11145( 3) - 06/25/07 13:25 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11145 Version: 3 Check-in Time: 25-Jun-2007 17:24:47 STScI Edit Number: 0 Title Probing the Planet Forming Region of T Tauri Stars in Chamaeleon ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO 16 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Nuria Calvet University of Michigan CoI: Ms. Catherine Espaillat University of Michigan N CoI: Dr. Edwin Anthony Bergin University of Michigan N ------------------------------------------------------------------------------------ Abstract By studying the inner, planet-forming regions of circumstellar disks around low-mass pre-main sequence stars we can refine theories of giant planet formation and develop timescales for the evolution of disks and their planets. Spitzer infrared observations of T Tauri stars in the Chamaeleon star-forming region have given us an unprecedented look at dust evolution in young objects. However, despite this ground breaking progress in studying the dust in young disks, the gas properties of the inner disk remain essentially unknown. Using ACS on HST, we propose to measure the H_2 emission originating in the innermost disk regions of classical T Tauri stars in different stages of evolution with the objective of revealing the timescales of gas dissipation and its relationship to dust evolution. This proposal is part of a comprehensive effort with approved programs on Spitzer, Gemini, and Magellan that aim to characterize the state of gas and dust in disks where planets may already have formed. ------------------------------------------------------------------------------------ 11145( 3) - 06/25/07 13:25 - [ 2] Observations Description ------------------------ ACS prism observations are being made of 12 young stellar objects in the Chamaeleon cloud to search for an emission feature at 1600 angstrom. The spectral element is the PR130L being used with the ACS/SBC. A single observation of an orbit in length is scheduled for each target. A pair of short observations is also scheduled, as these are needed for wavelength calibration. The pair of short images is being taken with the F140LP filter on the SBC/ACS. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- Revision: CS Cha filter changed from F140 to F165. Many of our targets were identified by the BOT tool as posing a hazard to the ACS/SBC based on assuming an incorrect spectral type of 05. We note the correct spectral types for these targets below: 1) T-25 M2.5 3) T-8 K2 4) T-26 G2 5) V-BM-CHA K4 6) V-BF-CHA K7 7) V-CS-CHA K6 8) T-6 K0 12) T-56 M0 In Visit 12 there is an additional object flagged by BOT (at 11 17 45.6, -77 04 23.78). However, plotting this object on a 2MASS color-color diagram shows that it cannot be higher than an F0 star and it therefore falls within the limits of Table 7.4 in the ACS handbook. ------------------------------------------------------------------------------------ 11145( 3) - 06/25/07 13:25 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 T-25 STAR, PROTOPLANETARY RA=11H07M19.1500S +/- 0.1", J2000 V = 15.35 DISK, T TAURI STAR DEC=-76D03'4.85" +/- 0.1" Reference Frame: Other: 2MASS 2 T-54 STAR, PROTOPLANETARY RA=11H12M42.6900S +/- 0.1", J2000 V = 11.16 DISK, T TAURI STAR DEC=-77D22'23.05" +/- 0.1" Reference Frame: Other: 2MASS 3 T-8 STAR, PROTOPLANETARY RA=10H59M6.9900S +/- 0.1", DEC=- J2000 V = 11.37 DISK, T TAURI STAR 77D01'40.44" +/- 0.1" Reference Frame: Other: 2MASS 4 T-26 STAR, PROTOPLANETARY RA=11H07M20.7400S +/- 0.1", J2000 V = 10.9 DISK, T TAURI STAR DEC=-77D38'7.35" +/- 0.1" Reference Frame: Other: SIMBAD 5 V-BM-CHA STAR, PROTOPLANETARY RA=13H08M6.2800S +/- 0.1", DEC=- J2000 