8200( 5) - 06/01/00 08:22 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 8200 Version: 5 Check-in Date: 01-Jun-2000 08:20:58 1.Proposal Title: Globular Cluster Systems in Three Giant Coma Ellipticals ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 8 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: William Harris McMaster University CoI: Dr. William Baum University of Washington N CoI: Dr. J.J. Kavelaars McMaster University N CoI: Dr. David Hanes Queen's University N CoI: Dr. Christopher Pritchet University of Victoria N ------------------------------------------------------------------------------------ 5. Abstract What we know about the Coma ellipticals so far (NGC 4874, 4881, IC 4051 from Cycle 4, 5) present serious challenges to virtually every one of the current formation scenarios for globular cluster systems. Coma is the densest and richest cluster of galaxies in which globular cluster populations lie within reach of the HST cameras. We will investigate this rich proving ground further by deep V, I WFPC2 imaging of two more of its giant ellipticals: the central (non-cD) supergiant NGC 4889, and a normal isolated luminous gE in the core region, NGC 4926. These targets will extend the range of parameter space that we have sampled in the systematics of globular cluster populations. ------------------------------------------------------------------------------------ Observations Description ------------------------ These observations will reach V_limit = 28.5 in a series of 12 full-orbit exposures in F606W for point sources in the target fields centered on the two Coma giant ellipticals. This limiting magnitude extends well past the expected peak in the globular cluster luminosity function (GCLF). Additional shorter- exposure (4-orbit) exposures in F814W will provide color determinations and metallicity distributions for the globular clusters. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 8200( 5) - 06/01/00 08:22 - [ 2] Data Distribution Paper Products: NO Media: ELECTRONIC Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 8200( 5) - 06/01/00 08:22 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC4889- GALAXY, ELLIPTICAL, RA=13H 0M 8.10S +/- 1", DEC=27D J2000 V = 6494 V = 27.8+/-0.2 DITHER1 BGM, NUCLEUS, EXT- 58' 37" +/- 1.0" V-I = 1 CLUSTER, GLOBULAR CLUSTER Coordinate Source: Comments: Flux/Color corresponds to mean mag/color of globular clusters in the galaxy's halo. 2 NGC4889- GALAXY, ELLIPTICAL, XI-OFF=0.5"+/- 0.05", ETA- J2000 V = 6494 V = 27.8+/-0.2 DITHER2 BGM, NUCLEUS, EXT- OFF=0.25"+/- 0.05", FROM 1 V-I = 1 CLUSTER, GLOBULAR CLUSTER Coordinate Source: Comments: Flux/Color corresponds to mean mag/color of globular clusters in the galaxy's halo. 3 NGC4889- GALAXY, ELLIPTICAL, XI-OFF=0.75"+/- 0.05", ETA- J2000 V = 6494 V = 27.8+/-0.2 DITHER3 BGM, NUCLEUS, EXT- OFF=0.75"+/- 0.05", FROM 1 V-I = 1 CLUSTER, GLOBULAR CLUSTER Coordinate Source: Comments: Flux/Color corresponds to mean mag/color of globular clusters in the galaxy's halo. 4 NGC4889- GALAXY, ELLIPTICAL, XI-OFF=0.25"+/- 0.05", ETA- J2000 V = 6494 V = 27.8+/-0.2 DITHER4 BGM, NUCLEUS, EXT- OFF=0.5"+/- 0.05", FROM 1 V-I = 1 CLUSTER, GLOBULAR CLUSTER Coordinate Source: Comments: Flux/Color corresponds to mean mag/color of globular clusters in the galaxy's halo. 5 NGC4926- GALAXY, ELLIPTICAL, RA=13H 1M 53.7S +/- 1", DEC=27D J2000 V = 7892 V = 27.8+/-0.2 DITHER1 NUCLEUS, EXT-CLUSTER, 37' 28.9" +/- 1.0" V-I = 1 GLOBULAR CLUSTER Coordinate Source: Comments: Flux/Color corresponds to mean mag/color of globular clusters in the galaxy's halo. 6 NGC4926- GALAXY, ELLIPTICAL, XI-OFF=0.5"+/- 0.05", ETA- J2000 V = 7892 V = 27.8+/-0.2 DITHER2 NUCLEUS, EXT-CLUSTER, OFF=0.25"+/- 0.05", FROM 5 V-I = 1 GLOBULAR CLUSTER Coordinate Source: Comments: Flux/Color corresponds to mean mag/color of globular clusters in the galaxy's halo. 7 NGC4926- GALAXY, ELLIPTICAL, XI-OFF=0.75"+/- 0.05", ETA- J2000 V = 7892 V = 27.8+/-0.2 DITHER3 NUCLEUS, EXT-CLUSTER, OFF=0.75"+/- 0.05", FROM 5 V-I = 1 GLOBULAR CLUSTER Coordinate Source: Comments: Flux/Color corresponds to mean mag/color of globular clusters in the galaxy's halo. 8 NGC4926- GALAXY, ELLIPTICAL, XI-OFF=0.25"+/- 0.05", ETA- J2000 V = 7892 V = 27.8+/-0.2 DITHER4 NUCLEUS, EXT-CLUSTER, OFF=0.5"+/- 0.05", FROM 5 V-I = 1 GLOBULAR CLUSTER Coordinate Source: Comments: Flux/Color corresponds to mean mag/color of globular clusters in the galaxy's halo. 8200( 5) - 06/01/00 08:22 - [ 4] Visit: 01 Visit Priority: Visit Requirements: ORIENT 145D TO 225D On Hold Comments: Additional Comments: ORIENTation ensures that the V=13.5 bright star southeast of the galaxy does not fall onto any of the WF chips. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC4889-DIT WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 2300 S EXPAND END ORBIT LOW-SKY HER1 ------------------------------------------------------------------------------------------------------------------------------------ 20 NGC4889-DIT WFPC2 IMAGE PC1-FIX F606W CR-SPLIT=NO 3 2300 S EXPAND END ORBIT LOW-SKY HER1 ------------------------------------------------------------------------------------------------------------------------------------ 8200( 5) - 06/01/00 08:22 - [ 5] Visit: 02 Visit Priority: Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: ORIENTation ensures that the V=13.5 bright star southeast of the galaxy does not fall onto any of the WF chips. