6284( 0) - 07/18/95 21:51 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6284 Version: ********** Check-in Date: ********** 1.Proposal Title: Stellar Populations in the Local Group ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle Stellar Populations GTO/WFC 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: James Westphal California Institute of Technology CoI: Deidre Hunter Lowell Observatory Y ------------------------------------------------------------------------------------ 6. Abstract In Cycle 4 we obtained WFPC2 images of a portion of the OB association NGC 206 in M31 for the purpose of determining the Initial Mass Function of the intermediate mass stars. In this program we are obtaining a background field in order to be able to subtract, statistically, stars in the NGC 206 field that are not members of the association. This is necessary in order to determine a true IMF of the association. ------------------------------------------------------------------------------------ Observations Description ------------------------ The exposures of the background field are intended to duplicate what was done for the NGC 206 field itself. This involves F336W, F555W, and F814W exposures. Each is split for purposes of removing cosmic-rays. Since the original exposures occupied one and a fraction orbits, we have scaled back the F336W exposure in order to fit everything into one orbit. Real Time Justification ----------------------- Not applicable. Calibration Justification ------------------------- Not applicable. Additional Comments ------------------- Not applicable. ------------------------------------------------------------------------------------ 6284( 0) - 07/18/95 21:51 - [ 2] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6284( 0) - 07/18/95 21:51 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC206- EXT-CLUSTER,OB RA=0H 38M 07.9S +/- 0.1S, 1950 V=-300 V=18 +/- 0.5 BACKGROUND ASSOCIATION,DISK DEC=40D 24' 51.0" +/- 5" Comments: This V refers to the top end. The bottom is 25.5 and the starsare red III. 6284( 0) - 07/18/95 21:51 - [ 4] Visit: 01 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 ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC206- WFPC2 IMAGE WFALL- F555W ATD-GAIN=7,CR- 2 200S BACKGROUND FIX SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC206- WFPC2 IMAGE WFALL- F814W ATD-GAIN=7,CR- 2 200S BACKGROUND FIX SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC206- WFPC2 IMAGE WFALL- F336W ATD-GAIN=7,CR- 1 300S BACKGROUND FIX SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC206- WFPC2 IMAGE WFALL- F336W ATD-GAIN=7,CR- 1 400S SEQ 1-3 NON-INT BACKGROUND FIX SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 6284( 0) - 07/18/95 21:51 - [ 5] Summary Form for Proposal 6284 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN=7 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GTO/WFC ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category Stellar Populations ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SEQ 1-3 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F555W F814W F336W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC206-BACKGROUND ------------------------------------------------------------------------------------------------------------------------------------