7426( 7) - 10/27/97 10:44 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 7426 Version: 7 Check-in Date: 27-Oct-1997 10:42:58 1.Proposal Title: NICMOS Imaging of Red Giants in M32 ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 7 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: GUY WORTHEY ST. AMBROSE UNIVERSITY CoI: Carl Grillmair Jet Propulsion Laboratory N CoI: Tod Lauer National Optical Astronomy Observatories N CoI: Sandra Faber University of California, Santa Cruz N ------------------------------------------------------------------------------------ 5. Abstract In just two orbits, the number, temperatures, and luminosities of red giants at ~1.8 R_e in M32 will be fully revealed by combining NICMOS 1.6Mu images with this team's previous WFPC2 V and I data (Grillmair et al. 1996, AJ, 112, 1975; GTO 5435). The resulting I-H color-magnitude data will test the reality of infrared-bright giants seen in ground-based data. Further, the WFPC2+NICMOS data combination will allow these stars to be located in the V-I CMD, which could not be done previously. The colors of the bright giants translate almost directly into an abundance distribution, and the Grillmair et al. abundance distribution will be refined by consideration of the reduced color errors in the combined data. Because younger populations have a less luminous first-ascent giant branch (RGB) tip, the new, reliable luminosity function to ~2 mag below the old-age RGB tip will measure the amount of age<2 Gyr population present to an extent limited by counting statistics. The data will solidly define the helium shell-burning asymptotic giant branch population for later interpretation as the theory of the AGB grows more mature. In parallel, WFPC2 will obtain V and I photometry in fields to the NE of M32 to track changes in the abundance distribution with radius in M31. ------------------------------------------------------------------------------------ 7426( 7) - 10/27/97 10:44 - [ 2] Observations Description ------------------------ NICMOS camera 2 with F160W will be dithered to 4 overlapping positions to cover a previous PC-chip frame of an area south of the nucleus of M32 (NGC221-POS1 from GTO 5435). Camera 1 will be used in parallel, overlapping previous WF4 coverage. Also in parallel, WFPC2 will take V- and I-band images in the M32+M31 fields 7.5 arcmin N.E. with F606W and F814W, one exposure per telescope pointing for a total of roughly 500s in each filter. Due to mild contamination of M31 stars at this location in M32, this procedure will be repeated on an M31 control field 6 arcmin to the N.E. (NGC221-POS2 from GTO 5435). Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- RPS2 returns a feasability diagnostic related to too-large POS TARGs. This should be ignored because it is the intention of the proposal to cover a wide field of view rather than concentrate on one object. We realize "grot" is a problem. ------------------------------------------------------------------------------------ Data Distribution Media: ELECTRONIC Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 7426( 7) - 10/27/97 10:44 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC221-POS1- GALAXY,ELLIPTICAL RA=10.6749910089D +/- 0.0001D, J2000 SURF(V) = 21.0 NIC DEC=40.84540032976D +/- 0.0001D B-V = 0.87 3 NGC221-POS2- GALAXY,ELLIPTICAL RA=10.76643809D +/- J2000 SURF(V) = 22.0 NIC 0.0001D,DEC=40.91352962D +/- B-V = 0.8 0.0001D Comments: This is a control field N.E. of POS1 in the disk of NGC224 7426( 7) - 10/27/97 10:44 - [ 4] Visit: 01 Visit Priority: Visit Requirements: ORIENT 84D TO 85D 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 ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC221-POS1 NIC2 MULTIAC NIC2-FI F160W SAMP-SEQ=STEP64,NSAMP=19 1 DEF PARallel 2,3 WITH 1 -NIC CUM X Comments: Primary NIC2 Obs, 1 of 4 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC221-POS1 NIC1 MULTIAC NIC1-FI F160W SAMP-SEQ=STEP64,NSAMP=19 1 DEF -NIC CUM X Comments: Parallel NIC1 Obs ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC221-POS1 WFPC2 IMAGE WFALL F814W 1 350 S -NIC Comments: Parallel WFPC2 Obs ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC221-POS1 NIC2 MULTIAC NIC2-FI F160W SAMP-SEQ=STEP32,NSAMP=25 1 DEF POSition TARget 0.0, -NIC CUM X 14.8; PARallel 5,6 WITH 4 Comments: Primary NIC2 Obs, 2 of 4 ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC221-POS1 NIC1 MULTIAC NIC1-FI F160W SAMP-SEQ=STEP32,NSAMP=25 1 DEF -NIC CUM X Comments: Parallel NIC1 Obs ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC221-POS1 WFPC2 IMAGE WFALL F814W 1 260 S -NIC Comments: Parallel