6191( 2) - 07/24/95 11:47 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6191 Version: 2 Check-in Date: ********** 1.Proposal Title: WFPC2 CYCLE 4 CAL: UV FLATS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle CAL/WFC 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: BURROWS, CHRIS STSCI CoI: BAGGETT, SYLVIA STSCI N ------------------------------------------------------------------------------------ 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 5 proposal 6189)/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 ------------------------ Twice during Cycle 5, 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 5, for a total of 4 lamp cycles; execution dates are planned for 9/95 and 3/96. Note: the SU duration for each UVFLAT visit should be kept the same as the durations used during Cycle 4 (proposal 5655); the lamp should not remain on for periods of time longer than those used in Cycle 4. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 6191( 2) - 07/24/95 11:47 - [ 2] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6191( 2) - 07/24/95 11:47 - [ 3] Visit: 11 Visit Requirements: GROUP 11-14 WITHIN 12H; SEQ 11-12 WITHIN 5M On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER A 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 F160BW ATD-GAIN=7, CR- 1 1000S SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 20 UVFLAT WFPC2 IMAGE WFALL F185W ATD-GAIN=7, CR- 1 600S SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 6191( 2) - 07/24/95 11:47 - [ 4] Visit: 12 Visit Requirements: On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER VISIT 11 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, 2 1800S CLOCKS=NO, ATD- GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 6191( 2) - 07/24/95 11:47 - [ 5] Visit: 13 Visit Requirements: SEQ 13-14 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- 1 1000S SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 20 UVFLAT WFPC2 IMAGE WFALL F170W ATD-GAIN=7, CR- 1 400S SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 30 UVFLAT WFPC2 IMAGE WFALL F336W ATD-GAIN=7, CR- 1 30S SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 6191( 2) - 07/24/95 11:47 - [ 6] Visit: 14 Visit Requirements: On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER VISIT 13 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, 2 1800S CLOCKS=NO, ATD- GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 6191( 2) - 07/24/95 11:47 - [ 7] Visit: 21 Visit Requirements: GROUP 21-24 WITHIN 12H; SEQ 21-22 WITHIN 5M On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER A 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 F160BW ATD-GAIN=7, CR- 1 1000S SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 20 UVFLAT WFPC2 IMAGE WFALL F185W ATD-GAIN=7, CR- 1 600S SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 6191( 2) - 07/24/95 11:47 - [ 8] Visit: 22 Visit Requirements: On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER VISIT 21 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, 2 1800S CLOCKS=NO, ATD- GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 6191( 2) - 07/24/95 11:47 - [ 9] Visit: 23 Visit Requirements: SEQ 23-24 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- 1 1000S SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 20 UVFLAT WFPC2 IMAGE WFALL F170W ATD-GAIN=7, CR- 1 400S SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 30 UVFLAT WFPC2 IMAGE WFALL F336W ATD-GAIN=7, CR- 1 30S SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 6191( 2) - 07/24/95 11:47 - [ 10] Visit: 24 Visit Requirements: On Hold Comments: Additional Comments: SCHEDULE IMMEDIATELY AFTER VISIT 23 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, 2 1800S CLOCKS=NO, ATD- GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 6191( 2) - 07/24/95 11:47 - [ 11] Summary Form for Proposal 6191 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN=7 CR-SPLIT=NO CLOCKS=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category CAL/WFC ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GROUP 11-14 WITHIN 12H; SEQ 11-12 WITHIN 5M SEQ 13-14 WITHIN 5M GROUP 21-24 WITHIN 12H; SEQ 21-22 WITHIN 5M SEQ 23-24 WITHIN 5M ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160BW F185W DEF F122M F170W F336W ------------------------------------------------------------------------------------------------------------------------------------ Target Names UVFLAT DARK ------------------------------------------------------------------------------------------------------------------------------------