11593( 13) - 30-Jun-2010 15:11:31 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11593 Version: 13 Check-in Time: 30-Jun-2010 15:11:31 STScI Edit Number: 4 Title Dynamical Masses of the Coolest Brown Dwarfs ------------------------------------------------------------------------------------ Type Cycle GO 17 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Michael C. Liu University of Hawaii CoI: Mr. Trent J. Dupuy University of Hawaii N CoI: Dr. Michael Ireland California Institute of Technology N ------------------------------------------------------------------------------------ Abstract T dwarfs are excellent laboratories to study the evolution and the atmospheric physics of both brown dwarfs and extrasolar planets. To date, only a single T dwarf binary has a dynamical mass determination, and more are sorely needed. The prospects of measuring more dynamical masses over the next decade are limited to 6 known short-period T dwarf binaries. We propose here to obtain Long-Term HST/ACS monitoring for the 3 of the 6 binaries which cannot be resolved with AO from the ground. Upon completion, our program will substantially increase the number of T dwarf dynamical mass measurements and thereby provide key benchmarks for testing theoretical models of ultracool objects. ------------------------------------------------------------------------------------ Observations Description ------------------------ Orbital monitoring of 3 methane brown dwarf (T dwarf) binaries. This is a long-term program with 6 epochs of imaging per target over 3 years. One PSF star (eps IndiBab) will be observed in the first year (Cycle 17). Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11593( 13) - 30-Jun-2010 15:11:31 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSJ042348. STAR, BROWN DWARF RA=04H23M48.5900S +/- 0.1", J2000 V = 25 J=14.5, H=13.5, K=12.9 57-041403.5 DEC=-04D14'3.50" +/- 0.1" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 2 2MASSJ051859 STAR, BROWN DWARF RA=05H18M59.9500S +/- 0.1", J2000 V = 25 J=16.0, H=14.8, K=14.2 95-2828372 DEC=-28D28'37.20" +/- 0.1" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSSJ092615. STAR, BROWN DWARF RA=09H26M15.3800S +/- 0.1", J2000 V = 25 J=15.9, H=15.3, K=15.5 38+584720.9 DEC=+58D47'20.90" +/- 0.1" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 4 EPS-IND-BAB STAR, BROWN DWARF RA=22H04M10.5200S +/- 0.1", J2000 V = 25 J=11.9, H=11.3, K=11.2 DEC=-56D46'57.70" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 5 EPSILON-INDI STAR, BROWN DWARF RA=22H04M12.2780S +/- 0.1", J2000 V = 25 J=11.9, H=11.3, K=11.2 -B DEC=-56D47'6.58" +/- 0.1" Reference Frame: ICRS Comments: Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2003.488 0.48205856403089786 -2.53923 0.27606 ------------------------------------------------------------------------------------------------------------------------------------ 11593( 13) - 30-Jun-2010 15:11:31 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 3.011 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 8 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.364 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 47.23 Angle_Between_Sides Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 7 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.265 Line_Spacing 0.187 Coordinate_Frame POS-TARG Pattern_Orient 20.67 Angle_Between_Sides 69.05 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 6 Primary_Pattern Secondary_Pattern Pattern_Type WFPC2-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.3535 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 45.0 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 11593( 13) - 30-Jun-2010 15:11:31 - [ 4] Visit: 01 Visit Requirements: BETWEEN 01-AUG-2009:00:00:00 AND 28-JAN-2010:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSJ042348 ACS/WFC ACCUM WFC1-1K F814W 1 340 S PATTERN 7 1 .57-041403. 5 ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSJ042348 ACS/WFC ACCUM WFC1-1K F814W 1 340 S PATTERN 8 2 .57-041403. 5 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SDSSJ042348.57-0414 1 ACS/WFC ACCUM WFC1-1K F814W 1 none none none 1 N/A 03.5 SDSSJ042348.57-0414 1 ACS/WFC ACCUM WFC1-1K F814W 2 none none none 1 N/A 03.5 SDSSJ042348.57-0414 1 ACS/WFC ACCUM WFC1-1K F814W 3 none none none 1 N/A 03.5 SDSSJ042348.57-0414 1 ACS/WFC ACCUM WFC1-1K F814W 4 none none none 1 N/A 03.5 SDSSJ042348.57-0414 2 ACS/WFC ACCUM WFC1-1K F814W 1 none none none 1 N/A 03.5 SDSSJ042348.57-0414 2 ACS/WFC ACCUM WFC1-1K F814W 2 none none none 1 N/A 03.5 11593( 13) - 30-Jun-2010 15:11:31 - [ 5] Visit: 02 Visit Requirements: BETWEEN 28-JUL-2010:00:00:00 AND 31-DEC-2010:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSJ042348 ACS/WFC ACCUM WFC1-1K F814W 1 340 S PATTERN 7 1 .57-041403. 5 ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSJ042348 ACS/WFC ACCUM WFC1-1K F814W 1 340 S PATTERN 8 2 .57-041403. 