15766( 2) - 14-Aug-2019 17:55:01 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15766 Version: 2 Check-in Time: 14-Aug-2019 17:55:01 STScI Edit Number: 0 Title ACS SBC Darks ------------------------------------------------------------------------------------ Type Cycle CAL/ACS 27 ------------------------------------------------------------------------------------ Investigators Contact? PI: Roberto Avila Space Telescope Science Institute Y ------------------------------------------------------------------------------------ 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 April 2019 under Program 15528. ------------------------------------------------------------------------------------ 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. ------------------------------------------------------------------------------------ 15766( 2) - 14-Aug-2019 17:55:01 - [ 2] Visit: 01 Visit Requirements: GYRO MODE 3GOBAD; BETWEEN 01-MAR-2020:00:00:00 AND 01-APR-2020:00:00:00 On Hold Comments: Additional Comments: HOPR repeat of visit 01 (ACS suspend) Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 DARK ACS/SBC ACCUM SBC DEF 5 1000.0 S SAA CONTOUR 28 (5000 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 DARK ACS/SBC ACCUM SBC DEF 5 1000.0 S SAA CONTOUR 28 (5000 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 DARK ACS/SBC ACCUM SBC DEF 5 1000.0 S SAA CONTOUR 28 (5000 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 DARK ACS/SBC ACCUM SBC DEF 5 1000.0 S SAA CONTOUR 28 (5000 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 4 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 15766( 2) - 14-Aug-2019 17:55:01 - [ 3] Summary Form for Proposal 15766 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures SBC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/SBC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-MAR-2020:00:00:00 AND 01-APR-2020:00:00:00, GYRO MODE 3GOBAD, SAA CONTOUR 28 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements DEF ------------------------------------------------------------------------------------------------------------------------------------ Target Names DARK ------------------------------------------------------------------------------------------------------------------------------------