Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 4114c Report Date: 09-May-96:19:13 Version: ********** Check-in Date: ********** 1.Proposal Title: GHRS SSA A2 SPIRAL - FINE ALIGNMENT ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID CAL/HRS 4114 Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Ronald L. Gilliland SPACE TELESCOPE SCIENCE INST USA 410-338-4454 ------------------------------------------------------------------------------------ 7. Abstract The highest priority augmentation of flight software in support of GHRS for build 4.0 is capability of return to brightest point of an SSA spiral search. This will allow a true flux peakup in the SSA, a sorely missed capability currently. The initial SSA Spiral Search Test (3999) suggested an error of about 0.16 arcsec in LSA to SSA PDB values. This test will provide confirmation of current alignment uncertainties for mirror A2. This may allow improvements in upcoming A2-SSA observations before the optimal solution (return to brightest) is available. This test replaces, and should be an improvement upon, Prop. 2839 HRS/FGS Fine Alignment. ------------------------------------------------------------------------------------ 8. Scientific Key Words: CALIBRATION SPECTROSCOPY, UV ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 1.39 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 4114c PI: Ronald L. Gilliland Proposal Title: GHRS SSA A2 SPIRAL - FINE ALIGNMENT ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Ronald Gilliland STSCI USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. Exp log lines 1-134 describe the "brute force" SSA spiral starting at the nominal 0,0 aperture position and stepping out at 0.125" increments. Measurements are also taken at the 2 other positions - 1 at the expected best location and another bracketing the other side of that position. Measurements are again obtained at the nominal center and in the LSA. After return to the LSA in line 134.00, another ACQ/PEAKUP is performed to accurately recenter in the LSA prior to another offset to the SSA. We then run through a 3x3 spatial scan which is being considered as a workaround for SSA precise pointing until return to brightest is available. Prior to running this for GO programs, a verification of the is desired. These observations are described in lines 135,136. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. Minimal ACCUM mode exposures are more than adequate to define a high quality spiral flux "map" for G160M. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. Data will be analysed at the ST ScI using fully developed and tested software. ------------------------------------------------------------------------------------ 13. Flux measurements will be obtained at a grid of positions near nominal best pointing with the SSA, using a dispersing element. This will be used to verify a possible change of aperture locations for the PDB. ------------------------------------------------------------------------------------ 11. Address Information Name: RONALD L. GILLILAND Category: PI Institution: SPACE TELESCOPE SCIENCE INSTITUTE Address: City: State: Zip Code: Country: Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 4114c [ 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 HD141556 CHI J,707 RA=15H 47M 46.468S +/- 0.2", 1950 V=+5 1 V=3.95+/-.05, TYPE=BP -LUP DEC=-33D 28' 35.36" +/- 0.2" 2 F-CONT(1362)=1.8 E-10 3 F-CONT(1868)=1.9 E-10 4 F-CONT(2682)=1.0 E-10 Comments: BP HG MN STAR Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 1950.00 -0.0006 +/- 0.0007 -0.0320 +/- 0.0100 0.0000 +/- 0.0000 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 4114c [ 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 HD141556 HRS ACQ 2.0 MIRROR-A2 SEARCH-SIZE=5 1 5.0S 10 1 1 ONBOARD ACQ FOR FAINT=1900 1.001 Comments: STEP-TIME=0.2 SEC ------------------------------------------------------------------------------------------------------------------------------------ 1.001 HD141556 HRS ACQ/ 2.0 MIRROR-A2 1 73.6S 10 1 1 ONBOARD ACQ FOR PEAKUP 1.002-134.000 Comments: STEP-TIME=1.6 SEC ------------------------------------------------------------------------------------------------------------------------------------ 1.002 HD141556 HRS IMAGE 2.0 MIRROR-A2 NX=32 1 102.4S 10 4 1 NY=16 DELTA-X=2 DELTA-Y=4 ------------------------------------------------------------------------------------------------------------------------------------ 3 HD141556 HRS ACCUM 2.0 G160M 1868 STEP-PATT=4 1 14.4S 100 3 1 CYCLE 1 / 1.000- 136.000 SEQ 3-136 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 12 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 Comments: SPECIAL CMDING: PLEASE SUPPRESS ALL DEFCALS,SPYBALS IN REMAINDER OF PROPOSAL LINES 22- 134; ------------------------------------------------------------------------------------------------------------------------------------ 