 2 N/A S ERIDANUS2 9 ACS/WFC ACCUM WFCENTER F475W none none none none 2 N/A ANY 10 WFC3/UVI ACCUM UVIS F475W none none none none 2 N/A S ERIDANUS2 11 ACS/WFC ACCUM WFCENTER F475W none none none none 3 N/A ERIDANUS2 12 ACS/WFC ACCUM WFCENTER F475W none none none none 3 N/A ANY 13 WFC3/UVI ACCUM UVIS F475W none none none none 3 N/A S ANY 14 WFC3/UVI ACCUM UVIS F475W none none none none 3 N/A S ERIDANUS2 15 ACS/WFC ACCUM WFCENTER F814W none none none none 3 N/A ANY 16 WFC3/UVI ACCUM UVIS F814W none none none none 3 N/A S 14224( 2) - 23-Jul-2015 14:15:45 - [ 10] Visit: 04 Visit Requirements: SAME ORIENT AS 03 On Hold Comments: Additional Comments: In this visit, we apply a small dither pattern. Orbit 1: For both cameras, one long exposure in each filter is obtained for F475W and F814W. Dither is applied between the two exposures. Orbit 2: For both cameras, short+long exposure in F814W and long exposure in F475W. Short and long F814W exposures are at the same pointing, F475W exposure is dithered. Orbit 3: For both cameras, short+long exposure in F475W and long exposure in F814W. Short and long F475W exposures are at the same pointing, F814W exposure is dithered. 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 ERIDANUS2 ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 1257 S POS TARG 0.2470, 2.9840; (1257 S) SEQ 1-4 NON-INT; PAR 2 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ERIDANUS2 ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1300 S POS TARG 0.4210, 3.1690; (1300 S) PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 ERIDANUS2 ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 50 S (50 POS TARG 0.5702, 3.1075; S) SEQ 5-10 NON-INT; PAR 7-8 WITH 5-6 ------------------------------------------------------------------------------------------------------------------------------------ 6 ERIDANUS2 ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1300 S POS TARG 0.5702, 3.1075 (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO, FLASH=10 1 50 S (50 S S) ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 ERIDANUS2 ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 1257 S POS TARG 0.3475, 3.3145; (1257 S) PAR 10 WITH 9 ------------------------------------------------------------------------------------------------------------------------------------ 10 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 11 ERIDANUS2 ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 51 S (51 POS TARG 0.7500, 3.0300; S) SEQ 11-16 NON-INT; PAR 13-14 WITH 11-12 ------------------------------------------------------------------------------------------------------------------------------------ 14224( 2) - 23-Jul-2015 14:15:45 - [ 11] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 12 ERIDANUS2 ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 1257 S POS TARG 0.7500, 3.0300 (1257 S) ------------------------------------------------------------------------------------------------------------------------------------ 13 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO, FLASH=11.0 1 40 S (40 S S) ------------------------------------------------------------------------------------------------------------------------------------ 14 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 15 ERIDANUS2 ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 1300 S POS TARG 0.9240, 3.2150; (1300 S) PAR 16 WITH 15 ------------------------------------------------------------------------------------------------------------------------------------ 16 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1300 S S (1300 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 | ------------------------------------------------------------------------------------------------------------------------------------ ERIDANUS2 1 ACS/WFC ACCUM WFCENTER F475W none none none none 1 N/A ANY 2 WFC3/UVI ACCUM UVIS F475W none none none none 1 N/A S ERIDANUS2 3 ACS/WFC ACCUM WFCENTER F814W none none none none 1 N/A ANY 4 WFC3/UVI ACCUM UVIS F814W none none none none 1 N/A S ERIDANUS2 