7627( 3) - 03/06/98 19:06 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 7627 Version: 3 Check-in Date: 06-Mar-1998 19:05:05 1.Proposal Title: WFPC2 Cycle 7 Astrometric Monitor ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle CAL/WF2 7 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: ANDREW FRUCHTER SPACE TELESCOPE SCIENCE INSTITUTE ------------------------------------------------------------------------------------ 5. 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 twice during cycle 7 at 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 with F555W. Two internal kspots observations will also be included in each visit. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- Fraction of GO/GTO Programs Supported is 20%. Also supports WFPC2-assisted target acquisitions for other instruments 2 pointed orbits needed for this program, each separated 6 months apart. Products: Improvements in METRIC and in the aperture reference file if required; ISR ------------------------------------------------------------------------------------ 7627( 3) - 03/06/98 19:06 - [ 2] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: ------------------------------------------------------------------------------------ 7627( 3) - 03/06/98 19:06 - [ 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 7627( 3) - 03/06/98 19:06 - [ 4] Visit: 01 Visit Priority: Visit Requirements: between 06-apr-98 and 26-apr-98 On Hold Comments: Additional Comments: If there are scheduling problems, please contact S. Gonzaga ASAP at x4412. Please check guide star availability in advance for both visits. Original Visit requirement was BETWEEN 01-JAN-98 AND 01-FEB-98. 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 F555W 1 100 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ 3 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 35, 35 ------------------------------------------------------------------------------------------------------------------------------------ 4 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 35.25, 35.25 ------------------------------------------------------------------------------------------------------------------------------------ 5 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 35, -35 ------------------------------------------------------------------------------------------------------------------------------------ 7 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG -35, -35 ------------------------------------------------------------------------------------------------------------------------------------ 8 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG -35.25, -35.25 ------------------------------------------------------------------------------------------------------------------------------------ 9 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG -35, 35 ------------------------------------------------------------------------------------------------------------------------------------ 11 KSPOTS WFPC2 IMAGE WFALL DEF ATD-GAIN=15 1 1 S ------------------------------------------------------------------------------------------------------------------------------------ 12 KSPOTS WFPC2 IMAGE WFALL DEF ATD-GAIN=15 1 2.6 S SEQ 11-12 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 7627( 3) - 03/06/98 19:06 - [ 5] Visit: 02 Visit Priority: Visit Requirements: between 08-sep-98 and 22-sep-98 On Hold Comments: Additional Comments: If there are scheduling problems, please contact S. Gonzaga ASAP at x4412, after visit 1 by about 6 months. Please check guide star availability in advance for both visits. Original Visit requirement was BETWEEN 01-JUL-98 AND 01-AUG-98. Second visit will now be ~5 months after first since target goes into SEZ. 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 F555W 1 100 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ 3 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 35, 35 ------------------------------------------------------------------------------------------------------------------------------------ 4 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 35.25, 35.25 ------------------------------------------------------------------------------------------------------------------------------------ 5 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG 35, -35 ------------------------------------------------------------------------------------------------------------------------------------ 7 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG -35, -35 ------------------------------------------------------------------------------------------------------------------------------------ 8 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG -35.25, -35.25 ------------------------------------------------------------------------------------------------------------------------------------ 9 OMEGA-CEN WFPC2 IMAGE WFALL F555W 1 100 S POS TARG -35, 35 ------------------------------------------------------------------------------------------------------------------------------------ 11 KSPOTS WFPC2 IMAGE WFALL DEF ATD-GAIN=15 1 1 S ------------------------------------------------------------------------------------------------------------------------------------ 12 KSPOTS WFPC2 IMAGE WFALL DEF ATD-GAIN=15 1 2.6 S SEQ 11-12 NON-INT Comments: DO KSPOTS BACK-TO-BACK ------------------------------------------------------------------------------------------------------------------------------------ 7627( 3) - 03/06/98 19:06 - [ 6] Summary Form for Proposal 7627 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN=15 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category CAL/WF2 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements between 06-apr-98 and 26-apr-98 POS TARG 0, 0 POS TARG 35, 35 POS TARG 35.25, 35.25 POS TARG 35, -35 POS TARG -35, -35 POS TARG -35.25, -35.25 POS TARG -35, 35 SEQ 11-12 NON-INT between 08-sep-98 and 22-sep-98 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F555W DEF ------------------------------------------------------------------------------------------------------------------------------------ Target Names OMEGA-CEN KSPOTS ------------------------------------------------------------------------------------------------------------------------------------