8918( 3) - 01/14/02 10:47 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 8918 Version: 3 Check-in Date: 14-Jan-2002 10:46:24 1.Proposal Title: MAMA Full Field Sensitivity Monitor & PSF Check ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle CAL/STIS 10 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Bahram Mobasher Space Telescope Science Institute CoI: James Davies Space Telescope Science Institute N ------------------------------------------------------------------------------------ 5. Abstract The purpose of this program is to monitor the sensitivity of the MAMA detectors over the full field. This is achieved by observing globular cluster NGC6681 twice during Cycle 10. The data can be directly compared with similar data obtained in Cycles 7, 8 and 9. ------------------------------------------------------------------------------------ 8918( 3) - 01/14/02 10:47 - [ 2] Observations Description ------------------------ By observing the globular cluster NGC6681 periodically once every 6 months 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 colour centers in the photocathode and window that might be missed by spectroscopic monitoring or difficult to interpret in flatfielding. On the first and third visit, apertures 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) images in a 4 step pattern using both MAMA detectors, with a 5 minute integration at each pointing. In this way we will obtain the image of 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 observed at only a single pointing position, to look for color changes. Real Time Justification ----------------------- Calibration Justification ------------------------- Creation of ISRs, phometric and astrometric accuracy and stabilitiy information for GOs and reference files. Additional Comments ------------------- ------------------------------------------------------------------------------------ 8918( 3) - 01/14/02 10:47 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC6681 CALIBRATION, RA=18H 43M 12.8S +/- .1S, DEC=- J2000 F-CONT(1600)=2e-15 ASTROMETRIC, STELLAR 32D 17' 34" +/- 1" V = 15 CLUSTER, GLOBULAR CLUSTER Coordinate Source: OTHER_SOURCE Comments: Fluxes from the paper by Watson et al (1994, Ap.J. 435, L55) 8918( 3) - 01/14/02 10:47 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 111 Primary_Pattern Secondary_Pattern Pattern_Type STIS-SPIRAL-DITH Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 10 Coordinate_Frame POS-TARG Pattern_Orient 0 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 8918( 3) - 01/14/02 10:47 - [ 5] Visit: 01 Visit Priority: Visit Requirements: SCHED 100% BETWEEN 15-Sep-2001 AND 1-Oct-2001 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC6681 STIS/N ACCUM F25SRF2 MIRROR 1 300 S MAX DUR 100% PATTERN 111 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 20 NGC6681 STIS/N ACCUM F25QTZ MIRROR 1 300 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 30 NGC6681 STIS/N ACCUM F25CN18 MIRROR 1 300 S MAX DUR 100% UV-MAM 2 A ------------------------------------------------------------------------------------------------------------------------------------ 50 NGC6681 STIS/N ACCUM F25SRF2 MIRROR 1 300 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 60 NGC6681 STIS/N ACCUM F25QTZ MIRROR 1 300 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 70 NGC6681 STIS/N ACCUM F25CN18 MIRROR 1 300 S MAX DUR 100% UV-MAM 2 A ------------------------------------------------------------------------------------------------------------------------------------ 80 NGC6681 STIS/F ACCUM 25MAMA MIRROR 1 400 S MAX DUR 100% PATTERN 111 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 90 NGC6681 STIS/F ACCUM F25QTZ MIRROR 1 400 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 100 NGC6681 STIS/F ACCUM F25SRF2 MIRROR 1 400 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 110 NGC6681 STIS/F ACCUM 25MAMA MIRROR 1 400 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 120 NGC6681 STIS/F ACCUM F25QTZ MIRROR 1 400 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 8918( 3) - 01/14/02 10:47 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 130 NGC6681 STIS/F ACCUM F25SRF2 MIRROR 1 400 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 8918( 3) - 01/14/02 10:47 - [ 7] Visit: 02 Visit Priority: Visit Requirements: SCHED 100% BETWEEN 18-FEB-2002 AND 04-MAR-2002 On Hold Comments: Additional Comments: ~6 months after first visit Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC6681 STIS/N ACCUM F25SRF2 MIRROR 1 300 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 20 NGC6681 STIS/N ACCUM F25QTZ MIRROR 1 300 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 30 NGC6681 STIS/N ACCUM F25CN18 MIRROR 1 300 S MAX DUR 100% UV-MAM 2 A ------------------------------------------------------------------------------------------------------------------------------------ 50 NGC6681 STIS/N ACCUM F25SRF2 MIRROR 1 300 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 60 NGC6681 STIS/N ACCUM F25QTZ MIRROR 1 300 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 70 NGC6681 STIS/N ACCUM F25CN18 MIRROR 1 300 S MAX DUR 100% UV-MAM 2 A ------------------------------------------------------------------------------------------------------------------------------------ 80 NGC6681 STIS/F ACCUM 25MAMA MIRROR 1 400 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 90 NGC6681 STIS/F ACCUM F25QTZ MIRROR 1 400 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 100 NGC6681 STIS/F ACCUM F25SRF2 MIRROR 1 400 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 110 NGC6681 STIS/F ACCUM 25MAMA MIRROR 1 400 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 120 NGC6681 STIS/F ACCUM F25QTZ MIRROR 1 400 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 8918( 3) - 01/14/02 10:47 - [ 8] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 130 NGC6681 STIS/F ACCUM F25SRF2 MIRROR 1 400 S MAX DUR 100% UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 8918( 3) - 01/14/02 10:47 - [ 9] Summary Form for Proposal 8918 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F25SRF2 F25QTZ F25CN182 25MAMA ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/NUV-MAMA STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category CAL/STIS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SCHED 100% BETWEEN 15-Sep-2001 AND 1-Oct-2001 MAX DUR 100% PATTERN 111 MAX DUR 100% SCHED 100% BETWEEN 18-FEB-2002 AND 04-MAR-2002 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC6681 ------------------------------------------------------------------------------------------------------------------------------------