Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 4151c Report Date: 09-May-96:19:18 Version: ********** Check-in Date: ********** 1.Proposal Title: MONITOR LONG-TERM STABILITY OF THE FGS'S EXTENSION ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID SV/AST 1418 Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone William H. Jefferys UNIVERSITY OF TEXAS USA 512-471-1455 PROFESSOR ------------------------------------------------------------------------------------ 7. Abstract The goal of these measurements is to monitor the internal positional stability of the FGSs by measuring a few stars in "check fields" repeatedly during the SV period. The results of these measurements are the stability characteristics of the FGS to allow an estimate of the frequency of OFAD re-calibrations. NOW USES WvA positions for PROX and ref frame. 910920 Modified 910920 by F. Benedict to 1) observe Proxima Cen starting 920201 2) do either FGS 1 or FGS 3 THIS IS AN FGS 3 TEST Modified 8 Feb 92 to remove v=16.25 target and change pupil to F583W. Modified 4/14/92 add two stars + extension through August 1992 F. Benedict Data are acquired during each of two orbits on each date. This provides redundancy and space for internal test source observations. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 2.50 par: 0 10. Num targs pri: 5 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: FGS ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 4151c PI: William H. Jefferys Proposal Title: MONITOR LONG-TERM STABILITY OF THE FGS'S EXTENSION ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ William Jeffreys UNIV. OF TEXAS USA George Benedict UNIV. OF TEXAS USA Laurence Fredrick UNIV. OF VIRGINIA USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. 1) First obs on 7/6/92 +/- 2D (day 188) at 5/17/92 off-nominal roll 2) Second obs: Off nominal roll = +30D 3) Position HST to place the check field in FGS 3. Acquire guide stars. HST roll should be selected so that the same roll orientation can be used as long as possible. 4) Measure 9 stars in POS mode. The last star is the same as the first. 5) Repeat step 4) after 60 minutes (to force second obs set into next orbit). 6) Repeat steps 3-5 after 10 +/-1 days using the same roll orientation as in step 1. 7) Repeat steps 3-5 after 20 +/- 1 days using the same roll orientation as in step 1. 8) Repeat steps 3-5 after 33 +/- 1 days using the same roll orientation as in step 1. 9) Repeat steps 3-5 after 46 +/- 1 days using the same roll orientation as in step 1. 10) Repeat steps 3-5 after 51 +/- 1 days using the same roll orientation as in step 1. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. We need to monitor structural changes due to any effects. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. SV 1418 Extension The orientation established in lines 12 and 28 apply to Proxima Cen as target. Series of measurements at a fixed orientation must be made using a single target/SEQUENCE. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. ADRS with SDAS will be used to monitor intra FGS positional changes due to H2O desorption plus other (e.g. thermal) causes. The measurements will be fit to previous measurements and a frequency of recalibration of the FGS geometries established. Special parameters will not be generated or required, but the raw data and final coefficients should be readily available for future analysis (CDB). ------------------------------------------------------------------------------------ 8. Additional comments or special requests. All FGS numbers refer to BAY numbers. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). ADRS will be available in Austin and at STScI. Some AST personnel will be available at STScI or GSFC to aid in reduction and analysis of the test data. ------------------------------------------------------------------------------------ 12. 