V = 15.13 DISK, T TAURI STAR 77D55'5.18" +/- 0.1" Reference Frame: Other: 2MASS 6 V-BF-CHA STAR, PROTOPLANETARY RA=13H05M20.7200S +/- 0.1", J2000 V = 12.53 DISK, T TAURI STAR DEC=-77D39'1.60" +/- 0.1" Reference Frame: Other: 2MASS 7 V-CS-CHA STAR, T TAURI STAR, RA=11H02M24.9100S +/- 0.1", J2000 V = 11.69 PROTOPLANETARY DISK DEC=-77D33'35.72" +/- 0.1" Reference Frame: Other: 2MASS 8 T-6 STAR, T TAURI STAR, RA=10H58M16.7700S +/- 0.1", J2000 V = 11.99 PROTOPLANETARY DISK DEC=-77D17'17.06" +/- 0.1" Reference Frame: Other: 2MASS 9 T-31 STAR, T TAURI STAR, RA=11H08M1.4900S +/- 0.1", DEC=- J2000 V = 12.64 PROTOPLANETARY DISK 77D42'28.85" +/- 0.1" Reference Frame: Other: 2MASS 10 T-29 STAR, PROTOPLANETARY RA=11H07M57.9300S +/- 0.1", J2000 V = 14.2 DISK, T TAURI STAR DEC=-77D38'44.93" +/- 0.1" Reference Frame: Other: 2MASS 11 T-35 STAR, T TAURI STAR, RA=11H08M39.0500S +/- 0.1", J2000 V = 16.28 PROTOPLANETARY DISK DEC=-77D16'4.24" +/- 0.1" Reference Frame: Other: 2MASS 12 T-56 STAR, T TAURI STAR, RA=11H17M37.0100S +/- 0.1", J2000 V = 13.5 PROTOPLANETARY DISK DEC=-77D04'38.12" +/- 0.1" Reference Frame: Other: 2MASS 11145( 3) - 06/25/07 13:25 - [ 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 T-25 ACS/SBC ACCUM SBC F140LP 1 360 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 T-25 ACS/SBC ACCUM SBC PR130L 1 2500 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-25 1 ACS/SBC ACCUM SBC F140LP none none none none 1 360.0 S T-25 2 ACS/SBC ACCUM SBC PR130L none none none none 1 2455.0 S 11145( 3) - 06/25/07 13:25 - [ 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 T-54 ACS/SBC ACCUM SBC F140LP 2 360 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 T-54 ACS/SBC ACCUM SBC PR130L 2 1800 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-54 1 ACS/SBC ACCUM SBC F140LP none none 1 none 1 108.0 S T-54 1 ACS/SBC ACCUM SBC F140LP none none 2 none 1 108.0 S T-54 2 ACS/SBC ACCUM SBC PR130L none none 1 none 1 1258.0 S T-54 2 ACS/SBC ACCUM SBC PR130L none none 2 none 1 1258.0 S 11145( 3) - 06/25/07 13:25 - [ 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 T-8 ACS/SBC ACCUM SBC F140LP 2 360 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 T-8 ACS/SBC ACCUM SBC PR130L 2 1800 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-8 1 ACS/SBC ACCUM SBC F140LP none none 1 none 1 108.0 S T-8 1 ACS/SBC ACCUM SBC F140LP none none 2 none 1 108.0 S T-8 2 ACS/SBC ACCUM SBC PR130L none none 1 none 1 1258.0 S T-8 2 ACS/SBC ACCUM SBC PR130L none none 2 none 1 1258.0 S 11145( 3) - 06/25/07 13:25 - [ 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 T-26 ACS/SBC ACCUM SBC F140LP 2 360 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 T-26 ACS/SBC ACCUM SBC PR130L 2 1800 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-26 1 ACS/SBC ACCUM SBC F140LP none none 1 none 1 108.0 S T-26 1 ACS/SBC ACCUM SBC F140LP none none 2 none 1 108.0 S T-26 2 ACS/SBC ACCUM SBC PR130L none none 1 none 1 1258.0 S T-26 2 ACS/SBC ACCUM SBC PR130L none none 2 none 1 1258.0 S 11145( 3) - 06/25/07 13:25 - [ 8] Visit: 05 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 V-BM-CHA ACS/SBC ACCUM SBC F140LP 1 360 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 V-BM-CHA ACS/SBC ACCUM SBC PR130L 1 2500 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-BM-CHA 1 ACS/SBC ACCUM SBC F140LP none none none none 1 360.0 S V-BM-CHA 2 ACS/SBC ACCUM SBC PR130L none none none none 1 2455.0 S 11145( 3) - 06/25/07 13:25 - [ 9] Visit: 06 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 V-BF-CHA ACS/SBC ACCUM SBC F140LP 2 360 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 V-BF-CHA ACS/SBC ACCUM SBC PR130L 2 1800 