Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5645 Report Date: 18-Jul-95:17:48 Version: ********** Check-in Date: ********** 1.Proposal Title: WF/PC2 CYCLE 4: OPTIMUM PREFLASH TIME 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). This proposal will determine the proper - and minimum - preflash time required to compensate for the 10% variation. A series of F555W exposures will be taken, each preflashed at different levels. Set of 15 preflash times will span the range of ~5e- to 200e-. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 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 5645 PI: Mark Clampin Proposal Title: WF/PC2 CYCLE 4: OPTIMUM PREFLASH TIME TEST ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Mark Clampin STSCI USA Sylvia Baggett STSCI USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. These observations will be used to determine the preflash time required to remove the 10% photometric ramp. This is a contingency proposal and should be run only after request from 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 = 5645 [ 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 NGC5139 J,702 RA = 13H 25M 37.04S +/- 2000 1 V=14.5 0.1S, DEC = -47D 35' 38.3" +/- 1.0" Comments: NGC5139 IS THE PRIMARY TARGET ------------------------------------------------------------------------------------------------------------------------------------ 2 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 ALTERNATE TARGET IN THE EVENT OMEGA CEN CAN NOT BE USED ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5645 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 1 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 CYCLE 4 / 1.0-15.2 OMEGA CR-SPLIT=NO SEQ 1.0-15.2 WITHIN 7D Comments: UNPREFLASHED EXPOSURE ------------------------------------------------------------------------------------------------------------------------------------ 1.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 0.6S 1 CYCLE 4 / 1.1-15.2 OMEGA F1042M READ=NO SEQ 1.1-15.2 CR-SPLIT=NO WITHIN 7D SEQ 1.1-1.2 NON- INT Comments: THIS IS PREFLASH FOR LINE 1.2 ------------------------------------------------------------------------------------------------------------------------------------ 1.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 2.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 1.8S 1 SEQ 2.1-2.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 2.2 ------------------------------------------------------------------------------------------------------------------------------------ 2.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 3.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 3.0S 1 SEQ 3.1-3.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 3.2 ------------------------------------------------------------------------------------------------------------------------------------ 3.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 4.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 4.0S 1 SEQ 4.1-4.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 4.2 ------------------------------------------------------------------------------------------------------------------------------------ 4.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 5.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 5.0S 1 SEQ 5.1-5.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 5.2 ------------------------------------------------------------------------------------------------------------------------------------ 5.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 6.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 6.0S 1 SEQ 6.1-6.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 6.2 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5645 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 6.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 7.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 7.0S 1 SEQ 7.1-7.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 7.2 ------------------------------------------------------------------------------------------------------------------------------------ 7.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 8.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 8.0S 1 SEQ 8.1-8.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 8.2 ------------------------------------------------------------------------------------------------------------------------------------ 8.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 9.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 10.0S 1 SEQ 9.1-9.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 9.2 ------------------------------------------------------------------------------------------------------------------------------------ 9.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 10.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 12.0S 1 SEQ 10.1-10.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 10.2 ------------------------------------------------------------------------------------------------------------------------------------ 10.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 11.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 14.0S 1 SEQ 11.1-11.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 11.2 ------------------------------------------------------------------------------------------------------------------------------------ 11.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 12.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 16.0S 1 SEQ 12.1-12.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 12.2 ------------------------------------------------------------------------------------------------------------------------------------ 12.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5645 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 13.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 18.0S 1 SEQ 13.1-13.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 13.2 ------------------------------------------------------------------------------------------------------------------------------------ 13.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 14.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 20.0S 1 SEQ 14.1-14.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 14.2 ------------------------------------------------------------------------------------------------------------------------------------ 14.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 15.1 DEF INTFLAT WFPC2 IMAGE WFALL F122M, ATD-GAIN=15 1 23S 1 SEQ 15.1-15.2 NON- OMEGA F1042M READ=NO INT CR-SPLIT=NO Comments: THIS IS PREFLASH FOR LINE 15.2 ------------------------------------------------------------------------------------------------------------------------------------ 15.2 DEF NGC5139 WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 12S 1 OMEGA CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 100 USE CYCLE 4 / 100.000 OMEGA Comments: RUN SEQUENCE ONLY UPON REQUEST OF PI ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5645 [ 7] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN=15 CR-SPLIT=NO ATD-GAIN=15 READ=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal for CAL/WFC ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4 / 1.0-15.2 ; SEQ 1.0-15.2 WITHIN 7D; CYCLE 4 / 1.1-15.2 ; SEQ 1.1-15.2 WITHIN 7D; SEQ 1.1-1.2 NON-INT SEQ 2.1-2.2 NON-INT SEQ 3.1-3.2 NON-INT SEQ 4.1-4.2 NON-INT SEQ 5.1-5.2 NON-INT SEQ 6.1-6.2 NON-INT SEQ 7.1-7.2 NON-INT SEQ 8.1-8.2 NON-INT SEQ 9.1-9.2 NON-INT SEQ 10.1-10.2 NON-INT SEQ 11.1-11.2 NON-INT SEQ 12.1-12.2 NON-INT SEQ 13.1-13.2 NON-INT SEQ 14.1-14.2 NON-INT SEQ 15.1-15.2 NON-INT CYCLE 4 / 100.000 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F555W F122M,F1042M ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC5139 NGC6752 ------------------------------------------------------------------------------------------------------------------------------------