32 Kbps engineering data - MA link presumed Results of this test: a check field is measured and analyzed for changes in geometric distortions. Any significant changes will indicate the need for a complete recalibration using AST-SV-02 for that particular FGS. We will also establish a frequency of recalibration of the FGS geometries. A non-null result indicates the need for further analysis prior to continuing the SV program. Page 3 ------------------------------------------------------------------------------------ 13. The data should be stored for trend analysis of geometric changes over the course of SV. ------------------------------------------------------------------------------------ 11. Address Information Name: WILLIAM H. JEFFERYS Category: PI Institution: UNIVERSITY OF TEXAS Address: City: State: Zip Code: Country: USA Telephone: (512) 471-3000 X445 Telex (or e-mail): ------------------------------------------------------------------------------------ Name: GEORGE BENEDICT Category: CON Institution: MCDONALD OBSERVATORY Address: UNIV. OF TEXAS City: AUSTIN State: TX Zip Code: 78712 Country: USA Telephone: (512) 471-3448 Telex (or e-mail): ------------------------------------------------------------------------------------ Name: LAURENCE FREDRICK Category: CON Institution: LEANDER MCCORMICK OBSERVATORY Address: UNIV. OF VIRGINIA P.O. BOX 3818 UNIV. STATION City: CHARLOTTESVILLE State: VA Zip Code: 229030818 Country: USA Telephone: (804) 924-4905 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 4151c [ 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 CK1-1 J,701 RA=04H 26M 54.20S +/- .01S, 2000 1 V=15.29 +/- 0.5 DEC=+58D 53' 37.40" +/- 0.2" Comments: CHECK FIELD STAR IN STEIN-2051A STAR 70 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 2 CK1-2-REF RA=04H 26M 47.48S +/- .01S, 2000 1 V=10.43 +/- 0.1 DEC=+58D 53' 45.3" +/- 0.2" Comments: CHECK FIELD STAR IN STEIN-2051A STEIN- 2051A Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) B 1953.00 0.0880 +/- 0.0007 0.1960 +/- 0.0100 0.1920 +/- 0.0100 ------------------------------------------------------------------------------------------------------------------------------------ 3 CK1-3-REF RA=04H 27M 2.24S +/- .01S, 2000 1 V=14.77 +/- 0.5 DEC=+58D 54' 5.5" +/- 0.2" Comments: CHECK FIELD STAR IN STEIN-2051A STAR 76 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 4 CK1-4-REF RA=04H 27M 2.68S +/- .01S, 2000 1 V=14.53 +/- 0.5 DEC=+58D 53' 33.80" +/- 0.2" Comments: CHECK FIELD STAR IN STEIN-2051A STAR 68 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 5 CK1-5-REF RA=04H 26M 3.96S +/- .01S, 2000 1 V=16.18 +/- 0.5 DEC=+58D 52' 48.90" +/- 0.2" Comments: CHECK FIELD STAR IN STEIN-2051A STAR 54 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 6 CK1-6-REF RA=04H 26M 58.89S +/- .01S, 2000 1 V=13.79 +/- 0.5 DEC=+58D 53' 22.80" +/- 0.2" Comments: CHECK FIELD STAR IN STEIN-2051A STAR 58 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 7 CK1-7-REF RA=04H 26M 48.43S +/- .01S, 2000 COMP 1 V=16.75 +/- 0.5 DEC=+58D 52' 9.20" +/- 0.2" Comments: CHECK FIELD STAR IN STEIN-2051A STAR 48 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 8 CK1-8-REF RA=04H 26M 45.22S +/- .01S, 2000 COMP 1 V=15.66 +/- 0.5 DEC=+58D 52' 19.40" +/- 0.2" Comments: CHECK FIELD STAR IN STEIN-2051A STAR 55 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 9 CK1-9-REF RA=04H 26M 45.29S +/- .01S, 2000 1 V=14.04 +/- 0.5 DEC=+58D 54' 4.20" +/- 0.2" Comments: CHECK FIELD STAR IN STEIN-2051A STAR 79 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 10 CK1-10-REF RA=04H 26M 55.40S +/- .01S, 2000 COMP 1 V=14.60 +/- 0.5 DEC=+58D 54' 29.00" +/- 0.2" Comments: CHECK FIELD STAR IN STEIN-2051A STAR 77 GFB LIST TARGET LIST a) Fixed Targets ID = 4151c [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 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| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ 11 CK2-1 J,701 RA=217.4291788D +/- 2000 1 V=11.02 +/- 0.1 0.00115D, DEC=-62.679483D +/- 0.00115D Comments: CHECK FIELD STAR IN PROXIMA-CEN PROXIMA CENTAURI Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J 2000.00 -0.5463 +/- 0.0007 0.8000 +/- 0.0100 0.7800 +/- 0.0100 ------------------------------------------------------------------------------------------------------------------------------------ 13 CK2-3-REF RA=217.4819342D +/- 2000 1 V=15.10 +/- 0.07 0.00115D, DEC=-62.689244D +/- 0.00115D Comments: CHECK FIELD STAR IN PROXIMA-CEN STAR 17 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 14 CK2-4-REF RA=217.4546217D +/- 2000 1 V=15.76 +/- 0.05 0.00115D, DEC=-62.689341D +/- 0.00115D Comments: CHECK FIELD STAR IN PROXIMA-CEN STAR 18 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 15 CK2-5-REF RA=217.4353808D +/- 2000 1 V=14.36 +/- 0.1 0.00115D, DEC=-62.691332D +/- 