Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5301 Report Date: 18-Jul-95:17:07 Version: ********** Check-in Date: ********** 1.Proposal Title: STRUCTURE AND POPULATIONS OF GLOBULAR CLUSTERS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID COOL STARS GO Sub Category OLD CLUSTERS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Ivan R. King UNIV. OF CALIF., BERKELEY U.S.A. 510-642-2206 ------------------------------------------------------------------------------------ 7. Abstract The globular clusters Omega Centauri and 47 Tucanae will be observed with the "B" and "V" filters of the FOC f/96. An 80-min total in each color will reach well down the main sequence in each cluster, to fainter limiting magnitude than ground-based observations, in central regions that ground-based observations cannot resolve at all. Three FOC fields will be observed in each cluster: at the center, and one and three core radii out. One main objective is to observe the radial distributions of main-sequence stars of different mass, so as to determine the degree of equipartion at the center of each cluster. Along with this goes the luminosity function of the same stars. Another objective is to carry the CMD and luminosity functions as faint as possible. Also, the top of the white-dwarf sequence should be observable. This is a repeat of a program taken with the aberrated HST; it should now be possible, in these crowded regions, to go 3 to 5 magnitudes fainter. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 22.4 par: 0 10. Num targs pri: 6 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: FOC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5301 PI: Ivan R. King Proposal Title: STRUCTURE AND POPULATIONS OF GLOBULAR CLUSTERS ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Ivan R. King 1500 U.S.A. Adrienne Cool 1500 U.S.A. ------------------------------------------------------------------------------------ 3. Description of proposed observations. In each cluster, 3 FOC fields are observed with f/96. Exposure times: (for each of 3 fields) F430W, 80M; F480LP, 80M. Note that for NGC 104 (exp. lines 2- 7) all exposures can be taken with a single guide-star acquisition. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. Only HST can penetrate the centers of globular clusters to a faint limiting magnitude. These clusters have already been pushed as far as they can be with the aberrated HST, and it is now time to do them more deeply. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. NGC 104 (exp. lines 2-7) can be taken on a single guide-star acquisition. This is not a scientific requirement but will save spacecraft time. Also, this object is at times in the continuous-viewing zone. ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. None ------------------------------------------------------------------------------------ 8. Additional comments or special requests. None. ------------------------------------------------------------------------------------ 9. Description of previous HST work. Many proposals and publications. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). Several Sun workstations and a Microvax II GPX. Administrative support. ------------------------------------------------------------------------------------ 11. Address Information Name: IVAN R. KING Category: PI Institution: 1500 Address: ASTRONOMY DEPARTMENT UNIVERSITY OF CALIFORNIA City: BERKELEY State: CA Zip Code: 94720 Country: U.S.A. Telephone: 510-642-2206 Telex (or e-mail): king@bkyast.berkeley.edu ------------------------------------------------------------------------------------ Name: Category: CON Institution: Address: City: State: Zip Code: Country: Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5301 [ 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 NGC104 47 C,201 RA = 00H 24M 04.95S +/- 2000 TUC 0.1S, DEC = -72D 04' 51.8" +/-1" Comments: CENTER OF 47 TUC. TARGETS 1-3 CAN BE OBSERVED ON A SINGLE GSACQ. THESE THREE ARE CVZ TARGETS. ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC104-OFF-1 C,201 RA = 00H 24M 04.95S +/- 2000 47 TUC 0.1S, DEC = -72D 04' 26.8" +/-1" Comments: 1 CORE RADIUS N OF CENTER. ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC104-OFF-2 C,201 RA = 00H 24M 04.95S +/- 2000 47 TUC 0.1S, DEC = -72D 03' 36.8" +/-1" Comments: 3 CORE RADII N OF CENTER. ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC5139 C,201 RA = 13H 23M 45.8S +/- 0.1S, 1950 OMEGA CEN DEC = -47D 13' 03" +/- 1" ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC5139-OFF- C,201 RA = 13H 23M 45.8S +/- 0.1S, 1950 1 OMEGA CEN DEC = -47D 15' 38" +/- 1" Comments: 1 CORE RADIUS S OF CENTER. ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC5139-OFF- C,201 RA = 13H 23M 45.8S +/- 0.1S, 1950 2 OMEGA CEN DEC = -47D 20' 48" +/- 1" Comments: 3 CORE RADII S OF CENTER. ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC7078 M15 C,201 RA = 21H 29M 58.44S +/- 2000 0.05S, DEC = +12D 10' 00.6" +/- 0.5" Comments: CENTER OF M15. A NEIGHBORING FIELD IS TAKEN WITH A POS TARG. BOTH CAN BE OBSERVED ON A SINGLE GSACQ. ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC7078-OFF C,201 RA = 21H 29M 58.44S +/- 2000 M15 0.05S, DEC = +12D 10' 20.6" +/- 0.5" Comments: 20" N OF CENTER OF M15. THIS TARGET CAN ALSO BE OBSERVED ON SAME GSACQ AS TARGET 7. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5301 [ 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 DEFINE # FOC/96 IMAGE 512X512 # 2 1450S # OMEG1 ------------------------------------------------------------------------------------------------------------------------------------ 1.1 DEFINE # FOC/96 IMAGE 512X512 # 2 1699S # OMEG2 ------------------------------------------------------------------------------------------------------------------------------------ 1.2 DEFINE # FOC/96 IMAGE 512X512 # 1 1609S # OMEG2A ------------------------------------------------------------------------------------------------------------------------------------ 1.5 DEFINE # FOC/96 IMAGE 512X512 # 2 1960S # TUC1 ------------------------------------------------------------------------------------------------------------------------------------ 1.6 DEFINE # FOC/96 IMAGE 512X512 # 2 2209S # TUC2 ------------------------------------------------------------------------------------------------------------------------------------ 1.65 DEFINE # FOC/96 IMAGE 512X512 # 2 2127S # TUC3 ------------------------------------------------------------------------------------------------------------------------------------ 1.7 DEFINE # FOC/96 IMAGE 512X512 # 1 1931S # M15A ------------------------------------------------------------------------------------------------------------------------------------ 1.8 DEFINE # FOC/96 IMAGE 512X512 # 1 2429S # M15B ------------------------------------------------------------------------------------------------------------------------------------ 1.9 DEFINE # FOC/96 IMAGE 512X512 # 1 2265S # M15C ------------------------------------------------------------------------------------------------------------------------------------ 2 USE NGC104-OFF- F430W 1 SEQ 2-3 NO GAP TUC1 2 CYCLE 4 /2-19 Comments: LINES 2-7 CAN BE TAKEN ON A SINGLE GSACQ. ------------------------------------------------------------------------------------------------------------------------------------ 3 USE NGC104-OFF- F480LP 1 SAME ORIENT FOR 3 TUC2 2 AS 2 SAME POS FOR 3 AS 2 ------------------------------------------------------------------------------------------------------------------------------------ 4 USE NGC104 F480LP 1 SEQ 4-5 NO GAP TUC3 ------------------------------------------------------------------------------------------------------------------------------------ 5 USE NGC104 F430W 1 SAME ORIENT FOR 5 TUC2 AS 4 SAME POS FOR 5 AS 4 ------------------------------------------------------------------------------------------------------------------------------------ 6 USE NGC104-OFF- F430W 1 SEQ 6-7 NO GAP TUC3 1 ------------------------------------------------------------------------------------------------------------------------------------ 7 USE NGC104-OFF- F480LP 1 SAME ORIENT FOR 7 TUC2 1 AS 6 SAME POS FOR 7 AS 6 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5301 [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 