6929( 2) - 05/05/97 13:58 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6929 Version: 2 Check-in Date: 21-May-1996 10:40:40 1.Proposal Title: FOC Cycle 6 Absolute Sensitivity Calibration ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle CAL/FOC 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: ROBERT JEDRZEJEWSKI SPACE TELESCOPE SCIENCE INSTITUTE CoI: A. Nota STScI N CoI: M. Voit STScI N CoI: W. Hack STScI N ------------------------------------------------------------------------------------ 6. Abstract This proposal will observe the primary spectrophotometric standard star GD153 through a selection of filters designed to give good wavelength coverage and to be a representative sampling of the filters used by GOs in Cycles 4-6. The filters checked are: F120M, F152M, F140W, F175W, F220W, F253M, F275W, F342W, F430W, F470M, F480LP, F550M. ------------------------------------------------------------------------------------ 6929( 2) - 05/05/97 13:58 - [ 2] Observations Description ------------------------ To measure the throughput of the OTA + FOC we shall image the UV-optical spectrophotometric standard GD153 through a sampling of F/96 filters used by GOs and GTOs during Cycles 4-6. The filters have been precisely calibrated at the unit level. As we know their transmisison characteristics accurately, and we know the flux of the standard star, we can determine the sensitivity of the OTA + FOC from the observed FOC photon counts. The throughput must be evaluated at a number of different wavelengths. The results will be compared to those obtained in earlier cycles where possible to check for any degradation of sensitivity. In cases where we see significant deviations from the overall relation, we will warn observers of a possible discrepancy between the predicted filter transmissions and those observed. Real Time Justification ----------------------- An INT ACQ is required to place the standard star at the optimum position in the 256X256 FOC format. The small format is needed in order to obtain the best possible S/N and linearity. Calibration Justification ------------------------- This program will provide key information about the sensitivity of the FOC in those passbands used by GOs. Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: ------------------------------------------------------------------------------------ 6929( 2) - 05/05/97 13:58 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GD153 Calibration,Star RA=12H 57M 02.37S +/- 0.01S, 2000 V = 13.352 DEC=+22D 01' 53.0" +/- 0.1", TYPE=DA1 PLATE-ID=01PN 6929( 2) - 05/05/97 13:58 - [ 4] Visit: 01 Visit Requirements: 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 GD153 FOC/96 ACQ 512X102 F152M, PIXEL=50X25 1 600 S INT ACQ FOR 12-130; SEQ 4 F4ND 10-12 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 12 GD153 FOC/96 IMAGE 256X256 F501N, 1 186 S F2ND Comments: Total count rate of 57.8 ------------------------------------------------------------------------------------------------------------------------------------ 14 INTFLAT FOC/96 RESEAU 256X256 CLEAR LED=BLUE,LED-STEP=23 1 750 S ------------------------------------------------------------------------------------------------------------------------------------ 16 DARK FOC/96 IMAGE 256X256 F152M, 1 750 S F4ND ------------------------------------------------------------------------------------------------------------------------------------ 20 GD153 FOC/96 IMAGE 256X256 F152M, 1 750 S SEQ 20-40 NON-INT F4ND Comments: Total count rate of 37.7 ------------------------------------------------------------------------------------------------------------------------------------ 30 GD153 FOC/96 IMAGE 256X256 F470M, 1 750 S F4ND,F1ND Comments: Total count rate of 18.3 ------------------------------------------------------------------------------------------------------------------------------------ 40 GD153 FOC/96 IMAGE 256X256 F253M, 1 750 S NO SPLIT F4ND,F1ND Comments: Total count rate of 41.8 ------------------------------------------------------------------------------------------------------------------------------------ 44 INTFLAT FOC/96 RESEAU 256X256 CLEAR LED=BLUE,LED-STEP=24 1 750 S ------------------------------------------------------------------------------------------------------------------------------------ 46 DARK FOC/96 IMAGE 256X256 F140W, 1 750 S F6ND ------------------------------------------------------------------------------------------------------------------------------------ 50 GD153 FOC/96 IMAGE 256X256 F140W, 1 717 S SEQ 50-70 NON-INT F6ND Comments: Total count rate of 46.6 ------------------------------------------------------------------------------------------------------------------------------------ 60 GD153 FOC/96 IMAGE 256X256 F120M, 1 717 S F4ND Comments: Total count rate of 12.6 ------------------------------------------------------------------------------------------------------------------------------------ 70 GD153 FOC/96 IMAGE 256X256 F550M, 1 717 S NO SPLIT F2ND,F1ND Comments: Total count rate of 22.0 ------------------------------------------------------------------------------------------------------------------------------------ 74 INTFLAT FOC/96 RESEAU 256X256 CLEAR LED=BLUE,LED-STEP=25 1 750 S ------------------------------------------------------------------------------------------------------------------------------------ 76 DARK FOC/96 IMAGE 256X256 F342W, 1 750 S F6ND,F1ND ------------------------------------------------------------------------------------------------------------------------------------ 6929( 2) - 05/05/97 13:58 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 80 GD153 FOC/96 IMAGE 256X256 F342W, 1 758 S SEQ 80-100 NON-INT F6ND,F1ND Comments: Total count rate of 43.4 ------------------------------------------------------------------------------------------------------------------------------------ 90 GD153 FOC/96 IMAGE 256X256 F430W, 1 758 S F6ND,F1ND Comments: Total count rate of 22.1 ------------------------------------------------------------------------------------------------------------------------------------ 100 GD153 FOC/96 IMAGE 256X256 F480LP, 1 758 S NO SPLIT F4ND,F1ND Comments: Total count rate of 41.3 ------------------------------------------------------------------------------------------------------------------------------------ 104 INTFLAT FOC/96 RESEAU 256X256 CLEAR LED=BLUE,LED-STEP=26 1 750 S ------------------------------------------------------------------------------------------------------------------------------------ 106 DARK FOC/96 IMAGE 256X256 F175W, 1 750 S F6ND,F1ND ------------------------------------------------------------------------------------------------------------------------------------ 110 GD153 FOC/96 IMAGE 256X256 F175W, 1 769 S SEQ 110-130 NON-INT F6ND,F1ND ------------------------------------------------------------------------------------------------------------------------------------ 120 GD153 FOC/96 IMAGE 256X256 F220W, 1 769 S F6ND,F1ND Comments: Total count rate of 29.4 ------------------------------------------------------------------------------------------------------------------------------------ 130 GD153 FOC/96 IMAGE 256X256 F275W, 1 769 S NO SPLIT F6ND,F1ND Comments: Total count rate of 34.2 ------------------------------------------------------------------------------------------------------------------------------------ 6929( 2) - 05/05/97 13:58 - [ 6] Summary Form for Proposal 6929 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOC/96 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ IMAGE RESEAU ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters PIXEL=50X25 LED-STEP=23 LED-STEP=24 LED-STEP=25 LED-STEP=26 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category CAL/FOC ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements INT ACQ FOR 12-130; SEQ 10-12 NON-INT SEQ 20-40 NON-INT NO SPLIT SEQ 50-70 NON-INT SEQ 80-100 NON-INT SEQ 110-130 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F152M,F4ND F501N,F2ND CLEAR F470M,F4ND,F1ND F253M,F4ND,F1ND F140W,F6ND F120M,F4ND F550M,F2ND,F1ND F342W,F6ND,F1ND F430W,F6ND,F1ND F480LP,F4ND,F1ND F175W,F6ND,F1ND F220W,F6ND,F1ND F275W,F6ND,F1ND ------------------------------------------------------------------------------------------------------------------------------------ Target Names GD153 INTFLAT DARK ------------------------------------------------------------------------------------------------------------------------------------