9805( 5) - 06/09/03 12:28 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 9805 Version: 5 Check-in Date: 09-Jun-2003 12:25:20 1.Proposal Title: OGLE-TR-56b: The Most Interesting Transiting Planet ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 12 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Dr. Dimitar D. Sasselov Harvard University CoI: Dr. Guillermo Torres Smithsonian Institution Astrophysical N Observatory CoI: Dr. Saurabh Jha University of California - Berkeley N CoI: Dr. Maciej Konacki California Institute of Technology N CoI: Dr. Shrinivas R. Kulkarni California Institute of Technology N ------------------------------------------------------------------------------------ 5. Abstract Our team has recently succeeded in confirming spectroscopically the discovery of the first extrasolar giant planet found in a transit search: OGLE-TR-56b. Its main parameters are: mass = 0.9 Jupiters, size = 1.3 Jupiters. Thus, OGLE-TR-56b appears to be similar to HD 209458b, the only other known transiting giant planet. Unfortunately, our planet radius determination is uncertain due to the very limited precision of the ground-based photometry, and does not allow for a meaningful comparison with theoretical model predictions. We propose HST observations with the ACS-HRC of the main transit of OGLE-TR-56b, which will improve the precision and the accuracy of the planet parameters by close to a factor of 10. In addition, we propose a timing experiment for the planet's extremely close orbit (1.2-day period, 0.023 AU from the star), which will allow us to detect the orbital decay and test convection theories. ------------------------------------------------------------------------------------ 9805( 5) - 06/09/03 12:28 - [ 2] Observations Description ------------------------ We propose to use the \emph{ACS-HRC} with the F475W and F775W filters, for 4 orbits each ({\bf a total of 8 orbits}). Two filters are essential for a complete modeling of the light curve parameters. These filters provide the best compromise between maximizing the photons and giving a long enough wavelength baseline and sensitivity to detect unresolved blends. The 4 full \emph{HST} orbits should be centered approximately on an ongoing transit, but it is crucial to assure adequate coverage before and after a transit as well (see Brown et al.\ 2001 for the HD~209458b transit). The transit of OGLE-TR-56b lasts 105 minutes, to be compared to the 96.5-min long \emph{HST} orbit. Sufficient time for telescope pointing and thermal stabilization before a transit is factored into our orbit request. No special calibrations are necessary, though we need to ensure that sufficiently high S/N ratio \emph{ACS- HRC} flat-fields are available. The ACS Exposure Time Calculator indicates that 60-sec integrations will allow a S/N ratio of 500 (at gain $=4$) in F775W, adopting $V = 16.6$ for the star and an estimated reddening of $E(B-V) = 0.47$. Such 60-sec integrations also provide the right cadence for the transit observations, so we propose them for all our primary eclipse observations. The proposed configuration should allow us to do precise photometry of the target in its relatively crowded field. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 9805( 5) - 06/09/03 12:28 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 OGLE-TR-56 STAR, G V-IV RA=17H56M35.51S +/- 0.1", DEC=- J2000 V = 16.6+/-0.05 29D32'21.2" +/- 0.1" Coordinate Source: Other_Source: Udalski et al. 2002, Acta Astronomica, 52, 115 9805( 5) - 06/09/03 12:28 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-HRC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.15 Coordinate_Frame POS-TARG Pattern_Orient 19.89 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 9805( 5) - 06/09/03 12:28 - [ 5] Visit: 01 Visit Priority: Visit Requirements: PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003:00:00:00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 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 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S PHASE 0.946 TO 0.952 C PATTERN 1 1-5 ------------------------------------------------------------------------------------------------------------------------------------ 2 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 3 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 4 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 5 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 9805( 5) - 06/09/03 12:28 - [ 6] Visit: 02 Visit Priority: Visit Requirements: PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003:00:00:00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 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 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S PHASE 0.971 TO 0.977 C PATTERN 1 1-5 ------------------------------------------------------------------------------------------------------------------------------------ 2 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 3 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 4 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 5 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 9805( 5) - 06/09/03 12:28 - [ 7] Visit: 03 Visit Priority: Visit Requirements: PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003:00:00:00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 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 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S PHASE 0.997 TO 0.0040 C PATTERN 1 1-5 ------------------------------------------------------------------------------------------------------------------------------------ 2 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 3 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 4 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 5 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 9805( 5) - 06/09/03 12:28 - [ 8] Visit: 04 Visit Priority: Visit Requirements: PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003:00:00:00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 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 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S PHASE 0.022 TO 0.028 C PATTERN 1 1-5 ------------------------------------------------------------------------------------------------------------------------------------ 2 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 3 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 4 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 5 OGLE-TR-56 ACS/HR ACCUM HRC F475W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 9805( 5) - 06/09/03 12:28 - [ 9] Visit: 05 Visit Priority: Visit Requirements: PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003:00:00:00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 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 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S PHASE 0.946 TO 0.955 C PATTERN 1 1-5 ------------------------------------------------------------------------------------------------------------------------------------ 2 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 3 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 4 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 5 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 9805( 5) - 06/09/03 12:28 - [ 10] Visit: 06 Visit Priority: Visit Requirements: PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003:00:00:00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 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 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S PHASE 0.971 TO 0.977 C PATTERN 1 1-5 ------------------------------------------------------------------------------------------------------------------------------------ 2 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 3 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 4 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 5 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 9805( 5) - 06/09/03 12:28 - [ 11] Visit: 07 Visit Priority: Visit Requirements: PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003:00:00:00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 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 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S PHASE 0.997 TO 0.0030 C PATTERN 1 1-5 ------------------------------------------------------------------------------------------------------------------------------------ 2 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 3 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 4 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 5 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 9805( 5) - 06/09/03 12:28 - [ 12] Visit: 08 Visit Priority: Visit Requirements: PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003:00:00:00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 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 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S PHASE 0.022 TO 0.028 C PATTERN 1 1-5 ------------------------------------------------------------------------------------------------------------------------------------ 2 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 3 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 4 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 5 OGLE-TR-56 ACS/HR ACCUM HRC F775W CR-SPLIT=NO,GAIN=4 1 75 S C ------------------------------------------------------------------------------------------------------------------------------------ 9805( 5) - 06/09/03 12:28 - [ 13] Summary Form for Proposal 9805 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures HRC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/HRC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO GAIN=4 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003 00 00 00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 PHASE 0.946 TO 0.952 PATTERN 1 1-5 PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003 00 00 00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 PHASE 0.971 TO 0.977 PATTERN 1 1-5 PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003 00 00 00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 PHASE 0.997 TO 0.0040 PATTERN 1 1-5 PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003 00 00 00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 PHASE 0.022 TO 0.028 PATTERN 1 1-5 PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003 00 00 00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 PHASE 0.946 TO 0.955 PATTERN 1 1-5 PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003 00 00 00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003 00 00 00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 PHASE 0.997 TO 0.0030 PATTERN 1 1-5 PCS MODE FINE SCHED 30% BEFORE 15-JUL-2003 00 00 00 Period 1.2119 D AND ZERO-PHASE JD2452072.68492 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F475W F775W ------------------------------------------------------------------------------------------------------------------------------------ Target Names OGLE-TR-56 ------------------------------------------------------------------------------------------------------------------------------------