6941( 8) - 05/06/97 11:57 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6941 Version: 8 Check-in Date: 06-May-1997 10:00:54 1.Proposal Title: WFPC2 Cycle 6 Astrometry Verification ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle CAL/WF2 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: ANDREW FRUCHTER SPACE TELESCOPE SCIENCE INSTITUTE ------------------------------------------------------------------------------------ 6. Abstract This program will verify accuracy and stability of geometric transformation and relative astrometry solution ------------------------------------------------------------------------------------ Observations Description ------------------------ A very rich star field in Omega Centauri will be observed in five different positions with relative shifts of 40" in each coordinate. Positions of more than 2000 stars per chip will be compared between pointings using the three different astrometric solutions provided by Gilmozzi, Holtzman and Trauger, in order to verify and refine their accuracy. (Differences of up to 1 PC pixel exist in some regions of the field of view.) A very densely populated field is chosen in order to achieve better coverage of the field of view, even if at the expense of the accuracy of individual position measurements. Observations will be carried out in three filters, F555W, F300W, and F814W, to provide a verification and/or correction of the wavelength dependence of the solution. The F555W observation is repeated with smaller shifts of 15" to ensure a better coverage of the PC. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- Fraction of GO/GTO Programs Supported is 20%. Also supports WFPC2-assisted target acquisitions for other instruments 4 pointed orbits needed for this program Accuracy expected better than 0.01"; required better than 0.05" (full field of view). Products: Improvements in METRIC and in the aperture reference file if required; ISR ------------------------------------------------------------------------------------ 6941( 8) - 05/06/97 11:57 - [ 2] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: ------------------------------------------------------------------------------------ 6941( 8) - 05/06/97 11:57 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 OMEGA-CEN STELLAR CLUSTER, RA=13H 27M 11.83S +/- 0.1S, DEC= 2000 V = 21 GLOBULAR CLUSTER -47D 29' 54.7" +/- 1", PLATE- ID=ZZZR 6941( 8) - 05/06/97 11:57 - [ 4] Visit: 01 Visit Requirements: ORIENT 24.7D to 64.7D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 OMEGA-CEN WFPC2 IMAGE WFALL F300W 1 160 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ 2 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ 3 OMEGA-CEN WFPC2 IMAGE WFALL F814W 1 100 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ 4 OMEGA-CEN WFPC2 IMAGE WFALL F300W 1 160 S POS TARG 0.25, 0.25 ------------------------------------------------------------------------------------------------------------------------------------ 5 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 0.25, 0.25 ------------------------------------------------------------------------------------------------------------------------------------ 6 OMEGA-CEN WFPC2 IMAGE WFALL F814W 1 100 S POS TARG 0.25, 0.25 ------------------------------------------------------------------------------------------------------------------------------------ 7 OMEGA-CEN WFPC2 IMAGE WFALL F300W 1 160 S POS TARG 35, 35 ------------------------------------------------------------------------------------------------------------------------------------ 8 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 35, 35 ------------------------------------------------------------------------------------------------------------------------------------ 9 OMEGA-CEN WFPC2 IMAGE WFALL F814W 1 100 S POS TARG 35, 35 ------------------------------------------------------------------------------------------------------------------------------------ 10 OMEGA-CEN WFPC2 IMAGE WFALL F300W 1 160 S POS TARG 35.25, 35.25 ------------------------------------------------------------------------------------------------------------------------------------ 11 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 35.25, 35.25 ------------------------------------------------------------------------------------------------------------------------------------ 12 OMEGA-CEN WFPC2 IMAGE WFALL F814W 1 100 S POS TARG 35.25, 35.25 ------------------------------------------------------------------------------------------------------------------------------------ 13 OMEGA-CEN WFPC2 IMAGE WFALL F300W 1 160 S POS TARG 35, -35 ------------------------------------------------------------------------------------------------------------------------------------ 14 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 35, -35 ------------------------------------------------------------------------------------------------------------------------------------ 15 OMEGA-CEN WFPC2 IMAGE WFALL F814W 1 100 S POS TARG 35, -35 ------------------------------------------------------------------------------------------------------------------------------------ 16 OMEGA-CEN WFPC2 IMAGE WFALL F300W 1 160 S POS TARG 35.25, -35.25 ------------------------------------------------------------------------------------------------------------------------------------ 17 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 35.25, -35.25 ------------------------------------------------------------------------------------------------------------------------------------ 18 OMEGA-CEN WFPC2 IMAGE WFALL F814W 1 100 S POS TARG 35.25, -35.25 ------------------------------------------------------------------------------------------------------------------------------------ 19 OMEGA-CEN WFPC2 IMAGE WFALL F300W 1 160 S POS TARG -35, -35 ------------------------------------------------------------------------------------------------------------------------------------ 20 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG -35, -35 ------------------------------------------------------------------------------------------------------------------------------------ 21 OMEGA-CEN WFPC2 IMAGE WFALL F814W 1 100 S POS TARG -35, -35 ------------------------------------------------------------------------------------------------------------------------------------ 22 OMEGA-CEN WFPC2 IMAGE WFALL F300W 1 160 S POS TARG -35.25, -35.25 ------------------------------------------------------------------------------------------------------------------------------------ 23 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG -35.25, -35.25 ------------------------------------------------------------------------------------------------------------------------------------ 6941( 8) - 05/06/97 11:57 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 24 OMEGA-CEN WFPC2 IMAGE WFALL F814W 1 100 S POS TARG -35.25, -35.25 ------------------------------------------------------------------------------------------------------------------------------------ 25 OMEGA-CEN WFPC2 IMAGE WFALL F300W 1 160 S POS TARG -35, 35 ------------------------------------------------------------------------------------------------------------------------------------ 26 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG -35, 35 ------------------------------------------------------------------------------------------------------------------------------------ 27 OMEGA-CEN WFPC2 IMAGE WFALL F814W 1 100 S POS TARG -35, 35 ------------------------------------------------------------------------------------------------------------------------------------ 28 OMEGA-CEN WFPC2 IMAGE WFALL F300W 1 160 S POS TARG -35.25, 35.25 ------------------------------------------------------------------------------------------------------------------------------------ 29 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG -35.25, 35.25 ------------------------------------------------------------------------------------------------------------------------------------ 30 OMEGA-CEN WFPC2 IMAGE WFALL F814W 1 100 S POS TARG -35.25, 35.25 ------------------------------------------------------------------------------------------------------------------------------------ 31 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 15, 15 ------------------------------------------------------------------------------------------------------------------------------------ 32 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 15, -15 ------------------------------------------------------------------------------------------------------------------------------------ 33 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG -15, -15 ------------------------------------------------------------------------------------------------------------------------------------ 34 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG -15, 15 ------------------------------------------------------------------------------------------------------------------------------------ 6941( 8) - 05/06/97 11:57 - [ 6] Summary Form for Proposal 6941 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category CAL/WF2 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 24.7D to 64.7D POS TARG 0, 0 POS TARG 0.25, 0.25 POS TARG 35, 35 POS TARG 35.25, 35.25 POS TARG 35, -35 POS TARG 35.25, -35.25 POS TARG -35, -35 POS TARG -35.25, -35.25 POS TARG -35, 35 POS TARG -35.25, 35.25 POS TARG 15, 15 POS TARG 15, -15 POS TARG -15, -15 POS TARG -15, 15 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F300W F555W F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names OMEGA-CEN ------------------------------------------------------------------------------------------------------------------------------------