WFPC2 Obs ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC221-POS1 NIC2 MULTIAC NIC2-FI F160W SAMP-SEQ=STEP64,NSAMP=19 1 DEF POSition TARget 14.8, -NIC CUM X 14.8; PARallel 8,9 WITH 7 Comments: Primary NIC2 Obs, 3 of 4 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC221-POS1 NIC1 MULTIAC NIC1-FI F160W SAMP-SEQ=STEP64,NSAMP=19 1 DEF -NIC CUM X Comments: Parallel NIC1 Obs ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC221-POS1 WFPC2 IMAGE WFALL F606W 1 350 S -NIC Comments: Parallel WFPC2 Obs ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC221-POS1 NIC2 MULTIAC NIC2-FI F160W SAMP-SEQ=STEP32,NSAMP=25 1 DEF POSition TARget 14.8, -NIC CUM X 0.0; PARallel 11,12 WITH 10 Comments: Primary NIC2 Obs, 4 of 4 ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC221-POS1 NIC1 MULTIAC NIC1-FI F160W SAMP-SEQ=STEP32,NSAMP=25 1 DEF -NIC CUM X Comments: Parallel NIC1 Obs ------------------------------------------------------------------------------------------------------------------------------------ 7426( 7) - 10/27/97 10:44 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC221-POS1 WFPC2 IMAGE WFALL F606W 1 350 S -NIC Comments: Parallel WFPC2 Obs ------------------------------------------------------------------------------------------------------------------------------------ 7426( 7) - 10/27/97 10:44 - [ 6] Visit: 02 Visit Priority: Visit Requirements: ORIENT 59D TO 60D 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 ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC221-POS2 NIC2 MULTIAC NIC2-FI F160W SAMP-SEQ=STEP64,NSAMP=19 1 DEF PARallel 2,3 WITH 1 -NIC CUM X Comments: Primary NIC2 Obs, 1 of 4 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC221-POS2 NIC1 MULTIAC NIC1-FI F160W SAMP-SEQ=STEP64,NSAMP=19 1 DEF -NIC CUM X Comments: Parallel NIC1 Obs ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC221-POS2 WFPC2 IMAGE WFALL F814W 1 350 S -NIC Comments: Parallel WFPC2 Obs ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC221-POS2 NIC2 MULTIAC NIC2-FI F160W SAMP-SEQ=STEP32,NSAMP=25 1 DEF POSition TARget 0.0, -NIC CUM X 14.8; PAR 5,6 WITH 4 Comments: Primary NIC2 Obs, 2 of 4 ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC221-POS2 NIC1 MULTIAC NIC1-FI F160W SAMP-SEQ=STEP32,NSAMP=25 1 DEF -NIC CUM X Comments: Parallel NIC1 Obs ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC221-POS2 WFPC2 IMAGE WFALL F814W 1 260 S -NIC Comments: Parallel WFPC2 Obs ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC221-POS2 NIC2 MULTIAC NIC2-FI F160W SAMP-SEQ=STEP64,NSAMP=19 1 DEF POSition TARget 14.8, -NIC CUM X 14.8; PAR 8,9 WITH 7 Comments: Primary NIC2 Obs, 3 of 4 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC221-POS2 NIC1 MULTIAC NIC1-FI F160W SAMP-SEQ=STEP64,NSAMP=19 1 DEF -NIC CUM X Comments: Parallel NIC1 Obs ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC221-POS2 WFPC2 IMAGE WFALL F606W 1 350 S -NIC Comments: Parallel WFPC2 Obs ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC221-POS2 NIC2 MULTIAC NIC2-FI F160W SAMP-SEQ=STEP32,NSAMP=25 1 DEF POSition TARget 14.8, -NIC CUM X 0.0; PAR 11,12 WITH 10 Comments: Primary NIC2 Obs, 4 of 4 ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC221-POS2 NIC1 MULTIAC NIC1-FI F160W SAMP-SEQ=STEP32,NSAMP=25 1 DEF -NIC CUM X Comments: Parallel NIC1 Obs ------------------------------------------------------------------------------------------------------------------------------------ 7426( 7) - 10/27/97 10:44 - [ 7] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC221-POS2 WFPC2 IMAGE WFALL F606W 1 350 S -NIC Comments: Parallel WFPC2 Obs ------------------------------------------------------------------------------------------------------------------------------------ 7426( 7) - 10/27/97 10:44 - [ 8] Summary Form for Proposal 7426 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations NIC2 NIC1 WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SAMP-SEQ=STEP64 NSAMP=19 NSAMP=25 SAMP-SEQ=STEP32 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 84D TO 85D PARallel 2,3 WITH 1 POSition TARget 0.0, 14.8; PARallel 5,6 WITH 4 POSition TARget 14.8, 14.8; PARallel 8,9 WITH 7 POSition TARget 14.8, 0.0; PARallel 11,12 WITH 10 ORIENT 59D TO 60D POSition TARget 0.0, 14.8; PAR 5,6 WITH 4 POSition TARget 14.8, 14.8; PAR 8,9 WITH 7 POSition TARget 14.8, 0.0; PAR 11,12 WITH 10 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W F814W F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC221-POS1-NIC NGC221-POS2-NIC ------------------------------------------------------------------------------------------------------------------------------------