Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 4800c Report Date: 09-May-96:19:57 Version: ********** Check-in Date: ********** 1.Proposal Title: THE STELLAR CONTENT OF WOLF-RAYET GALAXIES (FOC IMAGES) ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID STELLAR POPULATIONS GO 3810 Sub Category YOUNG FIELD STARS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Dr. Peter S. Conti JILA USA (303) 492-8497 ASTRONOMER ------------------------------------------------------------------------------------ 7. Abstract We propose to observe a comprehensive sample of Wolf-Rayet (W-R) galaxies --- starburst galaxies in which broad 4686 He II emission of stellar origin has been detected. These galaxies generally contain far more W-R stars than the Milky Way, M31, and other normal galaxies. The ultraviolet FOC images and FOS spectra will be combined with optical and infrared data as part of a large effort to perform a broad, systematic analysis of the properties of W-R galaxies. The UV data obtained with HST will provide crucial constraints on the hot star (O and W-R) populations, and will lead to a better understanding of the physical conditions, initial mass functions, and starburst parameters of these galaxies. The overall continuum will be analyzed within the framework of evolutionary and spectral synthesis models that we are developing. Quantitative spectroscopy of UV resonance lines will allow us to study the hot star populations in detail, and to directly measure the number of OB stars within these galaxies. Our main goal is to determine which physical properties of W-R galaxies (e.g., IMF slope, chemical composition, age, strength and duration of the starburst) have led to the production of large numbers of W-R stars. The results of this study will have important implications for our understanding of W-R galaxies, and also of starburst and emission-line galaxies in general. ------------------------------------------------------------------------------------ 8. Scientific Key Words: LBV'S, WOLF-RAYET STARS, STARBURSTS ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 2.22 par: 0 10. Num targs pri: 18 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: FOS FOC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 4800c PI: Dr. Peter S. Conti Proposal Title: THE STELLAR CONTENT OF WOLF-RAYET GALAXIES (FOC IMAGES) ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Pi Peter S. Conti UNIVERSITY OF COLORADO USA Alexei V. Filippenko UNIVERSITY OF CALIFORNIA, USA BERKELEY Claus Leitherer SPACE TELESCOPE SCIENCE USA X INSTITUTE Carmelle Robert SPACE TELESCOPE SCIENCE USA INSTITUTE Wallace L. Sargent CALIFORNIA INSTITUTE OF USA TECHNOLOGY William D. Vacca UNIVERSITY OF CALIFORNIA, USA BERKELEY ------------------------------------------------------------------------------------ 3. Description of proposed observations. We would like to obtain FOC images of ALL of our W-R galaxies at 1600A. We anticipate that many if not most of our systems will contain multiple knots of hot stars which will readily stand out against the overall galaxy background in these UV wavelengths. Ground-based observations suggest typical knot-sizes of approximately 3". The FOC/48 + F140W set-up meets the following requirements: (i) large FOV; (ii) image scale small enough to maximize count-rate; (iii) sampling large enough to study spatial morphology; (iv) no significant red leak. The FOC data serve a threefold purpose: (i) UV morphology; (ii) flux measurement for FOS; (iii) check for potential difficulties in the FOS target acquisition. We would also like to obtain FOS spectra of the brightest knots of some W-R galaxies. The objects will be selected on the basis of the FOC data; There may be more than one knot per galaxy. The scientific goal can be best achieved with the FOS and gratings G130H and G190H. We intend to use the blue-side detector for both gratings. The positions and the exposure times of the candidates for FOS spectroscopy will be updated in order to ensure successful target acquisition. A peak-up technique is used for the TA. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. There are no UV images of W-R galaxies yet published. FOC is the only UV imaging device presently available. It is the combination of the superior resolution (IUE: 6A; FOS: 3A for a knot of 2-3") and vastly better S/N (IUE: typically 10; FOS: 35 for our proposed observations) of HST data which provide a dramatic improvement. STRONG lines (like C IV) can be modeled quantitatively with HST, and WEAKER lines (like N IV 1718, which is an important signature of hot EVOLVED stars) can only be detected with HST, in contrast to IUE. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. The FOC exposures should be scheduled as early as possible in Cycle 2 since the results (morphology; flux levels) will be used to select the targets for spectroscopy with the FOS. ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. No special calibrations are requested. According to the FOC instrument scientist, PSF's will be provided by STScI. Page 3 ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. The general management of the observations (including the ground observations) and the data reduction and interpretation will be coordinated by Peter Conti. Reduction of the FOC images with deconvolution techniques will be done under P. Conti's supervision at JILA utilizing a graduate student RA. FOS deconvolution will be carried out by Claus Leitherer. P. Conti is also in charge of the pre- analysis of the HST observations (line identification, interstellar extinction...). Other observations from the ground are to be acquired, reduced and analysed by Alex Filippenko, Wal Sargent and Bill Vacca. The population synthesis models will be done at STScI by Carmelle Robert and Claus Leitherer. All co-Is will be intimately involved with data analysis and interpretation. ------------------------------------------------------------------------------------ 8. Additional comments or special