0.00115D Comments: CHECK FIELD STAR IN PROXIMA-CEN STAR 19 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 16 CK2-6-REF RA=217.4860771D +/- 2000 1 V=14.58 +/- 0.09 0.00115D, DEC=-62.662371D +/- 0.00115D Comments: CHECK FIELD STAR IN PROXIMA-CEN STAR 22 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 17 CK2-7-REF RA=217.434505D +/- 0.00115D, 2000 1 V=15.32 +/- 0.08 DEC=-62.686885D +/- 0.00115D Comments: CHECK FIELD STAR IN PROXIMA-CEN STAR 25 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 18 CK2-8-REF RA=217.42031251D +/- 2000 1 V=15.14 +/- 0.05 0.00115D, DEC=-62.694848D +/- 0.00115D Comments: CHECK FIELD STAR IN PROXIMA-CEN STAR 28 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ 20 CK2-10-REF RA=217.3731942D +/- 2000 1 V=14.30 +/- 0.11 0.00115D, DEC=-62.662674D +/- 0.00115D Comments: CHECK FIELD STAR IN PROXIMA-CEN STAR 37 GFB LIST ------------------------------------------------------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 4151c [ 6] ------------------------------------------------------------------------------------------------------------------------------------ 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| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 21 CK2-11-REF RA=217.3725963D +/- 2000 1 V=14.43 +/- 0.09 0.00115D, DEC=-62.667316D +/- 0.00115D Comments: CHECK FIELD STAR IN PROXIMA-CEN STAR 38 GFB LIST 2/01/92 TO 8/20/92. ------------------------------------------------------------------------------------------------------------------------------------ 22 CK2-12-REF RA=217.7322000D +/- 2000 1 V=11.83 +/- 0.29 0.00115D, DEC=-62.6906400D +/- 0.00115D Comments: CHECK FIELD STAR IN PROXIMA-CEN NEW STAR FROM GSSS 2/01/92 TO 8/20/92. ------------------------------------------------------------------------------------------------------------------------------------ 23 CK2-13-REF RA=217.2874917D +/- 2000 1 V=11.19 +/- 0.29 0.00115D, DEC=-62.5899600D +/- 0.00115D Comments: CHECK FIELD STAR IN PROXIMA-CEN NEW STAR FROM GSSS 2/01/92 TO 8/20/92. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 4151c [ 7] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 1.01 DEFINE CK2-1 FGS POS # F583W DATA-RATE=32 1 52S 1 # SEQ 1.01-1.11 NO CHECKP GAP Comments: SEE QUESTION 5. ------------------------------------------------------------------------------------------------------------------------------------ 1.03 DEFINE CK2-3-REF FGS POS # F583W DATA-RATE=32 1 52S 1 # CHECKP ------------------------------------------------------------------------------------------------------------------------------------ 1.04 DEFINE CK2-4-REF FGS POS # F583W DATA-RATE=32 1 52S 1 # CHECKP ------------------------------------------------------------------------------------------------------------------------------------ 1.05 DEFINE CK2-5-REF FGS POS # F583W DATA-RATE=32 1 52S 1 # CHECKP ------------------------------------------------------------------------------------------------------------------------------------ 1.06 DEFINE CK2-6-REF FGS POS # F583W DATA-RATE=32 1 52S 1 # CHECKP ------------------------------------------------------------------------------------------------------------------------------------ 1.07 DEFINE CK2-7-REF FGS POS # F583W DATA-RATE=32 1 52S 1 # CHECKP ------------------------------------------------------------------------------------------------------------------------------------ 1.08 DEFINE CK2-8-REF FGS POS # F583W DATA-RATE=32 1 52S 1 # CHECKP ------------------------------------------------------------------------------------------------------------------------------------ 1.1 DEFINE CK2-10-REF FGS POS # F583W DATA-RATE=32 1 52S 1 # CHECKP ------------------------------------------------------------------------------------------------------------------------------------ 1.1 DEFINE CK2-11-REF FGS POS # F583W DATA-RATE=32 1 52S 1 # CHECKP ------------------------------------------------------------------------------------------------------------------------------------ 1.1 DEFINE CK2-12-REF FGS POS # F583W DATA-RATE=32 1 52S 1 # CHECKP ------------------------------------------------------------------------------------------------------------------------------------ 1.1 DEFINE CK2-13-REF FGS POS # F583W DATA-RATE=32 1 52S 1 # CHECKP ------------------------------------------------------------------------------------------------------------------------------------ 1.11 DEFINE CK2-1 FGS POS # F583W DATA-RATE=32 1 52S 1 # CHECKP ------------------------------------------------------------------------------------------------------------------------------------ 11 USE 3 1 ORIENT 53D +/- CHECKP 2.0D CYCLE 2 / 11- 24.001 Comments: LINE 11 ESTABLISHES THE ROLL ORIENTA- TION THAT WAS USED FOR ORIGINAL 1418 MONITORING STABILITY. THE TIMING OF THIS PROPOSAL ASSUMES THAT LINE 11 IS DONE AROUND DAY 92.188. ORIENT 53D IS -30D FROM NOMINAL ON DAY 92.188. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 4151c [ 8] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 12 USE 3 1 ORIENT 30D +/- CHECKP 2.0D FROM NOMINAL SEQ 11 - 12.001 NO GAP Comments: LINE 12 ESTABLISHES THE ROLL ORIENTA- TION THAT WILL BE USED FOR LINES 12-24 TO MIN. DISTORTION EFFECTS IN MONITORING STABILITY. THE TIMING OF THIS PROPOSAL ASSUMES THAT LINE 12 IS DONE AROUND DAY 92.188. ------------------------------------------------------------------------------------------------------------------------------------ 12.001 USE 3 1 SAME POS FOR CHECKP 12.001 AS 12 ------------------------------------------------------------------------------------------------------------------------------------ 15 USE 3 1 AFTER 12 BY 10D +/ CHECKP - 1D SAME POS FOR 15 AS 12 SEQ 15-15.001 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 15.001 USE 3 1 SAME POS FOR CHECKP 15.001 AS 12 ------------------------------------------------------------------------------------------------------------------------------------ 17 USE 3 1 AFTER 12 BY 20D +/ CHECKP - 2D SAME POS FOR 17 AS 12 SEQ 17-17.001 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 17.001 USE 3 1 SAME POS FOR CHECKP 17.001 AS 12 ------------------------------------------------------------------------------------------------------------------------------------ 20 USE 3 1 AFTER 12 BY 33D +/ CHECKP - 2D SAME POS FOR 20 AS 12 SEQ 20-20.001 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 20.001 USE 3 1 SAME POS FOR CHECKP 20.001 AS 12 ------------------------------------------------------------------------------------------------------------------------------------ 23 USE 3 1 AFTER 12 BY 46D +/ CHECKP - 2D SAME POS FOR 23 AS 12 SEQ 23-23.001 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 4151c [ 9] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 23.001 USE 3 1 SAME POS FOR CHECKP 23.001 AS 12 ------------------------------------------------------------------------------------------------------------------------------------ 24 USE 3 1 AFTER 12 BY 51D +/ CHECKP - 3D SAME POS FOR 24 AS 12 SEQ 24-24.001 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 24.001 USE 3 1 SAME POS FOR CHECKP 24.001 AS 12 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 4151c [ 10] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FGS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes POS ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters DATA-RATE=32 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for SV/AST ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 2.50 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SEQ 1.01-1.11 NO GAP; ORIENT 53D +/- 2.0D; CYCLE 2 / 11-24.001; ORIENT 30D +/- 2.0D FROM NOMINAL; SEQ 11 - 12.001 NO GAP; SAME POS FOR 12.001 AS 12; AFTER 12 BY 10D +/- 1D; SAME POS FOR 15 AS 12; SEQ 15-15.001 NO GAP; SAME POS FOR 15.001 AS 12; AFTER 12 BY 20D +/- 2D; SAME POS FOR 17 AS 12; SEQ 17-17.001 NO GAP; SAME POS FOR 17.001 AS 12; AFTER 12 BY 33D +/- 2D; SAME POS FOR 20 AS 12; SEQ 20-20.001 NO GAP; SAME POS FOR 20.001 AS 12; AFTER 12 BY 46D +/- 2D; SAME POS FOR 23 AS 12; SEQ 23-23.001 NO GAP; SAME POS FOR 23.001 AS 12; AFTER 12 BY 51D +/- 3D; SAME POS FOR 24 AS 12; SEQ 24-24.001 NO GAP; SAME POS FOR 24.001 AS 12; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F583W ------------------------------------------------------------------------------------------------------------------------------------ Target Names CK1-1 CK1-2-REF CK1-3-REF CK1-4-REF CK1-5-REF CK1-6-REF CK1-7-REF CK1-8-REF CK1-9-REF CK1-10-REF CK2-1 CK2-3-REF CK2-4-REF CK2-5-REF CK2-6-REF CK2-7-REF CK2-8-REF CK2-10-REF CK2-11-REF CK2-12-REF CK2-13-REF ------------------------------------------------------------------------------------------------------------------------------------