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC4889-DIT WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 2300 S EXPAND END ORBIT LOW-SKY HER2 ------------------------------------------------------------------------------------------------------------------------------------ 20 NGC4889-DIT WFPC2 IMAGE PC1-FIX F606W CR-SPLIT=NO 3 2300 S EXPAND END ORBIT LOW-SKY HER2 ------------------------------------------------------------------------------------------------------------------------------------ 8200( 5) - 06/01/00 08:22 - [ 6] Visit: 03 Visit Priority: Visit Requirements: ORIENT 95D to 115D BEFORE 15-JUL-2000 On Hold Comments: Additional Comments: ORIENTation ensures that the V=13.5 bright star southeast of the galaxy does not fall onto any of the WF chips. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC4889-DIT WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=DEF 1 2300 S EXPAND END ORBIT LOW-SKY HER3 ------------------------------------------------------------------------------------------------------------------------------------ 20 NGC4889-DIT WFPC2 IMAGE PC1-FIX F606W CR-SPLIT=DEF 3 2300 S EXPAND END ORBIT LOW-SKY HER3 ------------------------------------------------------------------------------------------------------------------------------------ 8200( 5) - 06/01/00 08:22 - [ 7] Visit: 04 Visit Priority: Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: ORIENTation ensures that the V=13.5 bright star southeast of the galaxy does not fall onto any of the WF chips. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC4889-DIT WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 2300 S EXPAND END ORBIT LOW-SKY HER4 ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC4889-DIT WFPC2 IMAGE PC1-FIX F606W CR-SPLIT=NO 3 2300 S EXPAND END ORBIT LOW-SKY HER4 ------------------------------------------------------------------------------------------------------------------------------------ 8200( 5) - 06/01/00 08:22 - [ 8] Visit: 05 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC4926-DIT WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 2300 S EXPAND END ORBIT LOW-SKY HER1 ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC4926-DIT WFPC2 IMAGE PC1-FIX F606W CR-SPLIT=NO 3 2300 S EXPAND END ORBIT LOW-SKY HER1 ------------------------------------------------------------------------------------------------------------------------------------ 8200( 5) - 06/01/00 08:22 - [ 9] Visit: 06 Visit Priority: Visit Requirements: SAME ORIENT AS 05 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC4926-DIT WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 2300 S EXPAND END ORBIT LOW-SKY HER2 ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC4926-DIT WFPC2 IMAGE PC1-FIX F606W CR-SPLIT=NO 3 2300 S EXPAND END ORBIT LOW-SKY HER2 ------------------------------------------------------------------------------------------------------------------------------------ 8200( 5) - 06/01/00 08:22 - [ 10] Visit: 07 Visit Priority: Visit Requirements: SAME ORIENT AS 05 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC4926-DIT WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 2300 S EXPAND END ORBIT LOW-SKY HER3 ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC4926-DIT WFPC2 IMAGE PC1-FIX F606W CR-SPLIT=NO 3 2300 S EXPAND END ORBIT LOW-SKY HER3 ------------------------------------------------------------------------------------------------------------------------------------ 8200( 5) - 06/01/00 08:22 - [ 11] Visit: 08 Visit Priority: Visit Requirements: SAME ORIENT AS 05 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC4926-DIT WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 2300 S EXPAND END ORBIT LOW-SKY HER4 ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC4926-DIT WFPC2 IMAGE PC1-FIX F606W CR-SPLIT=NO 3 2300 S EXPAND END ORBIT LOW-SKY HER4 ------------------------------------------------------------------------------------------------------------------------------------ 8200( 5) - 06/01/00 08:22 - [ 12] Summary Form for Proposal 8200 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PC1-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO CR-SPLIT=DEF ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 145D TO 225D EXPAND END ORBIT LOW-SKY SAME ORIENT AS 01 ORIENT 95D to 115D BEFORE 15-JUL-2000 SAME ORIENT AS 05 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F814W F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC4889-DITHER1 NGC4889-DITHER2 NGC4889-DITHER3 NGC4889-DITHER4 NGC4926-DITHER1 NGC4926-DITHER2 NGC4926-DITHER3 NGC4926-DITHER4 ------------------------------------------------------------------------------------------------------------------------------------