8912( 2) - 06/01/01 15:10 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 8912 Version: 2 Check-in Date: 01-Jun-2001 15:09:42 1.Proposal Title: CCD Full-Field Sensitivity Monitor C10 ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle CAL/STIS 10 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Bahram Mobasher Space Telescope Science Institute CoI: James Davies Space Telescope Science Institute N ------------------------------------------------------------------------------------ 5. Abstract Measure a photometric standard star field in Omega Cen in 50CCD mode every few months to monitor CCD sensitivity over the whole field of view. Keep the spacecraft orientation within a suitable range (+/- 5 degrees) to keep the same stars in the same part of the CCD for every measurement. The second observation is performed at an orientation rotated by 180 degrees with respect to the other observations to study the effect of CTE (to first order). This test will give a direct transformation of the 50CCD magnitudes to the Johnson-Cousins system for red sources. These transformations should be accurate to 1%. The stability of these transformations will be measured to the sub-percent level. These observations also provide a check of the astrometric and PSF stability of the instrument over its full field of view. ------------------------------------------------------------------------------------ Observations Description ------------------------ Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- Keep the spacecraft orientation within a suitable range (+/- 5 degrees) to keep the same stars in the same part of the CCD for every measurement. ------------------------------------------------------------------------------------ 8912( 2) - 06/01/01 15:10 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC5139 CALIBRATION, RA=13H 25M 37.04S +/- 0.100S, J2000 V = 14.5 PHOTOMETRIC DEC=-47D 35' 38.3" +/- 1.00" Coordinate Source: HST_IMAGE Comments: NGC5139 IS THE PHOTOMETRIC STANDARD FIELD, KNOWN FROM WFPC2 2 NGC5139-NEW CALIBRATION, RA=13H 25M 37.04S +/- 0.100S, J2000 V = 14.5 PHOTOMETRIC DEC=-47D 35' 38.3" +/- 1.00", PLATE-ID=ZZZR Coordinate Source: HST_IMAGE Comments: NGC5139 IS THE PHOTOMETRIC STANDARD FIELD, KNOWN FROM WFPC2 8912( 2) - 06/01/01 15:10 - [ 3] Visit: 01 Visit Priority: Visit Requirements: ORIENT 130D TO 154D BETWEEN 01-Sep-2001 AND 20-Sep-2001 SCHED 100% On Hold Comments: Additional Comments: 50CCD image of NGC5139. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC5139 STIS/C ACCUM 50CCD MIRROR GAIN=4,CR-SPLIT=5 1 10 S MAX DUR 100% SEQ 10-20 CD NON-INT Comments: To be taken every 6 months at 180d rotations. ------------------------------------------------------------------------------------------------------------------------------------ 20 NGC5139 STIS/C ACCUM 50CCD MIRROR GAIN=4,CR-SPLIT=2 1 60 S MAX DUR 100% SEQ 10-20 CD NON-INT Comments: To be taken every 6 months at 180d rotations. ------------------------------------------------------------------------------------------------------------------------------------ 8912( 2) - 06/01/01 15:10 - [ 4] Visit: 02 Visit Priority: Visit Requirements: ORIENT 310D TO 359D 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 ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC5139-NEW STIS/C ACCUM 50CCD MIRROR GAIN=4,CR-SPLIT=5 1 10 S MAX DUR 100% SEQ 10-20 CD NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 20 NGC5139-NEW STIS/C ACCUM 50CCD MIRROR GAIN=4,CR-SPLIT=2 1 60 S MAX DUR 100% CD ------------------------------------------------------------------------------------------------------------------------------------ 30 NGC5139-NEW STIS/C ACCUM 50CCD MIRROR GAIN=4,CR-SPLIT=5,AMP=B 1 10 S MAX DUR 100% CD ------------------------------------------------------------------------------------------------------------------------------------ 40 NGC5139-NEW STIS/C ACCUM 50CCD MIRROR GAIN=4,CR-SPLIT=2,AMP=B 1 60 S MAX DUR 100% CD ------------------------------------------------------------------------------------------------------------------------------------ 8912( 2) - 06/01/01 15:10 - [ 5] Summary Form for Proposal 8912 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 50CCD ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters GAIN=4 CR-SPLIT=5 CR-SPLIT=2 AMP=B ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category CAL/STIS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 130D TO 154D BETWEEN 01-Sep-2001 AND 20-Sep-2001 SCHED 100% MAX DUR 100% SEQ 10-20 NON-INT ORIENT 310D TO 359D SCHED 100% MAX DUR 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC5139 NGC5139-NEW ------------------------------------------------------------------------------------------------------------------------------------