Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 3942c Report Date: 09-May-96:18:58 Version: ********** Check-in Date: ********** 1.Proposal Title: GTO - R136 - CYCLES 2-5 EXPOSURES ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID STELLAR ASTROPHYSICS GTO/HRS Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Dr. Dennis C. Ebbets BALL AEROSPACE SYSTEMS USA (303) 939-5964 PRIN MEM TECH STAFF ------------------------------------------------------------------------------------ 7. Abstract R136 is the bright central object of the 30 Doradus nebula in the LMC. It contains an unusually tight grouping of very massive and luminous O and Wolf-Rayet type stars. The brightest recognizeable component, called R136A1, is itself a very close double. Detailed studies of the individual components have been hampered by a lack of sufficient spatial resolution. The High Resolution Spectrograph will be used to obtain detailed ultraviolet spatial and spectral information about the five or so brightest discrete components. The goal of the program is to study the spectral morphology, stellar wind characteristics, ultraviolet luminosities and ultimately the masses included in this unusual and interesting object. redlined for phase 2, 7/19/88, dce updated for cycle 1 phase 2 9/21/89 revised lines 1-7 for cycle zero 11/15/90 Revised for cycle 1 exposures February 09, 1991 Revised for cycles 2-5 May 22, 1991 This prop contains only cycle 2-5 exposures ------------------------------------------------------------------------------------ 8. Scientific Key Words: SUPERGIANT STAR, WOLF-RAYET STAR, MASS LOSS, LMC 30 DORADUS ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 16.04 par: 0 10. Num targs pri: 6 par: 0 ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 3942c PI: Dr. Dennis C. Ebbets Proposal Title: GTO - R136 - CYCLES 2-5 EXPOSURES ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Blair D. Savage WISCONSIN, UNIVERSITY OF USA Dennis C. Ebbets BALL AEROSPACE CORPORATION USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. Cycle 2 baseline time: R136A1 SSA G160M Wavelengths = 1250, 1380, 1542 S/N = 10 Cycle 2 augmentation requested R136A1 SSA G160M S/N > 20 to be recovered partial recovery of science in original plan Cycle 2 augmentation requested R136A3 plus nearby sky SSA G140L Cycle 5 post costar baseline time R136A1, R136A4, R136B, R136C SSA G140L Wavelengths 1362.5, 1642.5 ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. R136 has been studied extensively from the ground with imagery and spectroscopy. Over a dozen observations have been made with the IUE. Much has been learned from these studies, but all have been ultimately limited by the finite spatial resolution allowed by the atmosphere and the instruments. The GHRS will have the spatial resolution, sensitivity and spectral resolving power to provide high quality ultraviolet spectra of each component. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. R136 is a very crowded field. Successful completion of this program requires that the component being observed be precisely centered in the 0.25 arc sec aperture. We request real time target acquisition capability, to ensure that the centering is adequate, and to make adjustments to the pointing if necessary. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. The spectra will be calibrated and reduced using standard procedures either in RSDP, or the IDT facilities. The spectrum of R136A1 will be studied in terms of gross spectral morphologhy, for the purposes of classification. Stellar wind diagnostics such as terminal velocities and mass loss rates will be derived from comparison of line profiles with model predictions and experience with similar stars. The ultraviolet spectral energy distributions will be studied by correcting for now known effects of galactic and LMC extinction. ------------------------------------------------------------------------------------ 13. The High Resolution Spectrograph will be used to observe the UV spectrum of the bright components of R136. The brightest member, R136a1 will be observed in