Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 2187c Report Date: 09-May-96:16:56 Version: ********** Check-in Date: ********** 1.Proposal Title: FOS-OV 61/71 COARSE Y-BASE MEASUREMENTS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID OV/FOS Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Richard Harms APPLIED RESEARCH CORPORATION USA (301) 459-8442 ------------------------------------------------------------------------------------ 7. Abstract The TA-LED is used to determine, with very fine steps, the coarse position on the photocathode of MIRROR. Assuming the ground-based value is close, the y-base for the G190H grating, used in subsequent tests, is determined using the Pt-Ne lamp. These observations are perform with both detectors. This program has a high priority compared with other OV activities. This program will result in a data base change to the table of y-bases. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 0 par: 0.06 10. Num targs pri: 0 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: FOS ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 2187c PI: Richard Harms Proposal Title: FOS-OV 61/71 COARSE Y-BASE MEASUREMENTS ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Roger Angel UNIVERSITY OF ARIZONA USA Bruce Margon UNIVERSITY OF WASHINGTON USA Frank Bartko APPLIED RESEARCH CORPORATON USA Arthur Davidsen JOHNS HOPKINS UNIVERSITY USA Richard Harms APPLIED RESEARCH CORPORATON USA Ralph Bohlin SPACE TELESCOPE SCIENCE USA INSTITUTE E. M. Burbidge UNIVERSITY OF CALIFORNIA, SAN USA DIEGO Edward Beaver UNIVERSITY OF CALIFORNIA, SAN USA DIEGO Holland Ford STSCI USA ------------------------------------------------------------------------------------ 2. Scientific Justification. Measurements of the internal TA-LED and Pt-Ne lamp, obtained when other SIs are prime, will allow us to determine the location of spectra for selected aperture/disperser combinations. This is the first set of on-orbit y-scanned illuminations, which will allow us to roughly locate the images from the various apertures and optical elements on each detector photocathode. Comparison with prelaunch calibration data will check for major deviations in these positions. A repetition of the full set of y-scans with finer y-spatial resolution (in later SV tests) will allow us to derive exact tables of y-deflection values for use in all normal operations. ------------------------------------------------------------------------------------ 3. Description of proposed observations. In this test, we will obtain data on the internal TA-LED and Pt-Ne lamps. Data will be obtained through the 0.5-PAIR and 0.5" apertures for grating G190H and the MIRROR, respectively. The MIRROR observation is with very fine y-steps to be certain the y-base is found. The G190H observations assumes the ground-based value is close, and is thus performed with a more restriction y-range. The calibration of this grating is critical to subsequent proposals. Although we are using the IMAGE mode, the data actually consists of n individual spectra, where n is the number of y-steps. We will need to look at the individual spectra in each IMAGE, unlike a typical target acquisition IMAGE. Also, we will need to read all 512 channels, rather than the smaller number (~20) typically read for a target acquisition IMAGE. If the individual spectra cannot be viewed, then we will need to change from IMAGE mode to ACCUM mode. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. Not applicable. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. All observations are parallel. These observations should be performed 90 minutes after the slow high voltage increase programs (FOS060/070, Prop=2163). The Focus and X-pitch program (FOS615/715, Prop=2189) is to be performed 4 days after this program, with the y-bases determine here inserted into the PDB during the 4 day wait. Page 3 ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. This test is not stray light sensitive. All observations are internal Pt-Ne lamp and TA-LED measurements. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. Data reduction will be performed at the ST ScI, and the analysis will be performed using FOS IDT computer facilities. This is a verification of ground- based analysis, so no data will need to be added to the PODPS pipeline. However, this program will determine the correct y-deflections to be used in obtaining data, and this information will need to be updated after any change in position is measured. ------------------------------------------------------------------------------------ 9. Description of previous HST work. Not applicable. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). Data analysis, research assistant support, and funding will be provided under NASA's FOS development contract NAS 5-24463. ------------------------------------------------------------------------------------ 11. Address Information Name: RICHARD HARMS Category: PI Institution: APPLIED RESEARCH CORPORATION Address: City: State: Zip Code: Country: USA Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 2187c [ 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 DEFINE TALED FOS/BL IMAGE 0.5 MIRROR SUB-STEP=1 1 128S 1 SEQ 1-2 NO GAP Y-MAPB3 Y-SIZE=128 COMB=NO Y-SPACE=32.0 Y=0 ------------------------------------------------------------------------------------------------------------------------------------ 2 ^ WAVE ^ ^ 0.5- G190H SUB-STEP=1 ^ 24S 1 PAIR-B Y-SIZE=24 COMB=NO Comments: THIS SEQUENCE IS A COARSE MAPPING OF THE BLUE PHOTOCATHODE, USING ONE OF EACH TYPE OF APERTURE. THIS SEQUENCE YIELDS THE OFFSETS FROM GROUND BASE Y-BASES. ------------------------------------------------------------------------------------------------------------------------------------ 3 DEFINE TALED FOS/RD IMAGE 0.5 MIRROR SUB-STEP=1 1 128S 1 SEQ 3-4 NO GAP Y-MAPR3 Y-SIZE=128 COMB=NO Y-SPACE=32.0 Y=0 ------------------------------------------------------------------------------------------------------------------------------------ 4 ^ WAVE ^ ^ 0.5- G190H SUB-STEP=1 ^ 24S 1 PAIR-B Y-SIZE=24 COMB=NO Comments: THIS SEQUENCE IS A COARSE MAPPING OF THE RED PHOTOCATHODE , USING ONE OF EACH TYPE OF APERTURE. THIS SEQUENCE YIELDS THE OFFSETS FROM GROUND BASE Y- BASES. ------------------------------------------------------------------------------------------------------------------------------------ 5 USE Y- PARALLEL MAPB3 ------------------------------------------------------------------------------------------------------------------------------------ 6 USE Y- PARALLEL MAPR3 Comments: THE COARSE Y-BASE POSITIONS. ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 2187c [ 5] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/BL ^ FOS/RD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ^ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SUB-STEP=1 Y-SIZE=128 COMB=NO Y-SPACE=32.0 Y=0 Y-SIZE=24 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for OV/FOS ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SEQ 1-2 NO GAP; SEQ 3-4 NO GAP; PARALLEL; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G190H ------------------------------------------------------------------------------------------------------------------------------------ Target Names ------------------------------------------------------------------------------------------------------------------------------------