12346( 3) - 12-Oct-2010 14:02:22 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12346 Version: 3 Check-in Time: 12-Oct-2010 14:02:22 STScI Edit Number: 2 Title WFC3 UVIS CCD Gain ------------------------------------------------------------------------------------ Type Cycle CAL/WFC3 17 ------------------------------------------------------------------------------------ Investigators Contact? PI: Ms. Cheryl Pavlovsky Space Telescope Science Institute CoI: Ms. Tiffany Borders Space Telescope Science Institute N CoI: Dr. Sylvia M. Baggett Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract The absolute gain of each quadrant of the WFC3 UVIS detector will be measured for the nominal detector readout configuration and at the on-orbit operating temperature. ------------------------------------------------------------------------------------ Observations Description ------------------------ The absolute gain of each quadrant for the nominal detector readout configuration (ABCD, gain=1.5 e-/DN, bin=NONE) will be measured at two epochs spread throughout Cycle 18, all orbits are internal. Both epochs consist of 5 visits (5 orbits). The gain will be measured by taking 8 full frame pairs of internal flat fields, illuminated with the UVIS default tungsten lamp (TUNG3) through F645N, over a full range of exposure levels to achieve count rates of ~500 to 50, 000e-. This is a monitor program and is a continuation of program 11906 in Cycle 17. The count rate for the TUNG3 lamp with F645N was measured in TV3 and Cycle 17. In the "raw" frames (no overscan bias subtraction), the count rate is approximately 428e-/pix/s, assuming a gain of 1.56 e-/DN. The full well of the CCD is roughly 75000 e- (42000 DN). The integration times are therefore chosen such that the full range of exposure levels is covered with minimal gaps. Full frames match the observing mode of the majority of GO science, provide good statistics, and allow the gain variability to be checked across the FOV. The gain will be measured using the standard mean-variance technique. Average and difference images from each flatfield pair will be created and mean-variance plots will be constructed from the mean of the average image and the variance of the difference image. The inverse slope of the mean signal level versus the variance is the gain. The required accuracy for this program is 1%. Real Time Justification ----------------------- Calibration Justification ------------------------- 12346( 3) - 12-Oct-2010 14:02:22 - [ 2] All UVIS frames require transformations from DNs to e- in the pipeline. Updated measured gain values for each quadrant will be uploaded to the CDBS CCDTAB file. An ISR will be published describing the data and analysis. Additional Comments ------------------- BETWEENs are used to schedule the first epoch of visits 6 months after the execution of the Cycle 17 data and the second epoch of visits 6 months after that. ------------------------------------------------------------------------------------ 12346( 3) - 12-Oct-2010 14:02:22 - [ 3] Visit: 11 Visit Requirements: BETWEEN 01-DEC-2010:00:00:00 AND 31-JAN-2011:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TUNGSTEN WFC3/UVI ACCUM UVIS1-M51 F645N 1 60 S SEQ 1-2 NON-INT S 2-SUB ------------------------------------------------------------------------------------------------------------------------------------ 2 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 105.0 S S ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ TUNGSTEN 1 WFC3/UVI ACCUM UVIS1-M5 F645N none none none none 1 N/A S 12-SUB TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S 12346( 3) - 12-Oct-2010 14:02:22 - [ 4] Visit: 12 Visit Requirements: BETWEEN 01-DEC-2010:00:00:00 AND 31-JAN-2011:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TUNGSTEN WFC3/UVI ACCUM UVIS1-M51 F645N 1 60 S SEQ 1-2 NON-INT S 2-SUB ------------------------------------------------------------------------------------------------------------------------------------ 2 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 80.0 S S ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ TUNGSTEN 1 WFC3/UVI ACCUM UVIS1-M5 F645N none none none none 1 N/A S 12-SUB TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S 12346( 3) - 12-Oct-2010 14:02:22 - [ 5] Visit: 13 Visit Requirements: BETWEEN 01-DEC-2010:00:00:00 AND 31-JAN-2011:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TUNGSTEN WFC3/UVI ACCUM UVIS1-M51 F645N 1 60 S SEQ 1-3 NON-INT S 2-SUB ------------------------------------------------------------------------------------------------------------------------------------ 2 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 45.0 S S ------------------------------------------------------------------------------------------------------------------------------------ 3 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 1.0 S S ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ TUNGSTEN 1 WFC3/UVI ACCUM UVIS1-M5 F645N none none none none 1 N/A S 12-SUB TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S TUNGSTEN 3 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 3 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S 12346( 3) - 12-Oct-2010 14:02:22 - [ 6] Visit: 14 Visit Requirements: BETWEEN 01-DEC-2010:00:00:00 AND 31-JAN-2011:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TUNGSTEN WFC3/UVI ACCUM UVIS1-M51 F645N 1 60 S SEQ 1-3 NON-INT S 2-SUB ------------------------------------------------------------------------------------------------------------------------------------ 2 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 12.0 S S ------------------------------------------------------------------------------------------------------------------------------------ 3 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 5.0 S S ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ TUNGSTEN 1 WFC3/UVI ACCUM UVIS1-M5 F645N none none none none 1 N/A S 12-SUB TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S TUNGSTEN 3 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 3 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S 12346( 3) - 12-Oct-2010 14:02:22 - [ 7] Visit: 15 Visit Requirements: BETWEEN 01-DEC-2010:00:00:00 AND 31-JAN-2011:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TUNGSTEN WFC3/UVI ACCUM UVIS1-M51 F645N 1 60 S SEQ 1-3 NON-INT S 2-SUB ------------------------------------------------------------------------------------------------------------------------------------ 2 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 25.0 S S ------------------------------------------------------------------------------------------------------------------------------------ 3 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 2.0 S S ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ TUNGSTEN 1 WFC3/UVI ACCUM UVIS1-M5 F645N none none none none 1 N/A S 12-SUB TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S TUNGSTEN 3 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 3 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S 12346( 3) - 12-Oct-2010 14:02:22 - [ 8] Visit: 21 Visit Requirements: BETWEEN 01-JUN-2011:00:00:00 AND 31-JUL-2011:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TUNGSTEN WFC3/UVI ACCUM UVIS1-M51 F645N 1 60 S SEQ 1-2 NON-INT S 2-SUB ------------------------------------------------------------------------------------------------------------------------------------ 2 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 105.0 S S ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ TUNGSTEN 1 WFC3/UVI ACCUM UVIS1-M5 F645N none none none none 1 N/A S 12-SUB TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S 12346( 3) - 12-Oct-2010 14:02:22 - [ 9] Visit: 22 Visit Requirements: BETWEEN 01-JUN-2011:00:00:00 AND 31-JUL-2011:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TUNGSTEN WFC3/UVI ACCUM UVIS1-M51 F645N 1 60 S SEQ 1-2 NON-INT S 2-SUB ------------------------------------------------------------------------------------------------------------------------------------ 2 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 80.0 S S ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ TUNGSTEN 1 WFC3/UVI ACCUM UVIS1-M5 F645N none none none none 1 N/A S 12-SUB TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S 12346( 3) - 12-Oct-2010 14:02:22 - [ 10] Visit: 23 Visit Requirements: BETWEEN 01-JUN-2011:00:00:00 AND 31-JUL-2011:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TUNGSTEN WFC3/UVI ACCUM UVIS1-M51 F645N 1 60 S SEQ 1-3 NON-INT S 2-SUB ------------------------------------------------------------------------------------------------------------------------------------ 2 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 45.0 S S ------------------------------------------------------------------------------------------------------------------------------------ 3 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 1.0 S S ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ TUNGSTEN 1 WFC3/UVI ACCUM UVIS1-M5 F645N none none none none 1 N/A S 12-SUB TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S TUNGSTEN 3 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 3 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S 12346( 3) - 12-Oct-2010 14:02:22 - [ 11] Visit: 24 Visit Requirements: BETWEEN 01-JUN-2011:00:00:00 AND 31-JUL-2011:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TUNGSTEN WFC3/UVI ACCUM UVIS1-M51 F645N 1 60 S SEQ 1-3 NON-INT S 2-SUB ------------------------------------------------------------------------------------------------------------------------------------ 2 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 12.0 S S ------------------------------------------------------------------------------------------------------------------------------------ 3 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 5.0 S S ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ TUNGSTEN 1 WFC3/UVI ACCUM UVIS1-M5 F645N none none none none 1 N/A S 12-SUB TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S TUNGSTEN 3 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 3 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S 12346( 3) - 12-Oct-2010 14:02:22 - [ 12] Visit: 25 Visit Requirements: BETWEEN 01-JUN-2011:00:00:00 AND 31-JUL-2011:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TUNGSTEN WFC3/UVI ACCUM UVIS1-M51 F645N 1 60 S SEQ 1-3 NON-INT S 2-SUB ------------------------------------------------------------------------------------------------------------------------------------ 2 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 25.0 S S ------------------------------------------------------------------------------------------------------------------------------------ 3 TUNGSTEN WFC3/UVI ACCUM UVIS F645N GAIN=1.5 2 2.0 S S ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ TUNGSTEN 1 WFC3/UVI ACCUM UVIS1-M5 F645N none none none none 1 N/A S 12-SUB TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 2 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S TUNGSTEN 3 WFC3/UVI ACCUM UVIS F645N none none 1 none 1 N/A S TUNGSTEN 3 WFC3/UVI ACCUM UVIS F645N none none 2 none 1 N/A S 12346( 3) - 12-Oct-2010 14:02:22 - [ 13] Summary Form for Proposal 12346 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS, UVIS1-M512-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters GAIN=1.5 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-DEC-2010:00:00:00 AND 31-JAN-2011:00:00:00, BETWEEN 01-JUN-2011:00:00:00 AND 31-JUL-2011:00:00:00, SEQ 1-2 NON-INT, SEQ 1-3 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F645N ------------------------------------------------------------------------------------------------------------------------------------ Target Names TUNGSTEN ------------------------------------------------------------------------------------------------------------------------------------