Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 3335c Report Date: 09-May-96:18:28 Version: ********** Check-in Date: ********** 1.Proposal Title: BULGE STELLAR POPULATIONS IN SO GALAXIES - CYCLE 3 ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID GALAXIES & CLUSTERS AUG/FOC 2 Long Term yrs 3487 Sub Category NEARBY GALAXIES ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Dr. Jean M Deharveng LABORATOIRE ASTRONOMIE SPATI FRANCE 91 05 59 17 ------------------------------------------------------------------------------------ 7. Abstract It is proposed to study the origin of the UV flux in elliptical-type population and to determine the respective contribution from young stars and from hot evolved stars. Two SO galaxies NGC 5102 and NGC 3115, at reasonable distance and with very different gas contents, have been selected. Observations through several filters (especially a far UV filter) will allow to resolve and study the massive stars, if they exist. The UV surface brightness of the unresolved background will be measured and will set constraints on the characteristics of hot evolved stars. ------------------------------------------------------------------------------------ 8. Scientific Key Words: EARLY-TYPE GALAXIES, STAR FORMATION ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 4.39 par: 0 10. Num targs pri: 4 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: FOC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 3335c PI: Dr. Jean M Deharveng Proposal Title: BULGE STELLAR POPULATIONS IN SO GALAXIES - CYCLE 3 ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Brigitte Rocca-Volmerange INSTITUTE OF ASTROPHYSICS, PARIS FRANCE X J. M. Deharveng MARSEILLE OBSERVATORY FRANCE X ------------------------------------------------------------------------------------ 3. Description of proposed observations. following cycle2 observations it is proposed to observe NGC3115 with the F342W filter and NGC5102 with the F220W filter in order to get color information on the massive stars, if any. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. The high spatial resolution of the FOC will provide the possibility to resolve the young and massive stars, if they exist, in two examples of relatively nearby elliptical-type population. This capability is further improved by the good response of the FOC in the ultra-violet. At these wavelengths, the contrast of young and hot stars would be enhanced against the contribution of the main- sequence and giant-branch components of the old stellar population. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. we plan to use IRAF/STSDAS on workstations ------------------------------------------------------------------------------------ 9. Description of previous HST work. GTO program ID 1246 and cycle 2 observations on this program ------------------------------------------------------------------------------------ 11. Address Information Name: J. M. DEHARVENG Category: PI Institution: LABORATOIRE ASTRONOMIE SPATIALE Address: C.N.R.S. TRAVERSE DU SIPHON LE TROIS LUCS City: BP8-13376 MARSEILLE CEDEX12 State: Zip Code: Country: FRANCE Telephone: (33) 91 05 59 17 Telex (or e-mail): 420584F ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 3335c [ 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 NGC5102 E,302 RA=13H 21M 57.5S +/- 4", 2000 V=454 EXT 1 SURF(V)=17.5 DEC=-36D 37' 49" +/- 4" 2 V=25.2, TYPE=B1V ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC3115 E,302 RA=10H 05M 14.2S +/- 4", 2000 V=698 EXT 1 V=25.7, TYPE=B1V DEC=-7D 43' 5" +/- 4" ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3335c [ 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 NGC5102 FOC/48 IMAGE 512X512 F220W 1 2280S 6 2 1 CYCLE 3 / 1-2 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC3115 FOC/48 IMAGE 512X512 F342W 1 1400S 6 1 2 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 3335c [ 5] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOC/48 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Proposal for AUG/FOC ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 4.39 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category GALAXIES & CLUSTERS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category NEARBY GALAXIES ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 3 / 1-2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F220W F342W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC5102 NGC3115 ------------------------------------------------------------------------------------------------------------------------------------