requests. The HST observations are supported by ground-based observations. There is no need for simultaneous observations. ------------------------------------------------------------------------------------ 11. Address Information Name: PETER S CONTI Category: PI Institution: JILA/UNIV. OF COLORADO Address: CAMPUS BOX 440 City: BOULDER State: CO Zip Code: 80309 Country: USA Telephone: (303) 492-8497 Telex (or e-mail): 755842 JILA ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 4800c [ 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 NGC1614 E,318,928 RA=4H 33M 59.7S +/- 0.05S, J2000 EXT 1 V=14.0 +/- 1.0 DEC=-8D 34' 46.3" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 2 MRK1087 E,318,928 RA=4H 49M 44.42S +/- 0.05S, J2000 EXT 1 V=15.0 +/- 1.0 DEC=+3D 20' 02.6" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC1741 E,318,928 RA=5H 01M 37.8S +/- 0.05S, J2000 EXT 1 V=14.0 +/- 1.0 DEC=-4D 15' 31.5" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 4 MRK1094 E,318,928 RA=5H 10M 48.06S +/- 0.05S, J2000 EXT 1 V=14.0 +/- 1.0 DEC=-2D 40' 54.1" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 5 IIZW40 E,318,928 RA=5H 55M 42.6S +/- 0.05S, J2000 EXT 1 V=16.0 +/- 1.0 DEC=+3D 23' 30.5" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 6 MRK8 E,318,928 RA=7H 29M 26.3S +/- 0.05S, J2000 EXT 1 V=14.0 +/- 1.0 DEC=+72D 07' 44.6" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 7 HE2-10 E,318,928 RA=8H 36M 15.0S +/- 0.05S, J2000 EXT 1 V=13.0 +/- 1.0 DEC=-26D 24' 36.0" +/- .5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 8 MRK1236 E,318,928 RA=9H 49M 54.12S +/- 0.05S, J2000 EXT 1 V=14.0 +/- 1.0 DEC=+00D 36' 58.2" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC3049 E,318,928 RA=9H 54M 49.5S +/- 0.05S, J2000 EXT 1 V=14.0 +/- 1.0 DEC=+9D 16' 16.0" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC3125 E,318,928 RA=10H 06M 33.4S +/- 0.05S, J2000 EXT 1 V=15.0 +/- 1.0 DEC=-29D 56' 09.5" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 11 MRK33 E,318,928 RA=10H 32M 31.76S +/- 0.05S, J2000 EXT 1 V=13.0 +/- 1.0 DEC=+54D 24' 03.00" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 12 MRK36 E,318,928 RA=11H 04M 58.48S +/- 0.05S, J2000 EXT 1 V=16.0 +/- 1.0 DEC=+29D 08' 17.0" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 13 POX4 E,318,928 RA=11H 51M 11.4S +/- 0.05S, J2000 EXT 1 V=16.0 +/- 1.0 DEC=-20D 35' 58.2" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 4800c [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 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| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 14 NGC4214 E,318,928 RA=12H 15M 39.4S +/- 0.05S, J2000 EXT 1 V=13.0 +/- 1.0 DEC=+36D 19' 36.4" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 15 NGC4861 E,318,928 RA=12H 59M 00.4S +/- 0.05S, J2000 EXT 1 V=13.0 +/- 1.0 DEC=+34D 50' 42.9" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 16 TOL35 E,318,928 RA=13H 27M 06.66S +/- 0.05S, J2000 EXT 1 V=15.0 +/- 1.0 DEC=-27D 57' 20.9" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 17 TOL89 E,318,928 RA=14H 01M 20.0S +/- 0.05S, J2000 EXT 1 V=16.0 +/- 1.0 DEC=-33D 04' 10.0" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ 18 NGC6764 E,318,928 RA=19H 08M 016.48S +/- J2000 EXT 1 V=13.0 +/- 1.0 0.05S, DEC=+50D 56' 00.0" +/-.5" Comments: ULTRAVIOLET FLUX UNCERTAIN ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 4800c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC1614 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 2 MRK1087 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC1741 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 4 MRK1094 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 5 IIZW40 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 6 MRK8 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 7 HE2-10 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 8 MRK1236 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 4800c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC3049 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 650S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC3125 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 500S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 11 MRK33 FOC/96 IMAGE 512X102 F220W, PIXEL=50X25 1 1200S 5 1 1 CYCLE 2 4 F2ND Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 12 MRK36 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 600S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 13 POX4 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 14 NGC4214 FOC/96 IMAGE 512X102 F220W, PIXEL=50X25 1 1200S 5 1 1 CYCLE 2 4 F2ND Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 15 NGC4861 FOC/96 IMAGE 512X102 F220W, PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 F2ND Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 16 TOL35 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 4800c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 17 TOL89 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ 18 NGC6764 FOC/96 IMAGE 512X102 F220W PIXEL=50X25 1 1000S 5 1 1 CYCLE 2 4 Comments: USE COARSE TRACK IF NO F-L GUIDE STARS AVAILABLE; SCHEDULE AS EARLY AS POSSIBLE; ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 4800c [ 9] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOC/96 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters PIXEL=50X25 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 2.22 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category STELLAR POPULATIONS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category YOUNG FIELD STARS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 2; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F220W F220W,F2ND ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC1614 MRK1087 NGC1741 MRK1094 IIZW40 MRK8 HE2-10 MRK1236 NGC3049 NGC3125 MRK33 MRK36 POX4 NGC4214 NGC4861 TOL35 TOL89 NGC6764 ------------------------------------------------------------------------------------------------------------------------------------