5 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SDSSJ042348.57-0414 1 ACS/WFC ACCUM WFC1-1K F814W 1 none none none 1 N/A 03.5 SDSSJ042348.57-0414 1 ACS/WFC ACCUM WFC1-1K F814W 2 none none none 1 N/A 03.5 SDSSJ042348.57-0414 1 ACS/WFC ACCUM WFC1-1K F814W 3 none none none 1 N/A 03.5 SDSSJ042348.57-0414 1 ACS/WFC ACCUM WFC1-1K F814W 4 none none none 1 N/A 03.5 SDSSJ042348.57-0414 2 ACS/WFC ACCUM WFC1-1K F814W 1 none none none 1 N/A 03.5 SDSSJ042348.57-0414 2 ACS/WFC ACCUM WFC1-1K F814W 2 none none none 1 N/A 03.5 11593( 13) - 30-Jun-2010 15:11:31 - [ 6] Visit: 03 Visit Requirements: BETWEEN 10-MAY-2009:00:00:00 AND 18-JAN-2010:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 2MASSJ05185 ACS/WFC ACCUM WFC F814W 1 1276 S PATTERN 1 1 995-2828372 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 2MASSJ05185995-2828 1 ACS/WFC ACCUM WFC F814W 1 none none none 1 N/A 372 2MASSJ05185995-2828 1 ACS/WFC ACCUM WFC F814W 2 none none none 1 N/A 372 11593( 13) - 30-Jun-2010 15:11:31 - [ 7] Visit: 05 Visit Requirements: GYRO MODE 2G; BETWEEN 01-DEC-2008:00:00:00 AND 10-APR-2009:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSJ092615 WFPC2 IMAGE PC1 F814W CR-SPLIT=NO 1 700 S GS ACQ SCENARIO BASE1T3; .38+584720. PATTERN 6 1 9 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SDSSJ092615.38+5847 1 WFPC2 IMAGE PC1 F814W 1 none none none 1 N/A 20.9 SDSSJ092615.38+5847 1 WFPC2 IMAGE PC1 F814W 2 none none none 1 N/A 20.9 SDSSJ092615.38+5847 1 WFPC2 IMAGE PC1 F814W 3 none none none 1 N/A 20.9 11593( 13) - 30-Jun-2010 15:11:31 - [ 8] Visit: 06 Visit Requirements: BETWEEN 07-JUN-2010:21:35:10 AND 31-DEC-2010:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSJ092615 ACS/WFC ACCUM WFC F814W 1 1401 S PATTERN 1 1 .38+584720. 9 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SDSSJ092615.38+5847 1 ACS/WFC ACCUM WFC F814W 1 none none none 1 N/A 20.9 SDSSJ092615.38+5847 1 ACS/WFC ACCUM WFC F814W 2 none none none 1 N/A 20.9 11593( 13) - 30-Jun-2010 15:11:31 - [ 9] Visit: 07 Visit Requirements: BETWEEN 01-JUN-2010:00:00:00 AND 31-DEC-2010:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 EPS-IND-BAB ACS/WFC ACCUM WFC1-1K F814W 4 80 S PATTERN 7 1 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 1 none 1 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 1 none 2 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 1 none 3 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 1 none 4 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 2 none 1 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 2 none 2 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 2 none 3 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 2 none 4 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 3 none 1 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 3 none 2 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 3 none 3 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 3 none 4 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 4 none 1 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 4 none 2 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 4 none 3 none 1 N/A EPS-IND-BAB 1 ACS/WFC ACCUM WFC1-1K F814W 4 none 4 none 1 N/A 11593( 13) - 30-Jun-2010 15:11:31 - [ 10] Visit: 55 Visit Requirements: BETWEEN 16-MAY-2009:00:00:00 AND 22-NOV-2009:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSJ092615 ACS/WFC ACCUM WFC F814W 1 1401 S PATTERN 1 1 .38+584720. 9 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SDSSJ092615.38+5847 1 ACS/WFC ACCUM WFC F814W 1 none none none 1 N/A 20.9 SDSSJ092615.38+5847 1 ACS/WFC ACCUM WFC F814W 2 none none none 1 N/A 20.9 11593( 13) - 30-Jun-2010 15:11:31 - [ 11] Visit: 57 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 EPSILON-IND ACS/WFC ACCUM WFC1-1K F814W 4 80 S PATTERN 7 1 I-B see below ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 1 none 1 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 1 none 2 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 1 none 3 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 1 none 4 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 2 none 1 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 2 none 2 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 2 none 3 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 2 none 4 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 3 none 1 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 3 none 2 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 3 none 3 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 3 none 4 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 4 none 1 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 4 none 2 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 4 none 3 none 1 79.0 S EPSILON-INDI-B 1 ACS/WFC ACCUM WFC1-1K F814W 4 none 4 none 1 79.0 S 11593( 13) - 30-Jun-2010 15:11:31 - [ 12] Summary Form for Proposal 11593 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PC1, WFC, WFC1-1K ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-AUG-2009:00:00:00 AND 28-JAN-2010:00:00:00, BETWEEN 01-DEC-2008:00:00:00 AND 10-APR-2009:00:00:00, BETWEEN 01-JUN-2010:00:00:00 AND 31-DEC-2010:00:00:00, BETWEEN 07-JUN-2010:21:35:10 AND 31-DEC-2010:00:00:00, BETWEEN 10-MAY-2009:00:00:00 AND 18-JAN-2010:00:00:00, BETWEEN 16-MAY-2009:00:00:00 AND 22-NOV-2009:00:00:00, BETWEEN 28-JUL-2010:00:00:00 AND 31-DEC-2010:00:00:00, GS ACQ SCENARIO BASE1T3, GYRO MODE 2G, PATTERN 1 1, PATTERN 6 1, PATTERN 7 1, PATTERN 8 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names 2MASSJ05185995-2828372, EPS-IND-BAB, EPSILON-INDI-B, SDSSJ042348.57-041403.5, SDSSJ092615.38+584720.9 ------------------------------------------------------------------------------------------------------------------------------------