5 ACS/WFC ACCUM WFCENTER F814W none none none none 2 N/A ERIDANUS2 6 ACS/WFC ACCUM WFCENTER F814W none none none none 2 N/A ANY 7 WFC3/UVI ACCUM UVIS F814W none none none none 2 N/A S ANY 8 WFC3/UVI ACCUM UVIS F814W none none none none 2 N/A S ERIDANUS2 9 ACS/WFC ACCUM WFCENTER F475W none none none none 2 N/A ANY 10 WFC3/UVI ACCUM UVIS F475W none none none none 2 N/A S ERIDANUS2 11 ACS/WFC ACCUM WFCENTER F475W none none none none 3 N/A ERIDANUS2 12 ACS/WFC ACCUM WFCENTER F475W none none none none 3 N/A ANY 13 WFC3/UVI ACCUM UVIS F475W none none none none 3 N/A S ANY 14 WFC3/UVI ACCUM UVIS F475W none none none none 3 N/A S ERIDANUS2 15 ACS/WFC ACCUM WFCENTER F814W none none none none 3 N/A ANY 16 WFC3/UVI ACCUM UVIS F814W none none none none 3 N/A S 14224( 2) - 23-Jul-2015 14:15:45 - [ 12] Visit: 05 Visit Requirements: On Hold Comments: Additional Comments: The orbit is organized as two prime + parallel groups. There is a dither between the two groups. Each group has one exposure in each F475W and F814W bands, of equal duration, for the ACS, and a single exposure for the WFC3 in parallel. In the first group the filter for the parallel is F814W and in the second group it is F475W. This visit can have any orientation. 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 HYDRA2 ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 535 S (535 POS TARG 0.0, 0.0; SEQ S) 1-6 NON-INT; PAR 3 WITH 1-2 ------------------------------------------------------------------------------------------------------------------------------------ 2 HYDRA2 ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 535 S (535 POS TARG 0.0, 0.0 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ANY WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO 1 1300 S S (1300 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HYDRA2 ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 1 535 S (535 POS TARG 0.1740, 0.1850; S) PAR 6 WITH 4-5 ------------------------------------------------------------------------------------------------------------------------------------ 5 HYDRA2 ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 534 S (534 POS TARG 0.1740, 0.1850 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 ANY WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO 1 1300 S S (1300 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 | ------------------------------------------------------------------------------------------------------------------------------------ HYDRA2 1 ACS/WFC ACCUM WFCENTER F814W none none none none 1 N/A HYDRA2 2 ACS/WFC ACCUM WFCENTER F475W none none none none 1 N/A ANY 3 WFC3/UVI ACCUM UVIS F814W none none none none 1 N/A S HYDRA2 4 ACS/WFC ACCUM WFCENTER F814W none none none none 1 N/A HYDRA2 5 ACS/WFC ACCUM WFCENTER F475W none none none none 1 N/A ANY 6 WFC3/UVI ACCUM UVIS F475W none none none none 1 N/A S 14224( 2) - 23-Jul-2015 14:15:45 - [ 13] Summary Form for Proposal 14224 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS, WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, FLASH=10, FLASH=11, FLASH=11.0 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 107D TO 67 D, ORIENT 278.982D TO 278.982 D, PAR 10 WITH 9, PAR 12 WITH 11, PAR 13-14 WITH 11-12, PAR 16 WITH 15, PAR 2 WITH 1, PAR 3 WITH 1-2, PAR 4 WITH 3, PAR 6 WITH 4-5, PAR 6 WITH 5, PAR 7-8 WITH 5-6, PAR 8 WITH 7, POS TARG 0.0, 0.0, POS TARG 0.1005, 0.3305, POS TARG 0.1740, 0.1850, POS TARG 0.2470, 2.9840, POS TARG 0.3232, 0.1235, POS TARG 0.3475, 3.3145, POS TARG 0.4210, 3.1690, POS TARG 0.5030, 0.0460, POS TARG 0.5702, 3.1075, POS TARG 0.6770, 0.2310, POS TARG 0.7500, 3.0300, POS TARG 0.9240, 3.2150, SAME ORIENT AS 03, SEQ 1-4 NON-INT, SEQ 1-6 NON-INT, SEQ 11-16 NON-INT, SEQ 5-10 NON-INT, SEQ 5-8 NON-INT, SEQ 9-12 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F475W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names ANY, ERIDANUS2, HYDRA2, LEO-T ------------------------------------------------------------------------------------------------------------------------------------