8 USE NGC5139 F430W 1 SEQ 8,9 NO GAP OMEG1 ------------------------------------------------------------------------------------------------------------------------------------ 9 USE NGC5139 F480LP 1 SAME ORIENT FOR 9 OMEG2 AS 8 SAME POS FOR 9 AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 9.5 USE NGC5139 F480LP 1 SAME ORIENT FOR OMEG2A 9.5 AS 8 SAME POS FOR 9.5 AS 8 Comments: LINES 9.5,9.6 PUT TOTAL SLIGHTLY OVER ALLOCATION. SHORTEN EXP-TIME IF YOU MUST; IF SO, SHORTEN 9.5 AND 9.6 BY SAME AMOUNT. ------------------------------------------------------------------------------------------------------------------------------------ 9.6 USE NGC5139 F430W 1 SAME ORIENT FOR OMEG2A 9.6 AS 8 SAME POS FOR 9.6 AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 10 USE NGC5139-OFF F430W 1 SEQ 10,11 NO GAP OMEG1 -1 ------------------------------------------------------------------------------------------------------------------------------------ 11 USE NGC5139-OFF F480LP 1 SAME ORIENT FOR 11 OMEG2 -1 AS 10 SAME POS FOR 11 AS 10 ------------------------------------------------------------------------------------------------------------------------------------ 12 USE NGC5139-OFF F430W 1 SEQ 12,13 NO GAP OMEG1 -2 ------------------------------------------------------------------------------------------------------------------------------------ 13 USE NGC5139-OFF F480LP 1 SAME ORIENT FOR 13 OMEG2 -2 AS 12 SAME POS FOR 13 AS 12 ------------------------------------------------------------------------------------------------------------------------------------ 14 USE NGC7078 F430W 1 SEQ 14,15 NO GAP M15A Comments: LINES 14-19 CAN BE TAKEN ON A SINGLE GSACQ. ------------------------------------------------------------------------------------------------------------------------------------ 15 USE NGC7078 F480LP 1 SAME ORIENT FOR 15 M15B AS 14 SAME POS FOR 15 AS 14 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5301 [ 6] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 16 USE NGC7078 F430W 1 SEQ 16,17 NO GAP M15C POS TARG 0.0,6.0 SAME ORIENT FOR 16 AS 14 ------------------------------------------------------------------------------------------------------------------------------------ 17 USE NGC7078 F480LP 1 SAME ORIENT FOR 17 M15B AS 16 SAME POS FOR 17 AS 16 ------------------------------------------------------------------------------------------------------------------------------------ 18 USE NGC7078-OFF F430W 1 SEQ 18,19 NO GAP M15C ------------------------------------------------------------------------------------------------------------------------------------ 19 USE NGC7078-OFF F480LP 1 SAME ORIENT FOR 19 M15B AS 18 SAME POS FOR 19 AS 18 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5301 [ 7] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOC/96 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 22.4 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category COOL STARS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category OLD CLUSTERS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SEQ 2-3 NO GAP; CYCLE 4 /2-19 SAME ORIENT FOR 3 AS 2; SAME POS FOR 3 AS 2 SEQ 4-5 NO GAP SAME ORIENT FOR 5 AS 4; SAME POS FOR 5 AS 4 SEQ 6-7 NO GAP SAME ORIENT FOR 7 AS 6; SAME POS FOR 7 AS 6 SEQ 8,9 NO GAP SAME ORIENT FOR 9 AS 8; SAME POS FOR 9 AS 8 SAME ORIENT FOR 9.5 AS 8; SAME POS FOR 9.5 AS 8 SAME ORIENT FOR 9.6 AS 8; SAME POS FOR 9.6 AS 8 SEQ 10,11 NO GAP SAME ORIENT FOR 11 AS 10; SAME POS FOR 11 AS 10 SEQ 12,13 NO GAP SAME ORIENT FOR 13 AS 12; SAME POS FOR 13 AS 12 SEQ 14,15 NO GAP SAME ORIENT FOR 15 AS 14; SAME POS FOR 15 AS 14 SEQ 16,17 NO GAP; POS TARG 0.0,6.0; SAME ORIENT FOR 16 AS 14 SAME ORIENT FOR 17 AS 16; SAME POS FOR 17 AS 16 SEQ 18,19 NO GAP; SAME ORIENT FOR 19 AS 18; SAME POS FOR 19 AS 18 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements # F430W F480LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC104 47 TUC NGC104-OFF-1 NGC104-OFF-2 NGC5139 OMEGA CEN NGC5139-OFF-1 NGC5139-OFF-2 NGC7078 M15 NGC7078-OFF ------------------------------------------------------------------------------------------------------------------------------------