22 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 POS TARG -0.125, 0.0 / 22 ------------------------------------------------------------------------------------------------------------------------------------ 32 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 POS TARG -0.125, 0.125 / 32 ------------------------------------------------------------------------------------------------------------------------------------ 42 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 POS TARG 0.0,0.125 / 42 ------------------------------------------------------------------------------------------------------------------------------------ 52 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 POS TARG 0.125, 0.125 / 52 ------------------------------------------------------------------------------------------------------------------------------------ 62 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 POS TARG 0.125,0.0 / 62 ------------------------------------------------------------------------------------------------------------------------------------ 72 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 POS TARG 0.125,- 0.125 / 72 ------------------------------------------------------------------------------------------------------------------------------------ 82 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 POS TARG 0.0,- 0.125 / 82 ------------------------------------------------------------------------------------------------------------------------------------ 92 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 POS TARG -0.125,- 0.125 / 92 ------------------------------------------------------------------------------------------------------------------------------------ 102 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 POS TARG 0.0,-0.25 / 102 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 4114c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 112 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 POS TARG -0.05,- 0.163 / 112 Comments: NOMINAL BEST POINTING FROM SPIRAL SEARCH TEST ------------------------------------------------------------------------------------------------------------------------------------ 122 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 POS TARG 0.0,0.0 / 122 ------------------------------------------------------------------------------------------------------------------------------------ 134 HD141556 HRS IMAGE 2.0 MIRROR-A2 NX=32 1 102.4S 10 4 1 NY=16 DELTA-X=2 DELTA-Y=4 ------------------------------------------------------------------------------------------------------------------------------------ 135 HD141556 HRS ACQ/ 2.0 MIRROR-A2 1 73.6S 10 1 1 ONBOARD ACQ FOR PEAKUP 136 Comments: STEP-TIME=1.6 SEC ------------------------------------------------------------------------------------------------------------------------------------ 136 HD141556 HRS ACCUM 0.25 G160M 1868 STEP-PATT=4 1 14.4S 100 4 1 SPATIAL SCAN SINGLE-EXP ------------------------------------------------------------------------------------------------------------------------------------ Scan Paramters Form Proposal ID: 4114c [ 6] ------------------------------------------------------------------------------------------------------------------------------------ Data ID: 1 Exposure Logsheet lines: 136.00 FGS Scan: DWELL Dwell Only: dwell points/line: 3 Seconds per dwell: 14.40 Scan width (arc-secs): 0.2500 Scan length (arc-secs): 0.2500 Angle between sides (degrees) 90.00 Number of lines: 3 Scan rate (arc-sec/sec): 0.0000 PA of first scan line (degrees) 0.000 Scan frame (CEL or S/C): S/C Length Offset (arc-sec): 0.1250 Width Offset (arc-sec): 0.1250 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 4114c [ 7] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations HRS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACQ/PEAKUP IMAGE ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SEARCH-SIZE=5 FAINT=1900 NX=32 NY=16 DELTA-X=2 DELTA-Y=4 STEP-PATT=4 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for CAL/HRS ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 1.39 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 1.001; ONBOARD ACQ FOR 1.002-134.000; CYCLE 1 / 1.000-136.000; SEQ 3-136 NO GAP POS TARG -0.125,0.0 / 22 POS TARG -0.125,0.125 / 32 POS TARG 0.0,0.125 / 42 POS TARG 0.125,0.125 / 52 POS TARG 0.125,0.0 / 62 POS TARG 0.125,-0.125 / 72 POS TARG 0.0,-0.125 / 82 POS TARG -0.125,-0.125 / 92 POS TARG 0.0,-0.25 / 102 POS TARG -0.05,-0.163 / 112 POS TARG 0.0,0.0 / 122 ONBOARD ACQ FOR 136; SPATIAL SCAN SINGLE-EXP; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR-A2 G160M ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD141556 CHI-LUP ------------------------------------------------------------------------------------------------------------------------------------