9968( 6) - 08/05/04 12:07 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 9968 Version: 6 Check-in Date: 05-Aug-2004 16:06:04 1.Proposal Title: Fundamental properties of L-type dwarfs in binaries ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle 4. Parallel Pointing Tolerance GO 12 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Dr. Eduardo Martin University of Hawaii CoI: Dr. Jay Anderson Rice University N CoI: Dr. Ivan King University of Washington N CoI: Dr. Gibor Basri University of California - Berkeley N CoI: Dr. Wolfgang brandner European Southern Observatory - Germany N CoI: Dr. France Allard European Southern Observatory - Germany N CoI: Prof. Humberto Campins University of Central Florida N ------------------------------------------------------------------------------------ 6. Abstract We propose to characterize the physical properties of eight L-dwarfs in four binary systems. Our goal is to obtain astrometric, photometric and spectroscopic measurements of each component that will yield basic information on their atmospheric and dynamical properties. The high angular resolution of HST is essential because all these systems have angular separations $\le$0.5 arcsec. They do not have bright enough stars nearby that can be used for natural guide adaptive optics in ground-based telescopes. In Cycles~10 and 11 we propose to obtain WFPC2 and STIS data, allowing the determination of parallax, proper motion, position and spectral type for each component. In Cycle 12 we plan to obtain additional WFPC2 images for follow-up of the orbital motion and refinement of parallax and proper motion. We will also monitor possible intrinsic photometric variability in two filters (F675W and F814W). The STIS observations will provide spectral types, gravity sensitive indicators, and chromospheric activity (H$_\alpha$ emission) for each component. These 4 systems will constitute benchmarks for determining dynamical masses of L dwarfs, and inferring the age-mass-spectral type relationship of this new spectral class. ------------------------------------------------------------------------------------ 9968( 6) - 08/05/04 12:07 - [ 2] Observations Description ------------------------ This program is a continuation of program GO-9345. Observations should be similar to those completed for that program. Each binary should be centered on the PC camera. Observations with the filters F606W and F814W will allow us to check if there are any color-dependent variations in the astrometry or photometry. the same source. We request guide star acquisition and fine-lock guiding in order to ensure that our targets are well centered in the PC camera, and to avoid any drifts of the telescope. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 9968( 6) - 08/05/04 12:07 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 DENISJ0205- STAR, BROWN DWARF RA=02H05M29.4200S +/- 0.1", J2000 V = 25.0 1159 DEC=-11D59'29.40" +/- 0.1" I=18.3 Coordinate Source: Other_Source: DENIS catalog 2 MASSWJ1146+2 STAR, BROWN DWARF RA=11H46M34.0000S +/- 0.1", J2000 V = 24.0 2 DEC=+22D30'53.00" +/- 0.1" I = 17.6 Coordinate Source: Other_Source: 2MASS cataloge Comments: Binary. Separation = 0.29 arcsec. 3 DENISJ1228- STAR, BROWN DWARF RA=12H28M15.4200S +/- 0.1", J2000 V = 25.0 1547 DEC=-15D47'30.30" +/- 0.1" I=18.1 Coordinate Source: Other_Source: DENIS catalog Comments: Binary Sep=0.27 arcsec 4 DENISJ1441- STAR, BROWN DWARF RA=14H41M37.0000S +/- 0.1", J2000 V = 24.0 0945 DEC=-09D45'59.00" +/- 0.1" I=17.3 Coordinate Source: Other_Source: DENIS catalog Comments: Binary. Separation = 0.375 arcsec 9968( 6) - 08/05/04 12:07 - [ 4] Visit: 01 Visit Priority: 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 DENISJ0205- WFPC2 IMAGE PC1 F814W CR-SPLIT=DEF 1 400 S 1159 ------------------------------------------------------------------------------------------------------------------------------------ 2 DENISJ0205- WFPC2 IMAGE PC1 F814W 1 400 S POS TARG 0.25, 0.25 1159 ------------------------------------------------------------------------------------------------------------------------------------ 3 DENISJ0205- WFPC2 IMAGE PC1 F606W 1 540 S 1159 ------------------------------------------------------------------------------------------------------------------------------------ 4 DENISJ0205- WFPC2 IMAGE PC1 F606W 1 540 S 1159 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 01 1 none none none none 1 tbd 01 2 none none none none 1 tbd 01 3 none none none none 1 tbd 01 4 none none none none 1 tbd 9968( 6) - 08/05/04 12:07 - [ 5] Visit: 02 Visit Priority: 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 DENISJ1228- WFPC2 IMAGE PC1 F814W 1 400 S 1547 ------------------------------------------------------------------------------------------------------------------------------------ 2 DENISJ1228- WFPC2 IMAGE PC1 F814W 1 400 S POS TARG 0.25, 0.25 1547 ------------------------------------------------------------------------------------------------------------------------------------ 3 DENISJ1228- WFPC2 IMAGE PC1 F606W 1 500 S 1547 ------------------------------------------------------------------------------------------------------------------------------------ 4 DENISJ1228- WFPC2 IMAGE PC1 F606W 1 500 S 1547 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 02 1 none none none none 1 tbd 02 2 none none none none 1 tbd 02 3 none none none none 1 tbd 02 4 none none none none 1 tbd 9968( 6) - 08/05/04 12:07 - [ 6] Visit: 03 Visit Priority: 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 DENISJ1441- WFPC2 IMAGE PC1 F814W 1 400 S 0945 ------------------------------------------------------------------------------------------------------------------------------------ 2 DENISJ1441- WFPC2 IMAGE PC1 F814W 1 400 S POS TARG 0.25, 0.25 0945 ------------------------------------------------------------------------------------------------------------------------------------ 3 DENISJ1441- WFPC2 IMAGE PC1 F606W 1 500 S 0945 ------------------------------------------------------------------------------------------------------------------------------------ 4 DENISJ1441- WFPC2 IMAGE PC1 F606W 1 500 S 0945 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 03 1 none none none none 1 tbd 03 2 none none none none 1 tbd 03 3 none none none none 1 tbd 03 4 none none none none 1 tbd 9968( 6) - 08/05/04 12:07 - [ 7] Visit: 04 Visit Priority: 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 MASSWJ1146+ WFPC2 IMAGE PC1 F814W 1 400 S 22 ------------------------------------------------------------------------------------------------------------------------------------ 2 MASSWJ1146+ WFPC2 IMAGE PC1 F814W 1 400 S POS TARG 0.25, 0.25 22 ------------------------------------------------------------------------------------------------------------------------------------ 3 MASSWJ1146+ WFPC2 IMAGE PC1 F606W 1 500 S 22 ------------------------------------------------------------------------------------------------------------------------------------ 4 MASSWJ1146+ WFPC2 IMAGE PC1 F606W 1 500 S 22 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 04 1 none none none none 1 tbd 04 2 none none none none 1 tbd 04 3 none none none none 1 tbd 04 4 none none none none 1 tbd 9968( 6) - 08/05/04 12:07 - [ 8] Summary Form for Proposal 9968 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PC1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=DEF ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements POS TARG 0.25, 0.25 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F814W F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names DENISJ0205-1159 DENISJ1228-1547 DENISJ1441-0945 MASSWJ1146+22 ------------------------------------------------------------------------------------------------------------------------------------