cycle 2 at medium resolution with G160M, to study important interstellar lines in the LMC and MW halo gas. The fainter stellar components, R136A3, R136A4, R136B and R136C will be observed with the G140L grating to study their stellar parameters. ------------------------------------------------------------------------------------ 11. Address Information Name: BLAIR D. SAVAGE Category: CON Institution: UNIVERSITY OF WISCONSIN Address: DEPARTMENT OF ASTRONOMY 475 N. CHARTER ST. City: MADISON State: WI Zip Code: 53706 Country: USA Telephone: (608) 262-4909 Telex (or e-mail): ------------------------------------------------------------------------------------ Page 3 Name: DENNIS C. EBBETS Category: PI Institution: BALL AEROSPACE SYSTEMS Address: GHRS PROJECT AR-1 P.O. BOX 1062 City: BOULDER State: CO Zip Code: 80306 Country: USA Telephone: (303) 939-5964 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 3942c [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 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 R136A1 BRIGHTEST COMPONENT OF RA = 5H 38M 42.50S +/- 0.1S, 2000 COMP 1 V = 10.1 HD38268 R136 DEC = -69D 06' 02.8" +/- 1" 2 F-CONT(1500) = 6.2 E-13 Comments: POSITION FROM PC IMAGE MEASURED BY ARCHIE BETWEEN A1 AND A2 UV CONTINUUM FLUXES ESTIMATED FROM IUE OBSERVATIONS OF TOTAL FLUX AND RATIOS OF COMPONENT BRIGHTNESSES IN VISIBLE LIGHT. GS PLATE ID = 06B0 ------------------------------------------------------------------------------------------------------------------------------------ 2 R136A2 RESOLVED COMPONENT R = 0.1", 2000 COMP 1 F-CONT(1500) = 4.8 E-13 PA = 66D, FROM 8 ------------------------------------------------------------------------------------------------------------------------------------ 3 R136B RESOLVED COMPONENT R = 2.2", 2000 COMP 1 F-CONT(1500) = 3.3 E-13 PA = 115D, FROM 8 ------------------------------------------------------------------------------------------------------------------------------------ 4 R136C RESOLVED COMPONENT R = 3.4", 2000 COMP 1 F-CONT(1500) = 3.3 E-13 PA = 126D, FROM 8 ------------------------------------------------------------------------------------------------------------------------------------ 5 R136A3 RESOLVED COMPONENT R = 0.5", 2000 COMP 1 F-CONT(1500) = 4.8 E-13 PA = 223D, FROM 8 ------------------------------------------------------------------------------------------------------------------------------------ 6 R136A4 RESOLVED COMPONENT R = 0.4", 2000 COMP 1 F-CONT(1500) = 1.0 E-13 PA = 323D, FROM 8 ------------------------------------------------------------------------------------------------------------------------------------ 7 SKY WINGS OF PSF R = 0.5", 2000 COMP 1 F-CONT(1500) = 1.0E-13 PA = 270D, FROM 8 ------------------------------------------------------------------------------------------------------------------------------------ 8 R136-OFFSET REFERENCE POINT FOR RA = 5H 38M 42.50S +/- 0.1S, 2000 COMP 1 V = 10.1 HD38268 COMPONENTS DEC = -69D 06' 02.8" +/- 1" BRIGHTEST COMPONENT OF R136 Comments: COORDS OF REF POINT MEASURED WITH GASP BY ARCHIE WARNOCK. OFFSETS TO COMPONENTS FROM WEIGELT AND BAIER SPECKLE OBS UPDATE AFTER EARLY ACQ IMAGES ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3942c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 10 R136A1 HRS ACQ 2.0 MIRROR-N2 SEARCH-SIZE=3 1 477S 10 1 2 INT ACQ FOR 20-160 CYCLE 2 /10-160 ------------------------------------------------------------------------------------------------------------------------------------ 20 R136A1 HRS IMAGE 2.0 MIRROR-N2 NX=22 1 96.8S 10 1 2 NY=22 DELTA-X=2 DELTA-Y=2 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 30 R136A1 HRS IMAGE 0.25 MIRROR-N2 NX=22 1 96.8S 10 1 2 SEQ 30-50 NO GAP NY=22 DELTA-X=1 DELTA-Y=1 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 40 WAVE HRS ACCUM SC1 G160M 1250 STEP-PATT=2 1 40.0S 25 2 CALIB FOR 50 ------------------------------------------------------------------------------------------------------------------------------------ 50 R136A1 HRS ACCUM 0.25 G160M 1250 STEP-PATT=2 8 300.8S 25 2 2 ------------------------------------------------------------------------------------------------------------------------------------ 60 R136A1 HRS IMAGE 0.25 MIRROR-N2 NX=22 1 96.8S 10 1 2 SEQ 60-80 NO GAP NY=22 DELTA-X=1 DELTA-Y=1 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 70 WAVE HRS ACCUM SC1 G160M 1380 STEP-PATT=2 1 40.0S 25 2 CALIB FOR 80 ------------------------------------------------------------------------------------------------------------------------------------ 80 R136A1 HRS ACCUM 0.25 G160M 1380 STEP-PATT=2 8 300.8S 25 2 2 ------------------------------------------------------------------------------------------------------------------------------------ 90 R136A1 HRS IMAGE 0.25 MIRROR-N2 NX=22 1 96.8S 10 1 2 SEQ 90-110 NO GAP NY=22 DELTA-X=1 DELTA-Y=1 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 100 WAVE HRS ACCUM SC1 G160M 1542 STEP-PATT=2 1 40.0S 25 2 CALIB FOR 110 ------------------------------------------------------------------------------------------------------------------------------------ 110 R136A1 HRS ACCUM 0.25 G160M 1542 STEP-PATT=2 8 300.8S 25 2 2 ------------------------------------------------------------------------------------------------------------------------------------ 140 R136A1 HRS ACCUM 0.25 G160M 1250 STEP-PATT=2 30 300.8S 20 2 2 COND IF TAC OK ------------------------------------------------------------------------------------------------------------------------------------ 150 R136A1 HRS ACCUM 0.25 G160M 1380 STEP-PATT=2 20 300.8S 20 2 2 COND IF TAC OK ------------------------------------------------------------------------------------------------------------------------------------ 160 R136A1 HRS ACCUM 0.25 G160M 1542 STEP-PATT=2 20 300.8S 20 2 2 COND IF TAC OK ------------------------------------------------------------------------------------------------------------------------------------ 300 R136A3 HRS ACQ 2.0 MIRROR-N2 SEARCH-SIZE=3 1 477S 10 1 2 INT ACQ FOR 310- 410 CYCLE 2 / 300-410 COND IF TAC OK ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3942c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 310 R136A3 HRS IMAGE 2.0 MIRROR-N2 NX=22 1 96.8S 10 1 2 COND IF TAC OK NY=22 DELTA-X=2 DELTA-Y=2 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 320 R136A3 HRS IMAGE 2.0 MIRROR-N1 NX=22 1 484S 10 1 2 COND IF TAC OK NY=22 DELTA-X=2 DELTA-Y=2 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 330 R136A3 HRS IMAGE 0.25 MIRROR-N1 NX=22 1 96.8S 10 1 2 COND IF TAC OK NY=22 DELTA-X=1 DELTA-Y=1 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 340 R136A3 HRS ACCUM 0.25 G140L 1362.5 STEP-PATT=2 2 1203.2S 20 1 2 COND IF TAC OK FP-SPLIT=STD ------------------------------------------------------------------------------------------------------------------------------------ 350 R136A3 HRS ACCUM 0.25 G140L 1642.5 STEP-PATT=2 2 1203.2S 15 1 2 COND IF TAC OK FP-SPLIT=STD ------------------------------------------------------------------------------------------------------------------------------------ 360 R136A3 HRS IMAGE 0.25 MIRROR-N1 NX=22 1 96.8S 10 1 2 COND IF TAC OK NY=22 DELTA-X=1 DELTA-Y=1 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 370 R136A3 HRS IMAGE 2.0 MIRROR-N1 NX=22 1 96.8S 10 1 2 COND IF TAC OK NY=22 DELTA-X=2 DELTA-Y=2 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 380 SKY HRS IMAGE 2.0 MIRROR-N1 NX=22 1 96.8S 10 1 2 COND IF TAC OK NY=22 DELTA-X=2 DELTA-Y=2 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 390 SKY HRS IMAGE 0.25 MIRROR-N1 NX=22 1 96.8S 10 1 2 COND IF TAC OK NY=22 DELTA-X=1 DELTA-Y=1 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 400 SKY HRS ACCUM 0.25 G140L 1362.5 STEP-PATT=2 1 1203.2S 15 1 2 COND IF TAC OK FP-SPLIT=STD ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3942c [ 7] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 410 SKY HRS ACCUM 0.25 G140L 1642.5 STEP-PATT=2 1 1203.2S 15 1 2 COND IF TAC OK FP-SPLIT=STD ------------------------------------------------------------------------------------------------------------------------------------ 500 R136A1 HRS ACQ 2.0 MIRROR-N1 SEARCH-SIZE=3 1 477S 10 1 2 INT ACQ FOR 510- 830 CYCLE 5 / 500-830 ------------------------------------------------------------------------------------------------------------------------------------ 510 R136A1 HRS IMAGE 2.0 MIRROR-N1 NX=22 1 96.8S 10 1 2 NY=22 DELTA-X=2 DELTA-Y=2 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 520 R136A1 HRS IMAGE 0.25 MIRROR-N1 NX=22 1 96.8S 10 1 2 NY=22 DELTA-X=1 DELTA-Y=1 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 530 R136A1 HRS ACCUM 0.25 G140L 1362.5 STEP-PATT=2 1 320.0S 50 2 2 ------------------------------------------------------------------------------------------------------------------------------------ 540 R136A1 HRS ACCUM 0.25 G140L 1642.5 STEP-PATT=2 1 320.0S 50 2 2 ------------------------------------------------------------------------------------------------------------------------------------ 550 R136A1 HRS IMAGE 2.0 MIRROR-N1 NX=22 1 96.8S 10 1 2 NY=22 DELTA-X=2 DELTA-Y=2 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 600 R136B HRS ACQ/ 2.0 MIRROR-N1 1 46S 10 1 2 ONBOARD ACQ FOR PEAKUP 610-640 SEQ 600-640 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 610 R136B HRS IMAGE 2.0 MIRROR-N1 NX=22 1 96.8S 10 1 2 NY=22 DELTA-X=2 DELTA-Y=2 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 620 R136B HRS IMAGE 0.25 MIRROR-N1 NX=22 1 96.8S 10 1 2 NY=22 DELTA-X=1 DELTA-Y=1 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 630 R136B HRS ACCUM 0.25 G140L 1362.5 STEP-PATT=2 1 320.0S 50 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 640 R136B HRS ACCUM 0.25 G140L 1642.5 STEP-PATT=2 1 320.0S 50 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 700 R136C HRS ACQ/ 2.0 MIRROR-N1 1 46S 10 1 2 ONBOARD ACQ FOR PEAKUP 710-740 SEQ 700-740 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3942c [ 8] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 710 R136C HRS IMAGE 2.0 MIRROR-N1 NX=22 1 96.8S 10 1 2 NY=22 DELTA-X=2 DELTA-Y=2 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 720 R136C HRS IMAGE 0.25 MIRROR-N1 NX=22 1 96.8S 10 1 2 NY=22 DELTA-X=1 DELTA-Y=1 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 730 R136C HRS ACCUM 0.25 G140L 1362.5 STEP-PATT=2 1 320.0S 50 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 740 R136C HRS ACCUM 0.25 G140L 1642.5 STEP-PATT=2 1 320.0S 50 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 800 R136A4 HRS IMAGE 2.0 MIRROR-N1 NX=22 1 96.8S 10 1 2 NY=22 DELTA-X=2 DELTA-Y=2 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 810 R136A4 HRS IMAGE 0.25 MIRROR-N1 NX=22 1 96.8S 10 1 2 NY=22 DELTA-X=1 DELTA-Y=1 PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ 820 R136A4 HRS ACCUM 0.25 G140L 1362.5 STEP-PATT=2 1 320.0S 50 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 830 R136A4 HRS ACCUM 0.25 G140L 1642.5 STEP-PATT=2 1 320.0S 50 1 2 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 3942c [ 9] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations HRS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ IMAGE ACCUM ACQ/PEAKUP ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SEARCH-SIZE=3 NX=22 NY=22 DELTA-X=2 DELTA-Y=2 PRECISION=HIGH DELTA-X=1 DELTA-Y=1 STEP-PATT=2 FP-SPLIT=STD ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GTO/HRS ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 16.04 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category STELLAR ASTROPHYSICS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements INT ACQ FOR 20-160; CYCLE 2 /10-160; SEQ 30-50 NO GAP; CALIB FOR 50; SEQ 60-80 NO GAP; CALIB FOR 80; SEQ 90-110 NO GAP; CALIB FOR 110; COND IF TAC OK; INT ACQ FOR 310-410; CYCLE 2 / 300-410; INT ACQ FOR 510-830; CYCLE 5 / 500-830; ONBOARD ACQ FOR 610-640; SEQ 600-640 NO GAP; ONBOARD ACQ FOR 710-740; SEQ 700-740 NO GAP; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR-N2 G160M MIRROR-N1 G140L ------------------------------------------------------------------------------------------------------------------------------------ Target Names R136A1 HD38268 R136A2 R136B R136C R136A3 R136A4 SKY R136-OFFSET ------------------------------------------------------------------------------------------------------------------------------------