12736( 2) - 19-Sep-2011 15:40:26 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12736 Version: 2 Check-in Time: 19-Sep-2011 15:40:26 STScI Edit Number: 0 Title SBC Dark Current Measurement ------------------------------------------------------------------------------------ Type Cycle CAL/ACS 19 ------------------------------------------------------------------------------------ Investigators Contact? PI: Ms. Pey Lian Lim Space Telescope Science Institute CoI: Dr. David A. Golimowski Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract This takes a series of SBC dark measurements over a continuous period of about 6 hours (4 orbits). The aim is to collect dark images during an extended SBC on-time. Earlier measurements indicate that the dark current increases with SBC on-time and may also be increasing with overall SBC use. The 6-hour time matches the longest time used by any observer. As with all SBC observations this needs continuous SAA free time. This program is executed once per cycle. The last exposures were taken in Mar 2011 under Program 12391. ------------------------------------------------------------------------------------ Observations Description ------------------------ Five 1000-second darks are taken in each of four orbits. The SBC will thereby be kept on continuously for about 6 hours. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12736( 2) - 19-Sep-2011 15:40:26 - [ 2] Visit: 01 Visit Requirements: GYRO MODE 3GOBAD; BETWEEN 01-MAR-2012:00:00:00 AND 31-MAR-2012:00:00:00 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 DARK ACS/SBC ACCUM SBC DEF 5 1000.0 S SAA CONTOUR 28 ------------------------------------------------------------------------------------------------------------------------------------ 2 DARK ACS/SBC ACCUM SBC DEF 5 1000.0 S SAA CONTOUR 28 ------------------------------------------------------------------------------------------------------------------------------------ 3 DARK ACS/SBC ACCUM SBC DEF 5 1000.0 S SAA CONTOUR 28 ------------------------------------------------------------------------------------------------------------------------------------ 4 DARK ACS/SBC ACCUM SBC DEF 5 1000.0 S SAA CONTOUR 28 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ DARK 1 ACS/SBC ACCUM SBC DEF none none 1 none 1 N/A DARK 1 ACS/SBC ACCUM SBC DEF none none 2 none 1 N/A DARK 1 ACS/SBC ACCUM SBC DEF none none 3 none 1 N/A DARK 1 ACS/SBC ACCUM SBC DEF none none 4 none 1 N/A DARK 1 ACS/SBC ACCUM SBC DEF none none 5 none 1 N/A DARK 2 ACS/SBC ACCUM SBC DEF none none 1 none 1 N/A DARK 2 ACS/SBC ACCUM SBC DEF none none 2 none 2 N/A DARK 2 ACS/SBC ACCUM SBC DEF none none 3 none 2 N/A DARK 2 ACS/SBC ACCUM SBC DEF none none 4 none 2 N/A DARK 2 ACS/SBC ACCUM SBC DEF none none 5 none 2 N/A DARK 3 ACS/SBC ACCUM SBC DEF none none 1 none 2 N/A DARK 3 ACS/SBC ACCUM SBC DEF none none 2 none 2 N/A DARK 3 ACS/SBC ACCUM SBC DEF none none 3 none 3 N/A DARK 3 ACS/SBC ACCUM SBC DEF none none 4 none 3 N/A DARK 3 ACS/SBC ACCUM SBC DEF none none 5 none 3 N/A DARK 4 ACS/SBC ACCUM SBC DEF none none 1 none 3 N/A DARK 4 ACS/SBC ACCUM SBC DEF none none 2 none 3 N/A DARK 4 ACS/SBC ACCUM SBC DEF none none 3 none 3 N/A DARK 4 ACS/SBC ACCUM SBC DEF none none 4 none 4 N/A DARK 4 ACS/SBC ACCUM SBC DEF none none 5 none 4 N/A 12736( 2) - 19-Sep-2011 15:40:26 - [ 3] Summary Form for Proposal 12736 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures SBC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/SBC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-MAR-2012:00:00:00 AND 31-MAR-2012:00:00:00, GYRO MODE 3GOBAD, SAA CONTOUR 28 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements DEF ------------------------------------------------------------------------------------------------------------------------------------ Target Names DARK ------------------------------------------------------------------------------------------------------------------------------------