Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5691 Report Date: 18-Jul-95:17:51 Version: ********** Check-in Date: ********** 1.Proposal Title: MASSIVE STARS IN STARBURST GALAXIES-FOS EXPOSURES(PART2) CYCLE 4 CARRYOVER ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID STELLAR POPULATIONS GO/CAR 4250 Sub Category MASSIVE STARS/BURSTS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Timothy M. Heckman STSCI USA 301-338-7369 ------------------------------------------------------------------------------------ 7. Abstract Starburst galaxies are ideal laboratories to study both the physics of massive stars and processes important in galaxy formation and evolution. Observations of these galaxies at ultraviolet wavelengths are crucial to our understanding of the starburst phenomenon, because only in this spectral regime can we directly observe the spectroscopic signatures of the hot, massive stars that power the emission at other wavebands. Indeed, we believe that the investigation of the UV properties of starburst galaxies is one of the most valuable tasks to be undertaken with HST. We have identified what we believe to be an optimal sample of the UV-brightest starburst galaxies in the local universe. These span as broad a range as possible in metal abundance and starburst luminosity. We describe an HST program designed to both give us a broad overview of the UV properties and stellar content of starbursts and to answer some important specific questions about starbursts. We anticipate that observations like these will be the prelude to a decade of fundamental and exciting HST research on massive stars and starburst galaxies. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 1.72 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: HRS ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5691 PI: Timothy M. Heckman Proposal Title: MASSIVE STARS IN STARBURST GALAXIES-FOS EXPOSURES(PART2) CYCLE 4 CARRYOVER ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Pi Timothy M. Heckman STSCI USA Don Garnett STSCI USA Anne Kinney STSCI USA Claus Leitherer STSCI USA X Carmelle Robert STSCI USA ------------------------------------------------------------------------------------ 2. Scientific Justification. ------------------------------------------------------------------------------------ 3. Description of proposed observations. We wish to obtain two GHRS spectra of the target NGC1705 using the G140L grating and the small science aperture. The first spectrum should be centered on 1320A and the second on 1600A so that we cover the spectral region from about 1180 to 1740 A. Given the relative throughput of the GHRS in these two spectral windows, we require exposure times of 1200s and 2400s respectively. To insure an accurate wavelength scale we will precede each exposure with a wavelength calibration. We will employ a two-stage ACQ/PEAK-UP using first the 2.0 aperture and then the 0.25 aperture. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. The space-UV is the spectral region in which the hot, massive stars that power starburst galaxies can be best directly observed. IUE has too little collecting area and too poor spectral resolution to discriminate between an interstellar, photospheric, or stellar wind origin for the UV absorption lines seen in starbursts. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. None ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. We have no special requirements. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. The radial velocity, equivalent width, width, and flux will be measured for all stellar and interstellar absorption lines and all emission lines in the GHRS spectra. The broad profiles of the stellar wind lines will be compared to model profiles produced by Leitherer and Robert. Data analysis will be conducted at STScI and JHU. ------------------------------------------------------------------------------------ 8. Additional comments or special requests. None. ------------------------------------------------------------------------------------ 9. Description of previous HST work. Program 2644 "The Environments of Starburst Galaxies" C.A. Norman (PI), J.C. Blades, L. Danly, and T. Heckman (coI's). No observations for this program have been obtained yet. Page 3 ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). The data reduction and analysis will be undertaken at STScI and at JHU. The extensive computer software, and HRS, and FOC expertise available at these two institutions will be utilized (see above). We will use the SDA ('Science Data Analyst') pool at STScI to assist us in the data reduction and analysis. STScI will pay 25 percent of the salary of this person. In addition, at least one JHU graduate student (supported by other contract funds) will be involved in the portion of the project dealing with interstellar absorption lines. ------------------------------------------------------------------------------------ 11. Address Information Name: TIMOTHY M. HECKMAN Category: PI Institution: STSCI Address: 3700 SAN MARTIN DRIVE City: BALTIMORE State: MD Zip Code: 21218 Country: USA Telephone: 301-338-7369 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5691 [ 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 NGC1705 E,318,928 RA=04H 54M 13.4S +/- 0.1S, 2000 EXT DEC=-53D 21' 38.9" +/-1.0" ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5691 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 100 NGC1705 HRS ACQ 2.0 MIRROR-N1 SEARCH-SIZE=5 1 150S 1 CYCLE 4 BRIGHT=RETURN ONBOARD ACQ FOR 101 Comments: STEP-TIME=6S; ------------------------------------------------------------------------------------------------------------------------------------ 101 NGC1705 HRS ACQ/ 0.25 MIRROR-N1 SEARCH-SIZE=5 1 125S 1 CYCLE 4 PEAKUP ONBOARD ACQ FOR 102 Comments: STEP-TIME=5S; ------------------------------------------------------------------------------------------------------------------------------------ 102 WAVE HRS ACCUM SC2 G140L 1320 1 60S 1 CYCLE 4 CALIB FOR 103 SEQUENCE 102-105 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 103 NGC1705 HRS ACCUM 0.25 G140L 1320 1 1200S 1 CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ 104 WAVE HRS ACCUM SC2 G140L 1600 1 60S 1 CYCLE 4 CALIB FOR 105 ------------------------------------------------------------------------------------------------------------------------------------ 105 NGC1705 HRS ACCUM 0.25 G140L 1600 1 2400S 1 CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5691 [ 6] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations HRS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACQ/PEAKUP ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SEARCH-SIZE=5 BRIGHT=RETURN ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO/CAR ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 1.72 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category STELLAR POPULATIONS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category MASSIVE STARS/BURSTS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4; ONBOARD ACQ FOR 101; ONBOARD ACQ FOR 102 CALIB FOR 103; SEQUENCE 102-105 NO GAP; CALIB FOR 105; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR-N1 G140L ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC1705 ------------------------------------------------------------------------------------------------------------------------------------