16554( 2) - 01-Jul-2021 00:05:57 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16554 Version: 2 Check-in Time: 01-Jul-2021 00:05:57 STScI Edit Number: 0 Title STIS MAMA Full Field Sensitivity ------------------------------------------------------------------------------------ Type Cycle CAL/STIS 29 ------------------------------------------------------------------------------------ Investigators Contact? PI: Sean Lockwood Space Telescope Science Institute Y CoI: Doug Branton Space Telescope Science Institute Y ------------------------------------------------------------------------------------ Abstract The purpose of this program is to monitor the sensitivity of the MAMA detectors over the full field. This is achieved by observing the globular cluster NGC6681 once during the cycle. The data can be directly compared with similar data obtained in previous cycles. ------------------------------------------------------------------------------------ Observations Description ------------------------ By observing the globular cluster NGC6681 once every year at roughly the same orientation modulo 180 degrees (to keep the same stars in the same area of the detectors), we will monitor the full field sensitivity of the MAMA detectors and also monitor the astrometric and PSF stability. These observations will be used to look for contamination, throughput changes, or formation of color centers in the photocathode and window that might be missed by spectroscopic monitoring or difficult to interpret in flat-fielding. The apertures to be used are F25SRF2, F25QTZ, and F25CN182 for the NUVMAMA, and 25MAMA, F25QTZ, and F25SRF2 for the FUVMAMA. Fluxes are taken from the paper by Watson et al. (1994, ApJ 435, L55). See SMOV proposal 7132. The primary tests (F25SRF2+NUVMAMA, and 25MAMA+FUVMAMA) image in a 4-step pattern using both MAMA detectors, with a 5-minute integration at each pointing. In this way, we will image many of the approximately 45 stars in the field on different places within the MAMA field of view. Counts from the brightest stars are expected to be ~100 count/sec and 60 count/sec for the FUV-MAMA and NUV-MAMA, respectively. Five-minute exposures are therefore sufficient to obtain counting statistics to allow signal-to-noise ~100. Other filters are observed at only a single pointing position, to look for color changes. ------ Calibration Justification ------- Creation of ISRs, phometric and astrometric accuracy and stability information for GOs and reference files. ---Cycle 29---- no changes, copied from 16351 changed before date to June 16, 2022 16554( 2) - 01-Jul-2021 00:05:57 - [ 2] ------------------------------------------------------------------------------------ 16554( 2) - 01-Jul-2021 00:05:57 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC6681 CALIBRATION, RA=18H43M12.8100S +/- 0.1S, J2000 V = 15.0 F-CONT(1600)=2e-15 ASTROMETRIC, DETECTOR DEC=-32D17'33.60" +/- 1.0" SENSITIVITY TEST, INSTRUMENT SENSITIVITY TEST, POINT SPREAD FUNCTION, THROUGHPUT TEST Reference Frame: ICRS Comments: Previous versions of this proposal (e.g., 7080, 8918, 9623, or 10032) used coordinates 18:43:12.8 -32 17 34.00. Using the GSC1-to-GSC2 conversion tool gives the revised coordinates 18:43:21.81 -32 17 33.6, which we adopt for this proposal. ------------------------------------------------------------------------------------------------------------------------------------ 16554( 2) - 01-Jul-2021 00:05:57 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type STIS-SPIRAL-DITH Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 10.0 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 0.0 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 16554( 2) - 01-Jul-2021 00:05:57 - [ 5] Visit: 01 Visit Requirements: ORIENT 260.0D TO 266.0 D; BEFORE 16-JUN-2022:00:00:00 On Hold Comments: Additional Comments: Orient range chosen to cover range of orients obtained during the last four iterations of this monitor (programs 8918, 9623, 10032, and 11856). 