10201( 3) - 06/01/04 10:36 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 10201 Version: 3 Check-in Date: 01-Jun-2004 14:31:08 1.Proposal Title: The Origin of Dwarf Galaxies and Steep Luminosity Functions in Clusters ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle 4. Parallel Pointing Tolerance GO 13 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Dr. Christopher Conselice California Institute of Technology CoI: Dr. Sven De Rijcke Universiteit Gent N CoI: Dr. Enrico V. Held Osservatorio Astronomico di Padova N ------------------------------------------------------------------------------------ 6. Abstract Clusters of galaxies contain an overdensity of dwarfs compared to the field. The origin of these dwarfs is unknown, but a large fraction of them did not form through standard collapses early in the universe. Some dwarf ellipticals in clusters have metal rich and young stellar populations while others contain old metal poor populations, suggesting multiple formation mechanisms and time scales. We propose to test the idea that dwarfs descend from galaxies accreted into clusters during the past 8 Gyrs by correlating ages and metallicities of dwarfs with their internal structures - spiral arms, bars, and disks. If dwarfs originate from more massive galaxies then these features should be common in metal rich and young dwarfs. On the other hand, if no correlation is found it would suggest that dwarfs form through in- situ collapses of gas in the intragalactic medium after the universe was reionized. ------------------------------------------------------------------------------------ 10201( 3) - 06/01/04 10:36 - [ 2] Observations Description ------------------------ Observataions of the nearby cluster of galaxies, Perseus. These are designed to image the low-mass or dwarf galaxy population in the Perseus cluster. The observations are straightforward: there are 6 pointings with one orbit depth in both F814W and F555W. There are four exposures per each orbit; 2 in each of two different dither positions. There are also WFPC2 parallels that go along with each orbit. The parallel's will be useful since Perseus is a large cluster and these ACS obsevations only cover a small part of it. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10201( 3) - 06/01/04 10:36 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 PERSEUSCLUST CLUSTER OF GALAXIES, RA=03H19M47.91S +/- 0.1", J2000 V = 20.0 ER1 RICH CLUSTER DEC=+41D28'0.27" +/- 0.1" Coordinate Source: IMAGE_TIED_TO_GSC_FRAME 2 PERSEUSCLUST CLUSTER OF GALAXIES, RA=03H19M25.95S +/- 0.1", J2000 V = 20.0 ER2 RICH CLUSTER DEC=+41D25'33.89" +/- 0.1" Coordinate Source: IMAGE_TIED_TO_GSC_FRAME 3 PERSEUSCLUST CLUSTER OF GALAXIES, RA=03H19M23.18S +/- 0.1", J2000 V = 20.0 ER3 RICH CLUSTER DEC=+41D29'59.1" +/- 0.1" Coordinate Source: IMAGE_TIED_TO_GSC_FRAME 4 PERSEUSCLUST CLUSTER OF GALAXIES, RA=03H19M4.73S +/- 0.1", J2000 V = 20.0 ER4 RICH CLUSTER DEC=+41D30'10.93" +/- 0.1" Coordinate Source: IMAGE_TIED_TO_GSC_FRAME 5 PERSEUSCLUST CLUSTER OF GALAXIES, RA=03H19M34.58S +/- 0.1", J2000 V = 20.0 ER5 RICH CLUSTER DEC=+41D33'37.23" +/- 0.1" Coordinate Source: IMAGE_TIED_TO_GSC_FRAME 6 PERSEUSCLUST CLUSTER OF GALAXIES, RA=03H19M9.14S +/- 0.1", J2000 V = 20.0 ER6 RICH CLUSTER DEC=+41D33'50.03" +/- 0.1" Coordinate Source: IMAGE_TIED_TO_GSC_FRAME 10201( 3) - 06/01/04 10:36 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.146 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 47.17 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 10201( 3) - 06/01/04 10:36 - [ 5] Visit: 01 Visit Priority: Visit Requirements: ORIENT 0.0D TO 15.5 D; ORIENT 85.0D TO 95.0 D; ORIENT 175.0D TO 185.0 D; ORIENT 265.0D TO 275.0 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PERSEUSCLUS ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 1130 S PATTERN 1 1 TER1 ------------------------------------------------------------------------------------------------------------------------------------ 2 PERSEUSCLUS ACS/WFC ACCUM WFCENTER F555W CR-SPLIT=2 1 1130 S PATTERN 1 2 TER1 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 01 1 1 none none 1 1 tbd 01 1 1 none none 2 1 tbd 01 1 2 none none 1 1 tbd 01 1 2 none none 2 1 tbd 01 2 1 none none 1 2 592.0 01 2 1 none none 2 2 592.0 01 2 2 none none 1 2 592.0 01 2 2 none none 2 2 592.0 10201( 3) - 06/01/04 10:36 - [ 6] Visit: 02 Visit Priority: Visit Requirements: ORIENT 0.0D TO 15.5 D; ORIENT 85.0D TO 95.0 D; ORIENT 175.0D TO 185.0 D; ORIENT 265.0D TO 275.0 