Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5632 Report Date: 18-Jul-95:17:46 Version: ********** Check-in Date: ********** 1.Proposal Title: WF/PC2 CYCLE 4: Preflash 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 Analysis of Omega Cen calibration fields has revealed what appears to be a variation of ~10% across each CCD in the direction of the columns (parallel register). On the basis of analysis done by the WFPC2 Science Team and STScI we have established the following facts: 1) A variation of ~10% is seen in Omega Cen images across each chip in the direction of the columns (parallel register). 2) This effect is not removed by flat fielding, nor, does it appear to be intrinsic to the flat fields themselves. 3) It is also seen in analysis of cosmic ray events in long dark frames. 4) Pre-assembly engineering data does not appear to show the effect (John Trauger). ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 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 5632 PI: Mark Clampin Proposal Title: WF/PC2 CYCLE 4: Preflash Test ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Mark Clampin STSCI USA John Mackenty STSCI USA Sylvia Baggett STSCI USA ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. This proposal has two pieces. The first should run in Week 1: the F439W exposure will be preflashed to ~50-80e level and the F675W will be preflashed to the ~200e level. In Week 2, the F439W image will be preflashed to the higher (~200e) level and the F675W will be preflashed at the lower (~50-80e) level. Note that the remaining exposures (F336W,F555W,F814W) will not be preflashed. ------------------------------------------------------------------------------------ 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: JOHN MACKENTY Category: CI Institution: Address: 3700 San Martin Drive City: Baltimore State: MD Zip Code: 21218 Country: USA Telephone: (410) 338-4559 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 = 5632 [ 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 NGC6752 J,702 RA = 19H 10M 08.24S +/- 2000 1 V=14.5 0.1S, DEC = -59D 50' 25.3" +/- 1.0" Comments: NGC6752 IS THE ALTERNATE TARGET ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5632 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 12.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 8S 1 CYCLE 4 / 12.1-15 OMEGA1 F1042M READ=NO SEQ 12.1-15 WITHIN 7D SEQ 12.1-12.2 NON- INT SEQ 12.1-12.4 NO Comments: THIS IS PREFLASH FOR LINE 12.2, GAP F439W EXP MANUALLY CRSPLIT INTO TWO EXP, EACH PREFLASHED ------------------------------------------------------------------------------------------------------------------------------------ 12.2 DEF NGC6752 WFPC2 IMAGE WFALL F439W ATD-GAIN=15 1 40S 1 OMEGA1 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 12.3 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 8S 1 SEQ 12.3-12.4 NON- OMEGA1 F1042M READ=NO INT Comments: THIS IS PREFLASH FOR LINE 12.4 ------------------------------------------------------------------------------------------------------------------------------------ 12.4 DEF NGC6752 WFPC2 IMAGE WFALL F439W ATD-GAIN=15 1 40S 1 OMEGA1 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 13 DEF NGC6752 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA1 CR-SPLIT=DEF Comments: NO PREFLASH FOR F555W ------------------------------------------------------------------------------------------------------------------------------------ 14.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 26S 1 SEQ 14.1-14.2 NON- OMEGA1 F1042M READ=NO INT SEQ 14.1-14.4 NO GAP Comments: THIS IS PREFLASH FOR LINE 14.2 F675W EXP MANUALLY CRSPLIT INTO TWO EXP, EACH PREFLASHED ------------------------------------------------------------------------------------------------------------------------------------ 14.2 DEF NGC6752 WFPC2 IMAGE WFALL F675W ATD-GAIN=15 1 3S 1 OMEGA1 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 14.3 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 26S 1 SEQ 14.3-14.4 NON- OMEGA1 F1042M READ=NO INT Comments: THIS IS PREFLASH FOR LINE 14.3 ------------------------------------------------------------------------------------------------------------------------------------ 14.4 DEF NGC6752 WFPC2 IMAGE WFALL F675W ATD-GAIN=15 1 3S 1 OMEGA1 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 15 DEF NGC6752 WFPC2 IMAGE WFALL F814W ATD-GAIN=15 1 14S 1 OMEGA1 CR-SPLIT=DEF Comments: NO PREFLASH FOR F814W ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5632 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 22.