Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5669 Report Date: 18-Jul-95:17:50 Version: ********** Check-in Date: ********** 1.Proposal Title: FOC FLAT-FIELD LINEARITY ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID CAL/FOC Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Dr. Perry Greenfield SPACE TELESCOPE SCIENCE INST USA ------------------------------------------------------------------------------------ 7. Abstract Nonlinearity of count rate an important instrumental characteristic of the FOC and affects many of its observations. The Intensity Transfer Function for flat fields was well studied in two SV calibration programs. Nevertheless, it has been over three years and it is quite possible that the ITF curves have changed significantly in that time. Since these ITF curves form the basis for virtually all our methods of determining the amount of nonlinearity (even for point sources) it is important to verify that there have been significant changes. The original SV proposals covered 4 different formats; this proposal will use only two formats: the 512x512 and the 512 zoomed x 1024 formats. Like the SV proposals, the ITF is measured by taking exposures using the onboard LEDs at increasing levels of illumination. All observations are to be carried out in parallel mode. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 0 par: 0 10. Num targs pri: 0 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: FOC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5669 PI: Dr. Perry Greenfield Proposal Title: FOC FLAT-FIELD LINEARITY ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Dr. Perry Greenfield SPACE TELESCOPE SCIENCE USA INSTITUTE ------------------------------------------------------------------------------------ 3. Description of proposed observations. Sequences of images are taken using the internal LED as a flat field source at a variety of different intensity levels to cover both the linear and saturated parts of the intensity transfer function. As the calibration of the LED intensity is accurately known, the linearity of the detector can be determined. This sequence of images will comprise 6-9 LED exposures at different levels, and will have to be repeated for 2 different camera formats because linearity is format dependent. ------------------------------------------------------------------------------------ 11. Address Information Name: PERRY GREENFIELD Category: PI Institution: SPACE TELESCOPE SCIENCE INSTITUTE Address: 3700 SAN MARTIN DRIVE City: BALTIMORE State: MD Zip Code: 21218 Country: USA Telephone: 301-338-4426 Telex (or e-mail): 684-9101-STSCI ------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5669 [ 3] ------------------------------------------------------------------------------------------------------------------------------------ 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 INTFLAT FOC/96 RESEAU 512X512 CLEAR LED=GREEN-2 1 500S 9 CYCLE 4 / 1-18 LED-STEP=255 GROUP 1-11 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 2 INTFLAT FOC/96 RESEAU 512X512 CLEAR LED=GREEN-2 1 500S 9 LED-STEP=192 ------------------------------------------------------------------------------------------------------------------------------------ 3 INTFLAT FOC/96 RESEAU 512X512 CLEAR LED=GREEN-2 1 500S 9 LED-STEP=128 ------------------------------------------------------------------------------------------------------------------------------------ 4 INTFLAT FOC/96 RESEAU 512X512 CLEAR LED=GREEN-2 1 500S 9 LED-STEP=64 ------------------------------------------------------------------------------------------------------------------------------------ 5 INTFLAT FOC/96 RESEAU 512X512 CLEAR LED=GREEN-2 1 500S 9 LED-STEP=32 ------------------------------------------------------------------------------------------------------------------------------------ 6 INTFLAT FOC/96 RESEAU 512X512 CLEAR LED=GREEN-2 1 500S 9 LED-STEP=10 ------------------------------------------------------------------------------------------------------------------------------------ 7 INTFLAT FOC/96 RESEAU 512X512 CLEAR LED=GREEN-2 1 500S 9 LED-STEP=5 ------------------------------------------------------------------------------------------------------------------------------------ 8 INTFLAT FOC/96 RESEAU 512X512 CLEAR LED=BLUE 1 500S 1 LED-STEP=192 ------------------------------------------------------------------------------------------------------------------------------------ 9 INTFLAT FOC/96 RESEAU 512X512 CLEAR LED=BLUE 1 500S 1 LED-STEP=128 ------------------------------------------------------------------------------------------------------------------------------------ 10 INTFLAT FOC/96 RESEAU 512X512 CLEAR LED=BLUE 1 500S 1 LED-STEP=64 ------------------------------------------------------------------------------------------------------------------------------------ 11 INTFLAT FOC/96 RESEAU 512X512 CLEAR LED=BLUE 1 500S 1 LED-STEP=32 ------------------------------------------------------------------------------------------------------------------------------------ 12 INTFLAT FOC/96 RESEAU 512X102 CLEAR PIXEL=50X25 1 500S 1 GROUP 12-18 NO GAP 4 LED=GREEN-2 LED-STEP=128 ------------------------------------------------------------------------------------------------------------------------------------ 13 INTFLAT FOC/96 RESEAU 512X102 CLEAR PIXEL=50X25 1 500S 1 4 LED=GREEN-2 LED-STEP=64 ------------------------------------------------------------------------------------------------------------------------------------ 14 INTFLAT FOC/96 RESEAU 512X102 CLEAR PIXEL=50X25 1 500S 1 4 LED=GREEN-2 LED-STEP=32 ------------------------------------------------------------------------------------------------------------------------------------ 15 INTFLAT FOC/96 RESEAU 512X102 CLEAR PIXEL=50X25 1 500S 1 4 LED=GREEN-2 LED-STEP=16 ------------------------------------------------------------------------------------------------------------------------------------ 16 INTFLAT FOC/96 RESEAU 512X102 CLEAR PIXEL=50X25 1 500S 1 4 LED=GREEN-2 LED-STEP=8 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5669 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 17 INTFLAT FOC/96 RESEAU 512X102 CLEAR PIXEL=50X25 1 500S 1 4 LED=GREEN-2 LED-STEP=4 ------------------------------------------------------------------------------------------------------------------------------------ 18 INTFLAT FOC/96 RESEAU 512X102 CLEAR PIXEL=50X25 1 500S 1 4 LED=GREEN-2 LED-STEP=2 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5669 [ 5] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOC/96 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes RESEAU ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters LED=GREEN-2 LED-STEP=255 LED-STEP=192 LED-STEP=128 LED-STEP=64 LED-STEP=32 LED-STEP=10 LED-STEP=5 LED=BLUE PIXEL=50X25 LED-STEP=16 LED-STEP=8 LED-STEP=4 LED-STEP=2 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for CAL/FOC ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4 / 1-18; GROUP 1-11 NO GAP GROUP 12-18 NO GAP; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements CLEAR ------------------------------------------------------------------------------------------------------------------------------------ Target Names ------------------------------------------------------------------------------------------------------------------------------------