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-BF-CHA 1 ACS/SBC ACCUM SBC F140LP none none 1 none 1 108.0 S V-BF-CHA 1 ACS/SBC ACCUM SBC F140LP none none 2 none 1 108.0 S V-BF-CHA 2 ACS/SBC ACCUM SBC PR130L none none 1 none 1 1258.0 S V-BF-CHA 2 ACS/SBC ACCUM SBC PR130L none none 2 none 1 1258.0 S 11145( 3) - 06/25/07 13:25 - [ 10] Visit: 07 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 V-CS-CHA ACS/SBC ACCUM SBC F165LP 2 360 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 V-CS-CHA ACS/SBC ACCUM SBC PR130L 2 1800 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-CS-CHA 1 ACS/SBC ACCUM SBC F165LP none none 1 none 1 108.0 S V-CS-CHA 1 ACS/SBC ACCUM SBC F165LP none none 2 none 1 108.0 S V-CS-CHA 2 ACS/SBC ACCUM SBC PR130L none none 1 none 1 1258.0 S V-CS-CHA 2 ACS/SBC ACCUM SBC PR130L none none 2 none 1 1258.0 S 11145( 3) - 06/25/07 13:25 - [ 11] Visit: 08 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 T-6 ACS/SBC ACCUM SBC F140LP 2 360 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 T-6 ACS/SBC ACCUM SBC PR130L 2 1800 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-6 1 ACS/SBC ACCUM SBC F140LP none none 1 none 1 108.0 S T-6 1 ACS/SBC ACCUM SBC F140LP none none 2 none 1 108.0 S T-6 2 ACS/SBC ACCUM SBC PR130L none none 1 none 1 1258.0 S T-6 2 ACS/SBC ACCUM SBC PR130L none none 2 none 1 1258.0 S 11145( 3) - 06/25/07 13:25 - [ 12] Visit: 09 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 T-31 ACS/SBC ACCUM SBC F140LP 2 360 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 T-31 ACS/SBC ACCUM SBC PR130L 2 1800 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-31 1 ACS/SBC ACCUM SBC F140LP none none 1 none 1 108.0 S T-31 1 ACS/SBC ACCUM SBC F140LP none none 2 none 1 108.0 S T-31 2 ACS/SBC ACCUM SBC PR130L none none 1 none 1 1258.0 S T-31 2 ACS/SBC ACCUM SBC PR130L none none 2 none 1 1258.0 S 11145( 3) - 06/25/07 13:25 - [ 13] Visit: 10 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 T-29 ACS/SBC ACCUM SBC F140LP 1 360 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 T-29 ACS/SBC ACCUM SBC PR130L 1 2500 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-29 1 ACS/SBC ACCUM SBC F140LP none none none none 1 360.0 S T-29 2 ACS/SBC ACCUM SBC PR130L none none none none 1 2455.0 S 11145( 3) - 06/25/07 13:25 - [ 14] Visit: 11 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 T-35 ACS/SBC ACCUM SBC F140LP 1 360 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 T-35 ACS/SBC ACCUM SBC PR130L 1 2500 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-35 1 ACS/SBC ACCUM SBC F140LP none none none none 1 360.0 S T-35 2 ACS/SBC ACCUM SBC PR130L none none none none 1 2455.0 S 11145( 3) - 06/25/07 13:25 - [ 15] Visit: 12 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 T-56 ACS/SBC ACCUM SBC F140LP 2 360 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 T-56 ACS/SBC ACCUM SBC PR130L 2 1800 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-56 1 ACS/SBC ACCUM SBC F140LP none none 1 none 1 108.0 S T-56 1 ACS/SBC ACCUM SBC F140LP none none 2 none 1 108.0 S T-56 2 ACS/SBC ACCUM SBC PR130L none none 1 none 1 1258.0 S T-56 2 ACS/SBC ACCUM SBC PR130L none none 2 none 1 1258.0 S 11145( 3) - 06/25/07 13:25 - [ 16] Summary Form for Proposal 11145 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures SBC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/SBC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F140LP PR130L F165LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names T-25 T-54 T-8 T-26 V-BM-CHA V-BF-CHA V-CS-CHA T-6 T-31 T-29 T-35 T-56 ------------------------------------------------------------------------------------------------------------------------------------