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 26S 1 CYCLE 4 / 22.1-25 OMEGA2 F1042M READ=NO SEQ 22.1-25 WITHIN 7D SEQ 22.1-22.2 NON- INT SEQ 22.1-22.4 NO Comments: THIS IS PREFLASH FOR LINE 22.2 GAP F439W EXP MANUALLY CRSPLIT INTO TWO EXP, EACH PREFLASHED ------------------------------------------------------------------------------------------------------------------------------------ 22.2 DEF NGC6752 WFPC2 IMAGE WFALL F439W ATD-GAIN=15 1 40S 1 OMEGA2 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 22.3 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 26S 1 SEQ 22.3-22.4 NON- OMEGA2 F1042M READ=NO INT Comments: THIS IS PREFLASH FOR LINE 22.4 F439W EXP MANUALLY CRSPLIT INTO TWO EXP, EACH PREFLASHED ------------------------------------------------------------------------------------------------------------------------------------ 22.4 DEF NGC6752 WFPC2 IMAGE WFALL F439W ATD-GAIN=15 1 40S 1 OMEGA2 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 23 DEF NGC6752 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA2 CR-SPLIT=DEF Comments: NO PREFLASH FOR F555W ------------------------------------------------------------------------------------------------------------------------------------ 24.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 8S 1 SEQ 24.1-24.2 NON- OMEGA2 F1042M READ=NO INT SEQ 24.1-24.4 NO GAP Comments: THIS IS PREFLASH FOR LINE 24.2 F675W EXP MANUALLY CRSPLIT INTO TWO EXP, EACH PREFLASHED ------------------------------------------------------------------------------------------------------------------------------------ 24.2 DEF NGC6752 WFPC2 IMAGE WFALL F675W ATD-GAIN=15 1 3S 1 OMEGA2 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 24.3 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 8S 1 SEQ 24.3-24.4 NON- OMEGA2 F1042M READ=NO INT Comments: THIS IS PREFLASH FOR LINE 24.4 F675W EXP MANUALLY CRSPLIT INTO TWO EXP, EACH PREFLASHED ------------------------------------------------------------------------------------------------------------------------------------ 24.4 DEF NGC6752 WFPC2 IMAGE WFALL F675W ATD-GAIN=15 1 3S 1 OMEGA2 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 25 DEF NGC6752 WFPC2 IMAGE WFALL F814W ATD-GAIN=15 1 14S 1 OMEGA2 CR-SPLIT=DEF Comments: NO PREFLASH FOR F814W ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5632 [ 6] ------------------------------------------------------------------------------------------------------------------------------------ 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 USE CYCLE 4 / 101-102 OMEGA1 Comments: RUN FIRST SET ON SMS 108 BEFORE THE DECON ------------------------------------------------------------------------------------------------------------------------------------ 102 USE OMEGA2 Comments: RUN 2ND SET ON SMS 115 AFTER THE DECOn ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5632 [ 7] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN=15 READ=NO ATD-GAIN=15 CR-SPLIT=NO CR-SPLIT=DEF ------------------------------------------------------------------------------------------------------------------------------------ Proposal for CAL/WFC ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4 / 12.1-15; SEQ 12.1-15 WITHIN 7D; SEQ 12.1-12.2 NON-INT; SEQ 12.1-12.4 NO GAP SEQ 12.3-12.4 NON-INT SEQ 14.1-14.2 NON-INT; SEQ 14.1-14.4 NO GAP SEQ 14.3-14.4 NON-INT CYCLE 4 / 22.1-25; SEQ 22.1-25 WITHIN 7D; SEQ 22.1-22.2 NON-INT; SEQ 22.1-22.4 NO GAP SEQ 22.3-22.4 NON-INT SEQ 24.1-24.2 NON-INT; SEQ 24.1-24.4 NO GAP SEQ 24.3-24.4 NON-INT CYCLE 4 / 101-102 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F122M,F1042M F439W F555W F675W F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC6752 ------------------------------------------------------------------------------------------------------------------------------------