Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 2534c Report Date: 09-May-96:17:10 Version: ********** Check-in Date: ********** 1.Proposal Title: HIGH RESOLUTION IMAGING OF THE GALACTIC CENTER AT 1 MICRON ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID STELLAR POPULATIONS GO 1 Long Term yrs 2534 Sub Category GALACTIC CENTER ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Prof. Eric E. Becklin UCLA USA 213-206-0208 PROF. ------------------------------------------------------------------------------------ 7. Abstract We propose to acquire a deep 1 micron image of the Galactic center using the PC configuration of the HST. With such an image, it will be possible to resolve structure on a scale of about 1000 AU at the Galactic center, thereby providing valuable morphological information about the complex IRS 16 region. The acquired data will also provide intrinsic color information about stars in the Galactic center and establish an astrometric base that can be used in the future to measure the proper motions of the stars in and around IRS 16. ------------------------------------------------------------------------------------ 8. Scientific Key Words: STELLAR CLUSTER ; GALACTIC NUCLEUS ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 3.20 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: WF/PC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 2534c PI: Prof. Eric E. Becklin Proposal Title: HIGH RESOLUTION IMAGING OF THE GALACTIC CENTER AT 1 MICRON ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Dr. Doug A. Simons HAWAII, UNIVERSITY OF USA Dr. J. P. Henry HAWAII, UNIVERSITY OF USA P.I. Eric E. Becklin UNIVERSITY OF CALIFORNIA AT LOS USA ANGELES ------------------------------------------------------------------------------------ 3. Description of proposed observations. A SERIES OF EXPOSURES WILL BE ACQUIRED WITH THE PC CONFIGURATION AND THE F1024M FILTER WHICH SHUOLD RESOLVE THE VARIOUS COMPONENTS OF IRS 16 WITH SIZES GREATER THAN 0.1". ALSO, FOUR 200S EXPOSURES USING THE PC CONFIGURATION AND F785LP FILTER WILL BE ACQUIRED TO IDENTIFY FIELD STARS THAT MAY CREATE CONFUSION IN RESOLVING THE COMPONENTS OF IRS 16. PREVIOUS WORK BY HENRY ET AL. (AP. J. LETTERS, 285, L27, 1984) HAS ALREADY REVEALED A STAR WITH A 0.98 MICRON MAGNITUDE OF ABOUT 18, ROUGHLY 1" FROM IRS 16C AND THE PROPOSED COADDED 200S EXPOSURES WILL BE USEFUL IN OUR EFFORTS TO IDENTIFY FLUX FROM THIS STAR IN THE LONGER WAVELENGTH EXPOSURES. ------------------------------------------------------------------------------------ 11. Address Information Name: ERIC E. BECKLIN Category: PI Institution: UNIVERSITY OF CALIFORNIA AT LOS A Address: DEPARTMENT OF ASTRONOMY MATH AND SCIENCE BUILDING 405 HILGARD AVENUE City: LOS ANGELES State: CA Zip Code: 90024 Country: USA Telephone: (213)-806-0208 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 2534c [ 3] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial |Acqui|FLX| Flux data No | Name | Description | Position |Eqnx | Vel. |Prblm|REF| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 1 GALACTIC- STAR CLUSTER AT CENTER RA = 17H 42M 28.9S +/- 1950 1 F(10420) = 12 +/- 5 E-18 CENTER SGR-A OF MILKY WAY 0.07S, 2 F(8800) = 9 +/- 2 E-18 -STAR IRS-16 DEC = -28D 59' 23" +/- 1" Comments: IMAGE OF GALACTIC CENTER AT 10420 AND 8800 A NUM 1 = IRS 16C NUM 2 = IRR1 FLAT FIELDS FOR THE 10420 DATA MUST ALSO BE OBTAINED. THESE EXPOSURES HAVE NOT BEEN INCORPORATED INTO THE LOG SHEET, IN ACCORD WITH THE ADVICE WE RECEIVED FROM STSCI. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 2534c [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 GALACTIC- PC IMAGE P6 F1042M 10420 PRE-FLASH=YES 16 230S 10 1 1 CYCLE 1 CENTER CLOCKS=YES SEQ 1-2 NO GAP GUID TOL 0.050" Comments: WE REQUIRE ONLY COARSE TRACK FOR ALL EXPOSURES - NOT FINE LOCK ------------------------------------------------------------------------------------------------------------------------------------ 2 GALACTIC- PC IMAGE P6 F785LP 8800 PRE-FLASH=YES 4 200S 10 2 1 CYCLE 1 CENTER CLOCKS=YES SEQ 1-2 NO GAP PURGE=YES GUID TOL 0.050" ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 2534c [ 5] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations PC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters PRE-FLASH=YES CLOCKS=YES PURGE=YES ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 3.20 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category STELLAR POPULATIONS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category GALACTIC CENTER ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 1 SEQ 1-2 NO GAP GUID TOL 0.050" ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F1042M F785LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names GALACTIC-CENTER SGR-A-STAR IRS-16 ------------------------------------------------------------------------------------------------------------------------------------