7702( 7) - 04/03/98 10:34 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 7702 Version: 7 Check-in Date: 03-Apr-1998 10:33:18 1.Proposal Title: Observations of a possible optical counterpart of GRB970508 ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO/DD 7 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: ELENA PIAN ITESRE-CNR CoI: M. Feroci IAS-CNR N CoI: L. Nicastro ITESRE-CNR N CoI: D. Dal Fiume ITESRE-CNR N CoI: H. Pedersen CUO N CoI: C. Alcock MSSSO N CoI: A. Castro-Tirado LAEFF N CoI: D. Frail VLA N CoI: A. Guarnieri Bologna Observatory N CoI: K. Hurley UC-Berkeley N CoI: S. Thorsett Princeton N CoI: L. Metcalfe ESA-VILSPA N CoI: J. Heise Utrecht SRON N CoI: P. Caraveo IFCTR-CNR N CoI: Andy Fruchter STScI Y CoI: Bill Sparks STScI N CoI: Ray Lucas STScI N CoI: BEPPO-SAX TEAM Bologna N CoI: F. Frontera ITESRE-CNR N CoI: L. Piro IAS-CNR N CoI: M. Tavani Columbia University N CoI: T. Gull NASA/GSFC N CoI: E. Costa IAS-CNR N CoI: E. Palazzi ITESRE-CNR N ------------------------------------------------------------------------------------ 5. Abstract To make a very deep high-resolution image with STIS CCDs covering the location of the optical transient and also using H-band imaging with NICMOS Camera 2. The immediate goals of our observation are: (i) To constrain the magnitude of the variable object to the deepest possible flux levels that can be reached in a reasonable exposure time. (ii) To obtain the best morphological information possible. ------------------------------------------------------------------------------------ 7702( 7) - 04/03/98 10:34 - [ 2] Observations Description ------------------------ Observations will be taken with STIS CCDs for 2 orbits ( no filter ) and for 1 orbit with NICMOS in H-band. Real Time Justification ----------------------- This candidate gamma ray burster is declining fast in brightness and the observations need to be done as soon as possible. Calibration Justification ------------------------- None Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 7702( 7) - 04/03/98 10:34 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB970508 STAR,GAMMA RAY BURSTER RA=06H 53M 49.43S +/- J2000 V = 27+/-2 0.1S,DEC=79D 16' 19.6" +/- 0.2",PLATE-ID=0708 7702( 7) - 04/03/98 10:34 - [ 4] Visit: 01 Visit Priority: Visit Requirements: SCHED 100% GROUP 1-2 WITHIN 12 H On Hold Comments: Additional Comments: Please do Visits 01 and 02 back-to-back if possible, else please do within no more than 12 hours. Either visit can be done first, whichever is easier. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 GRB970508 STIS/C ACCUM 50CCD MIRROR CR-SPLIT=NO 1 1250 S MAX DUR MIN DUR CD ------------------------------------------------------------------------------------------------------------------------------------ 20 GRB970508 STIS/C ACCUM 50CCD MIRROR CR-SPLIT=NO 1 1250 S POS TARG 0.0,0.125 MAX CD DUR MIN DUR ------------------------------------------------------------------------------------------------------------------------------------ 30 GRB970508 STIS/C ACCUM 50CCD MIRROR CR-SPLIT=NO 1 1250 S POS TARG 0.125,0.0 MAX CD DUR MIN DUR ------------------------------------------------------------------------------------------------------------------------------------ 40 GRB970508 STIS/C ACCUM 50CCD MIRROR CR-SPLIT=NO 1 1250 S POS TARG 0.175,0.175 MAX CD DUR MIN DUR ------------------------------------------------------------------------------------------------------------------------------------ 7702( 7) - 04/03/98 10:34 - [ 5] Visit: 02 Visit Priority: Visit Requirements: SCHED 100% On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 50 GRB970508 NIC2 MULTIAC NIC2 F160W SAMP-SEQ=STEP64,NSAMP=9 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 60 GRB970508 NIC2 MULTIAC NIC2 F160W SAMP-SEQ=MIF512,NSAMP=25, 1 DEF CUM NUM-POS=4,PATTERN=SPIRAL-DITH, DITH-SIZE=0.8 ------------------------------------------------------------------------------------------------------------------------------------ 7702( 7) - 04/03/98 10:34 - [ 6] Summary Form for Proposal 7702 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD NIC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO NSAMP=9 DITH-SIZE=0.8 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO/DD ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SCHED 100% GROUP 1-2 WITHIN 12 H MAX DUR MIN DUR POS TARG 0.0,0.125 MAX DUR MIN DUR POS TARG 0.125,0.0 MAX DUR MIN DUR POS TARG 0.175,0.175 MAX DUR MIN DUR SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR F160W ------------------------------------------------------------------------------------------------------------------------------------ Target Names GRB970508 ------------------------------------------------------------------------------------------------------------------------------------