Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 1428c Report Date: 09-May-96:16:40 Version: ********** Check-in Date: ********** 1.Proposal Title: FOS-V4 TARGET ACQUISITION - BLIND OFFSET ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID SV/FOS Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Dr. Holland Ford SPACE TELESCOPE SCIENCE INST USA 301-338-4803 ------------------------------------------------------------------------------------ 7. Abstract A test will be performed to verify the point souce target acquisition software of the FOS, as well as the blind offset mode. The test will first image a star of a close (separation 15") double in the large aperture, and then allow the binary search onboard software to determine the centering for that object. A blind offset will then be performed to the second star of the pair, and a camera image obtained to verify the centering. The test will be repeated once to test for repeatability. This program (along with the other target acquisition tests) is the highest priority SV activity to be performed. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 0 par: 0 10. Num targs pri: 2 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: FOS ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 1428c PI: Dr. Holland Ford Proposal Title: FOS-V4 TARGET ACQUISITION - BLIND OFFSET ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Roger Angel UNIVERSITY OF ARIZONA USA Bruce Margon UNIVERSITY OF WASHINGTON USA Frank Bartko MARTIN MARIETTA CORPORATION USA Arthur Davidsen JOHNS HOPKINS UNIVERSITY USA Richard Harms APPLIED RESEARCH CORPORATION 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 Dr. Holland Ford SPACE TELESCOPE SCIENCE USA INSTITUTE ------------------------------------------------------------------------------------ 2. Scientific Justification. Target acquisition is THE most important task to be verified in SV. The blind offset technique will probably not be used very frequently, but still needs to be tested. This test is to be performed a total of two times. This repetition will allow us to estimate the centering errors for this mode, which will, in turn, give us information on the accuracy of FOS photometry, as well as the accuracy for radial velocity measurements. ------------------------------------------------------------------------------------ 3. Description of proposed observations. In this test, we will observe one (1) close pair of stars to verify the functionality of the binary search target acquisition software of the FOS, as well as the blind offset capability. We will observe the object in the camera mode to check on its initial position, then let the software determine the centering of the object. We will then perform a blind offset to the second member of the pair, and take a camera image to check on its centering. CONTINUATION OF COMMENT FROM EXP. LOG. LINE 2: first SAM centers the offset star in the 4.3" aperture, and is FOS created. The second SAM is a blind pointing to the primary object, and is DF-224 controlled. The DF-224 also controls the move to the science aperture. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. Not applicable. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. Note that programs V3 (Prop 1427) and this program have the same targets. These programs should be scheduled consecutively, if most efficient. SV prerequisites: Verification of mode II binary search target acquisition mode (Prop 2195). Minimum/Delta Plan objects: all observations are minimum plan This program may be done in PCS coarse track, if necessary. Pointing stability of 10% of the smallest aperture used (1.0") - 0.10" - is required. ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. This test is not stray light sensitive. Page 3 ------------------------------------------------------------------------------------ 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. Since this test is strictly a verification, no pipeline calibration data will be obtained. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). Data analysis, research assistant support, and funding will be provided under NASA's FOS GTO contract(s). ------------------------------------------------------------------------------------ 11. Address Information Name: HOLLAND FORD Category: PI Institution: SPACE TELESCOPE SCIENCE INSTITUTE Address: HOMEWOOD CAMPUS City: BALTIMORE State: MD Zip Code: 21218 Country: USA Telephone: 301-338-4803 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 1428c [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 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 NGC-188-167 STAR 167 IN NGC 188 RA = 00H 27M 06.50S +/- 1950 1 V=15.08 +/- 0.05 0.01S, 2 B=15.86 +/- 0.05 DEC = +84D 54' 57.9" +/- 0.3" Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J 1950.00 -0.0003 +/- 0.0001 -0.0087 +/- 0.0013 0.0000 +/- 0.0000 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-188-167A COMPANION STAR OF RA-OFF = -6.601S +/- 0.1S, 1 V=15.17 +/- 0.5 NGC 188, STAR 167 DEC-OFF = -8.63" +/- 0.1", 2 B=15.62 +/- 0.5 FROM 1 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 1428c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 2 DEFINE # # ACQ # MIRROR 1 1.4S 1 1 IMAGE Comments: BLIND OFFSET, BRIGHT STAR. NOTE THAT 2 SAMS ARE REQUIRED TO GO FROM THE INITIAL POSITION OF THE OFFSET STAR (EXP 1) TO THE CENTERED PRIMARY OBJECT (EXP 2). THE (SEE GF, Q3 FOR CONTINUATION) ------------------------------------------------------------------------------------------------------------------------------------ 3 USE NGC-188-167 FOS/BL 4.3 X5 SEQ 3-5 NO GAP IMAGE CYCLE 0/3-8 ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-188-167 FOS/BL ACQ/ 4.3 MIRROR BRIGHT=330000 1 17.0S 1 1 ONBOARD ACQ FOR BINARY 4.5-5 ------------------------------------------------------------------------------------------------------------------------------------ 4.5 USE NGC-188-167 FOS/BL 4.3 X5 IMAGE ------------------------------------------------------------------------------------------------------------------------------------ 5 USE NGC-188- FOS/BL 1.0 X12 REPEAT 3-5 EVERY IMAGE 167A 14D +/- 7D FOR 1 MORE TIME ------------------------------------------------------------------------------------------------------------------------------------ 6 USE NGC-188-167 FOS/RD 4.3 X5 SEQ 6-8 NO GAP IMAGE ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC-188-167 FOS/RD ACQ/ 4.3 MIRROR BRIGHT=330000 1 12S 1 1 ONBOARD ACQ FOR BINARY 7.5-8 ------------------------------------------------------------------------------------------------------------------------------------ 7.5 USE NGC-188-167 FOS/RD 4.3 X5 IMAGE ------------------------------------------------------------------------------------------------------------------------------------ 8 USE NGC-188- FOS/RD 1.0 X12 REPEAT 6-8 EVERY IMAGE 167A 14D +/- 7D FOR 1 MORE TIME ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 1428c [ 6] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations # FOS/BL FOS/RD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACQ/BINARY ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BRIGHT=330000 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for SV/FOS ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SEQ 3-5 NO GAP; CYCLE 0/3-8; ONBOARD ACQ FOR 4.5-5; REPEAT 3-5 EVERY 14D +/- 7D FOR 1 MORE TIME; SEQ 6-8 NO GAP; ONBOARD ACQ FOR 7.5-8; REPEAT 6-8 EVERY 14D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC-188-167 NGC-188-167A ------------------------------------------------------------------------------------------------------------------------------------