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 NGC6681 STIS/NUV ACCUM F25SRF2 MIRROR 1 300.0 S PATTERN 1 1 -MAMA (1200 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC6681 STIS/NUV ACCUM F25QTZ MIRROR 1 300.0 S -MAMA (300 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC6681 STIS/NUV ACCUM F25CN182 MIRROR 1 300.0 S -MAMA (300 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC6681 STIS/NUV ACCUM F25SRF2 MIRROR 1 300.0 S -MAMA (300 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC6681 STIS/NUV ACCUM F25QTZ MIRROR 1 300.0 S -MAMA (300 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC6681 STIS/NUV ACCUM F25CN182 MIRROR 1 300.0 S -MAMA (300 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC6681 STIS/FUV ACCUM 25MAMA MIRROR 1 400.0 S PATTERN 1 7 -MAMA (1600 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC6681 STIS/FUV ACCUM F25QTZ MIRROR 1 400.0 S -MAMA (400 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC6681 STIS/FUV ACCUM F25SRF2 MIRROR 1 400.0 S -MAMA (400 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC6681 STIS/FUV ACCUM 25MAMA MIRROR 1 400.0 S -MAMA (400 S) ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC6681 STIS/FUV ACCUM F25QTZ MIRROR 1 400.0 S -MAMA (400 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC6681 STIS/FUV ACCUM F25SRF2 MIRROR 1 400.0 S -MAMA (400 S) ------------------------------------------------------------------------------------------------------------------------------------ 16554( 2) - 01-Jul-2021 00:05:57 - [ 6] 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC6681 1 STIS/NUV ACCUM F25SRF2 MIRROR 1 none none none 1 N/A -MAMA NGC6681 1 STIS/NUV ACCUM F25SRF2 MIRROR 2 none none none 1 N/A -MAMA NGC6681 1 STIS/NUV ACCUM F25SRF2 MIRROR 3 none none none 1 N/A -MAMA NGC6681 1 STIS/NUV ACCUM F25SRF2 MIRROR 4 none none none 1 N/A -MAMA NGC6681 2 STIS/NUV ACCUM F25QTZ MIRROR none none none none 1 N/A -MAMA NGC6681 3 STIS/NUV ACCUM F25CN182 MIRROR none none none none 1 N/A -MAMA NGC6681 4 STIS/NUV ACCUM F25SRF2 MIRROR none none none none 1 N/A -MAMA NGC6681 5 STIS/NUV ACCUM F25QTZ MIRROR none none none none 2 N/A -MAMA NGC6681 6 STIS/NUV ACCUM F25CN182 MIRROR none none none none 2 N/A -MAMA NGC6681 7 STIS/FUV ACCUM 25MAMA MIRROR 1 none none none 2 N/A -MAMA NGC6681 7 STIS/FUV ACCUM 25MAMA MIRROR 2 none none none 2 N/A -MAMA NGC6681 7 STIS/FUV ACCUM 25MAMA MIRROR 3 none none none 2 N/A -MAMA NGC6681 7 STIS/FUV ACCUM 25MAMA MIRROR 4 none none none 2 N/A -MAMA NGC6681 8 STIS/FUV ACCUM F25QTZ MIRROR none none none none 3 N/A -MAMA NGC6681 9 STIS/FUV ACCUM F25SRF2 MIRROR none none none none 3 N/A -MAMA NGC6681 10 STIS/FUV ACCUM 25MAMA MIRROR none none none none 3 N/A -MAMA NGC6681 11 STIS/FUV ACCUM F25QTZ MIRROR none none none none 3 N/A -MAMA NGC6681 12 STIS/FUV ACCUM F25SRF2 MIRROR none none none none 3 N/A -MAMA 16554( 2) - 01-Jul-2021 00:05:57 - [ 7] Summary Form for Proposal 16554 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 25MAMA, F25CN182, F25QTZ, F25SRF2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/FUV-MAMA, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BEFORE 16-JUN-2022:00:00:00, ORIENT 260.0D TO 266.0 D, PATTERN 1 1, PATTERN 1 7 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC6681 ------------------------------------------------------------------------------------------------------------------------------------