6908( 5) - 11/20/96 10:53 - [ 0] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6908 Version: 5 Check-in Date: 20-Nov-1996 10:46:05 1.Proposal Title: WFPC2 CYCLE 6 CAL: UV FLATS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle CAL/WF2 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: STEFANO CASERTANO SPACE TELESCOPE SCIENCE INSTITUTE ------------------------------------------------------------------------------------ 6. Abstract UV flat fields will be obtained with the cal-channel's ultraviolet lamp (UVFLAT) using the UV filter set (F122M, F170W, F160BW, F185W, and F336W). The UV flats will be used to monitor UV flat field stability and the stability of the Woods filter (F160BW) by using F170W as the control. The F336W ratio of VISFLAT (Cycle 6 proposal 0005)/UVFLAT ratio will provide a diagnostic of the UV flat field degradation and tie the UVFLAT and VISFLAT flat field patterns together. Two supplemental darkframes must be obtained immediately after each use of the lamp, in order to check for possible afterimages. ------------------------------------------------------------------------------------ Observations Description ------------------------ Execute before and after the refurbishment mission, immediately after a decontamination procedure. UV flats are obtained with the UV filter set (F122M, F170W, F160BW, F185W, and F336W); each UV lamp usage is followed by two darks. Since the UV lamp is degrading over time, its use must be minimized: this proposal is the only one to use the lamp during Cycle 6, for a total of 4 lamp cycles. Note: the SU duration for each UVFLAT visit should be kept the same as the durations used during Cycle 5 (proposal 6191); the lamp should not remain on for periods of time longer than those used in Cycle 5. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6908( 5) - 11/20/96 10:53 - [ 1] Visit: 01 Visit Requirements: GROUP 1-4 WITHIN 12H; SEQ 1-2 WITHIN 5M On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER A DECON. BEFORE REFURBISHMENT MISSION Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 UVFLAT WFPC2 IMAGE WFALL F160BW ATD-GAIN=7,CR-SPLIT=NO 1 1000 S ------------------------------------------------------------------------------------------------------------------------------------ 20 UVFLAT WFPC2 IMAGE WFALL F185W ATD-GAIN=7,CR-SPLIT=NO 1 600 S ------------------------------------------------------------------------------------------------------------------------------------ 6908( 5) - 11/20/96 10:53 - [ 2] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER VISIT 1 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 60 DARK WFPC2 IMAGE WFALL DEF CR-SPLIT=NO,CLOCKS=NO,ATD-GAIN=7 2 1800 S ------------------------------------------------------------------------------------------------------------------------------------ 6908( 5) - 11/20/96 10:53 - [ 3] Visit: 03 Visit Requirements: SEQ 3-4 WITHIN 5M On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER DECON Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 UVFLAT WFPC2 IMAGE WFALL F122M ATD-GAIN=7,CR-SPLIT=NO 1 1000 S ------------------------------------------------------------------------------------------------------------------------------------ 20 UVFLAT WFPC2 IMAGE WFALL F170W ATD-GAIN=7,CR-SPLIT=NO 1 400 S ------------------------------------------------------------------------------------------------------------------------------------ 30 UVFLAT WFPC2 IMAGE WFALL F336W ATD-GAIN=7,CR-SPLIT=NO 1 30 S ------------------------------------------------------------------------------------------------------------------------------------ 6908( 5) - 11/20/96 10:53 - [ 4] Visit: 04 Visit Requirements: On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER VISIT 3 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 60 DARK WFPC2 IMAGE WFALL DEF CR-SPLIT=NO,CLOCKS=NO,ATD-GAIN=7 2 1800 S ------------------------------------------------------------------------------------------------------------------------------------ 6908( 5) - 11/20/96 10:53 - [ 5] Visit: 05 Visit Requirements: GROUP 5-8 WITHIN 12H; SEQ 5-6 WITHIN 5M On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER A DECON. AFTER REFURB. MISSION Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 UVFLAT WFPC2 IMAGE WFALL F160BW ATD-GAIN=7,CR-SPLIT=NO 1 1000 S ------------------------------------------------------------------------------------------------------------------------------------ 20 UVFLAT WFPC2 IMAGE WFALL F185W ATD-GAIN=7,CR-SPLIT=NO 1 600 S ------------------------------------------------------------------------------------------------------------------------------------ 6908( 5) - 11/20/96 10:53 - [ 6] Visit: 06 Visit Requirements: On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER VISIT 5 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 60 DARK WFPC2 IMAGE WFALL DEF CR-SPLIT=NO,CLOCKS=NO,ATD-GAIN=7 2 1800 S ------------------------------------------------------------------------------------------------------------------------------------ 6908( 5) - 11/20/96 10:53 - [ 7] Visit: 07 Visit Requirements: SEQ 7-8 WITHIN 5M On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER DECON Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 UVFLAT WFPC2 IMAGE WFALL F122M ATD-GAIN=7,CR-SPLIT=NO 1 1000 S ------------------------------------------------------------------------------------------------------------------------------------ 20 UVFLAT WFPC2 IMAGE WFALL F170W ATD-GAIN=7,CR-SPLIT=NO 1 400 S ------------------------------------------------------------------------------------------------------------------------------------ 30 UVFLAT WFPC2 IMAGE WFALL F336W ATD-GAIN=7,CR-SPLIT=NO 1 30 S ------------------------------------------------------------------------------------------------------------------------------------ 6908( 5) - 11/20/96 10:53 - [ 8] Visit: 08 Visit Requirements: On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER VISIT 7 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 60 DARK WFPC2 IMAGE WFALL DEF CR-SPLIT=NO,CLOCKS=NO,ATD-GAIN=7 2 1800 S ------------------------------------------------------------------------------------------------------------------------------------ 6908( 5) - 11/20/96 10:53 - [ 9] Summary Form for Proposal 6908 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN=7 CR-SPLIT=NO CLOCKS=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category CAL/WF2 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GROUP 1-4 WITHIN 12H; SEQ 1-2 WITHIN 5M SEQ 3-4 WITHIN 5M GROUP 5-8 WITHIN 12H; SEQ 5-6 WITHIN 5M SEQ 7-8 WITHIN 5M ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160BW F185W DEF F122M F170W F336W ------------------------------------------------------------------------------------------------------------------------------------ Target Names UVFLAT DARK ------------------------------------------------------------------------------------------------------------------------------------