Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5646 Report Date: 18-Jul-95:17:48 Version: ********** Check-in Date: ********** 1.Proposal Title: WF/PC2 CYCLE 4 CAL: CTE DITHER TEST ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID CAL/WFC Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Mark Clampin STSCI USA (410) 338-4711 ------------------------------------------------------------------------------------ 7. Abstract Previous photometric analysis of the Omega Cen field has revealed an apparent 10% ramp across each CCD in the direction of the columns (parallel register). Flatfielding does not remove the effect nor does it appear to be intrinsic to the flatfields; it is also seen in cosmic ray analysis of long dark frames. The purpose of this proposal is to quantify the effect in an efficient manner by obtaining five images (each offset slightly from the previous one) of the Omega Cen photometric field along the WFPC2 X direction and four images along the Y direction, again each image offset somewhat from the previous ones. The pointings, specified with postargs, will be arranged to ensure the maximum starfield overlap. The F555W filter is used along with the exposure times from the IDT's SMOV dither test, which will facilitate direct comparisons with the earlier data. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 0 par: 0 10. Num targs pri: 0 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: WF/PC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5646 PI: Mark Clampin Proposal Title: WF/PC2 CYCLE 4 CAL: CTE DITHER TEST ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Mark Clampin STSCI USA Sylvia Baggett STSCI USA ------------------------------------------------------------------------------------ 2. Scientific Justification. These calibration tests are required to characterize the 10% ramp effect seen in the Y direction. ------------------------------------------------------------------------------------ 3. Description of proposed observations. Two sets of F555W images will be obtained: one set will run along the WFPC2 Y direction and one set along the WFPC X direction. Each image will be slightly offset from the others; the pattern of the pointings is in the shape of a '+'. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. The first "USE" should be scheduled to run once as soon as possible. Note that additional repeats have been included in the event that further tests are required; they should only be run if requested by PI. ------------------------------------------------------------------------------------ 11. Address Information Name: MARK CLAMPIN Category: PI Institution: Address: 3700 San Martin Drive City: Baltimore State: MD Zip Code: 21218 Country: USA Telephone: (410) 338-4711 Telex (or e-mail): ------------------------------------------------------------------------------------ Name: SYLVIA M BAGGETT Category: CI Institution: Address: 3700 San Martin Drive City: Baltimore State: MD Zip Code: 21218 Country: USA Telephone: (410) 338-5054 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5646 [ 3] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial |Acqui|FLX| Flux data No | Name | Description | Position |Eqnx | Vel. |Prblm|REF| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 1 OMEGA-CEN J,702 RA = 13H 25M 37.04S +/- 2000 1 V=14.5 0.1S, DEC = -47D 35' 38.3" +/- 1.0" ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC6752 J,702 RA = 19H 10M 08.24S +/- 2000 1 V=14.5 0.1S, DEC = -59D 50' 25.3" +/- 1.0" Comments: ALTERNATE TARGET IN THE EVENT THAT OMEGA -CEN IS UNAVAILABLE ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5646 [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 101 DEF OMEGA-CEN WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 40S 1 CYCLE 4/ 101-109 OMEGA CR-SPLIT=NO SAME ORIENT FOR 102-109 AS 101 Comments: SAME GUIDE STARS FOR 102-109 AS 101; CENTER OF PATTERN (NO POSTARG) ------------------------------------------------------------------------------------------------------------------------------------ 102 DEF OMEGA-CEN WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 40S 1 POS TARG +15, 0 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 103 DEF OMEGA-CEN WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 40S 1 POS TARG +30, 0 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 104 DEF OMEGA-CEN WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 40S 1 POS TARG -15, 0 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 105 DEF OMEGA-CEN WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 40S 1 POS TARG -30, 0 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 106 DEF OMEGA-CEN WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 40S 1 POS TARG 0, +15 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 107 DEF OMEGA-CEN WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 40S 1 POS TARG 0, +30 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 108 DEF OMEGA-CEN WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 40S 1 POS TARG 0, -15 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 109 DEF OMEGA-CEN WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 40S 1 POS TARG 0, -30 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 501 USE CYCLE 4/ 501-505 OMEGA Comments: RUN SEQUENCE ONCE ASAP ------------------------------------------------------------------------------------------------------------------------------------ 502 USE OMEGA Comments: CONTINGENCY USE: TO BE INVOKED ONLY AT REQUEST OF PI ------------------------------------------------------------------------------------------------------------------------------------ 503 USE OMEGA Comments: CONTINGENCY USE: TO BE INVOKED ONLY AT REQUEST OF PI ------------------------------------------------------------------------------------------------------------------------------------ 504 USE OMEGA Comments: CONTINGENCY USE: TO BE INVOKED ONLY AT REQUEST OF PI ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5646 [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 505 USE OMEGA Comments: CONTINGENCY USE: TO BE INVOKED ONLY AT REQUEST OF PI ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5646 [ 6] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal for CAL/WFC ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4/ 101-109; SAME ORIENT FOR 102-109 AS 101; POS TARG +15, 0 POS TARG +30, 0 POS TARG -15, 0 POS TARG -30, 0 POS TARG 0, +15 POS TARG 0, +30 POS TARG 0, -15 POS TARG 0, -30 CYCLE 4/ 501-505 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F555W ------------------------------------------------------------------------------------------------------------------------------------ Target Names OMEGA-CEN NGC6752 ------------------------------------------------------------------------------------------------------------------------------------