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PERSEUSCLUS ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 1130 S PATTERN 1 1 TER2 ------------------------------------------------------------------------------------------------------------------------------------ 2 PERSEUSCLUS ACS/WFC ACCUM WFCENTER F555W CR-SPLIT=2 1 1130 S PATTERN 1 2 TER2 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 02 1 1 none none 1 1 tbd 02 1 1 none none 2 1 tbd 02 1 2 none none 1 1 tbd 02 1 2 none none 2 1 tbd 02 2 1 none none 1 2 592.0 02 2 1 none none 2 2 592.0 02 2 2 none none 1 2 592.0 02 2 2 none none 2 2 592.0 10201( 3) - 06/01/04 10:36 - [ 7] Visit: 03 Visit Priority: Visit Requirements: ORIENT 0.0D TO 15.5 D; ORIENT 85.0D TO 95.0 D; ORIENT 175.0D TO 185.0 D; ORIENT 265.0D TO 275.0 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PERSEUSCLUS ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 1130 S PATTERN 1 1 TER3 ------------------------------------------------------------------------------------------------------------------------------------ 2 PERSEUSCLUS ACS/WFC ACCUM WFCENTER F555W CR-SPLIT=2 1 1130 S PATTERN 1 2 TER3 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 03 1 1 none none 1 1 tbd 03 1 1 none none 2 1 tbd 03 1 2 none none 1 1 tbd 03 1 2 none none 2 1 tbd 03 2 1 none none 1 2 592.0 03 2 1 none none 2 2 592.0 03 2 2 none none 1 2 592.0 03 2 2 none none 2 2 592.0 10201( 3) - 06/01/04 10:36 - [ 8] Visit: 04 Visit Priority: Visit Requirements: ORIENT 0.0D TO 15.5 D; ORIENT 85.0D TO 95.0 D; ORIENT 175.0D TO 185.0 D; ORIENT 265.0D TO 275.0 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PERSEUSCLUS ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 1130 S PATTERN 1 1 TER4 ------------------------------------------------------------------------------------------------------------------------------------ 2 PERSEUSCLUS ACS/WFC ACCUM WFCENTER F555W CR-SPLIT=2 1 1130 S PATTERN 1 2 TER4 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 04 1 1 none none 1 1 tbd 04 1 1 none none 2 1 tbd 04 1 2 none none 1 1 tbd 04 1 2 none none 2 1 tbd 04 2 1 none none 1 2 592.0 04 2 1 none none 2 2 592.0 04 2 2 none none 1 2 592.0 04 2 2 none none 2 2 592.0 10201( 3) - 06/01/04 10:36 - [ 9] Visit: 05 Visit Priority: Visit Requirements: ORIENT 0.0D TO 15.5 D; ORIENT 85.0D TO 95.0 D; ORIENT 175.0D TO 185.0 D; ORIENT 265.0D TO 275.0 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PERSEUSCLUS ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 1130 S PATTERN 1 1 TER5 ------------------------------------------------------------------------------------------------------------------------------------ 2 PERSEUSCLUS ACS/WFC ACCUM WFCENTER F555W CR-SPLIT=2 1 1130 S PATTERN 1 2 TER5 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 05 1 1 none none 1 1 tbd 05 1 1 none none 2 1 tbd 05 1 2 none none 1 1 tbd 05 1 2 none none 2 1 tbd 05 2 1 none none 1 2 592.0 05 2 1 none none 2 2 592.0 05 2 2 none none 1 2 592.0 05 2 2 none none 2 2 592.0 10201( 3) - 06/01/04 10:36 - [ 10] Visit: 06 Visit Priority: Visit Requirements: ORIENT 0.0D TO 15.5 D; ORIENT 85.0D TO 95.0 D; ORIENT 175.0D TO 185.0 D; ORIENT 265.0D TO 275.0 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PERSEUSCLUS ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=2 1 1130 S PATTERN 1 1 TER6 ------------------------------------------------------------------------------------------------------------------------------------ 2 PERSEUSCLUS ACS/WFC ACCUM WFCENTER F555W CR-SPLIT=2 1 1130 S PATTERN 1 2 TER6 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 06 1 1 none none 1 1 tbd 06 1 1 none none 2 1 tbd 06 1 2 none none 1 1 tbd 06 1 2 none none 2 1 tbd 06 2 1 none none 1 2 592.0 06 2 1 none none 2 2 592.0 06 2 2 none none 1 2 592.0 06 2 2 none none 2 2 592.0 10201( 3) - 06/01/04 10:36 - [ 11] Summary Form for Proposal 10201 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=2 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 0.0D TO 15.5 D; ORIENT 85.0D TO 95.0 D; ORIENT 175.0D TO 185.0 D; ORIENT 265.0D TO 275.0 D PATTERN 1 1 PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F814W F555W ------------------------------------------------------------------------------------------------------------------------------------ Target Names PERSEUSCLUSTER1 PERSEUSCLUSTER2 PERSEUSCLUSTER3 PERSEUSCLUSTER4 PERSEUSCLUSTER5 PERSEUSCLUSTER6 ------------------------------------------------------------------------------------------------------------------------------------