6735( 6) - 08/26/96 16:36 - [ 0] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6735 Version: 6 Check-in Date: 26-Aug-1996 16:27:16 1.Proposal Title: Locating Disks, Accretion Flows, and Outflows in Close Binary T Tauri Stars ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle COOL STARS GO 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: ANDREA GHEZ UNIVERSITY OF CALIFORNIA LOS ANGELES CoI: Michal Simon State University of New York, Stony Brook N CoI: Cathie Clarke University of Cambridge N CoI: Russel White University of California, Los Angeles N ------------------------------------------------------------------------------------ 6. Abstract Although the standard model for star formation is based on single stars, we now know that most T Tauri stars are in multiple star systems with the majority having separations less than 100 AU, the size typically inferred for a circumstellar disk. Planetary Camera (PC) observations of a few T Tauri binary stars in Cycle 4 have revealed a particularly surprising result: contrary to the standard model for T Tauri stars, the secondary stars have ultra-violet (UV) but no infrared (IR) excesses. We interpret this as a signature of diskless accretion, a phenomenon previously unobserved in T Tauri stars. Furthermore, this result suggests that planetary formation is unlikely to occur around these close secondary stars. In Cycle 6, we propose to use the Planetary Camera aboard HST to carry out a high resolution imaging survey of T Tauri binary stars at a variety of wavelengths. These observations will reveal whether diskless accretion onto close (<= 100 AU) secondary stars is the norm. This would indicate the accretion of material with low angular momentum compared to the binary star and would thereby constrain binary star formation models. An additional outcome of this study is a unique test of the theoretical pre-main sequence tracks, as the components of close binary T Tauri stars are approximately coeval. ------------------------------------------------------------------------------------ Observations Description ------------------------ We propose to use the Planetary Camera to image the individual components of 12 close T Tauri binary star systems through the six HST filters, F336W, F439W, F555W, F675W, F814W, F656N. The first 5 filters are the broad band filter approximations to Johnson Cousins UBVRI system as recommended in the WFPC2 Instrument Handbook (Version 3.0, June 1995). The F656N is a narrow band fiter optimized for imaging the Halpha emission feature. Since the broad band filters yield a simultaneous characterization of the underlying continuum, the intensity of this emission feature can be estimated from these measurements. In order to obtain the high spatial resolution necessary to image binary stars with separations as small as 0."1, we (1) request the fine-lock guiding mode and (2) intend to take two sets of exposures for each source, where the second set is offset by 10.5 pixels in the x and y directions from the first set. The proposed observations for each object in each filter are identical except for the exposure times. The exposure times for the broadband filters were set to fill the CCD wells to 1/4 capacity based on WFPC2 specifications for system throughput, point spread function, and CCD charactersitics (pg. 66, WFPC2 Instrument Handbook) using the available unresolved UBRVI data for each source (which somewhat overestimates the individual component fluxes). The exposure times for the F336W filters were, for some sources, dropped below that needed to yield 1/4 well capacity due to orbital constraints, but nevertheless kept above a signal-to-noise ratio of 100. The observations for each target (i.e., each visit) fill 1 - 2 orbits depending on the object's brightness. Several fields (FV Tau, GH Tau & V955 Tau) actually contain other close binary systems within the field of view of the Planetary Camera. For these systems we plan to center the chip on a position halfway between the wide pair. Real Time Justification ----------------------- None Calibration Justification ------------------------- None Additional Comments ------------------- None ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6735( 6) - 08/26/96 16:36 - [ 1] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 FO-TAU STAR, T TAURI STAR RA=4H 14M 49.25S +/- 0.02S, 2000 V = 15.0+/-0.5 DEC=+28D 12' 31.31" +/- 0.1", TYPE=M2 PLATE-ID=00DG B-V = 0.3+/-0.5 3 FS-TAU STAR, T TAURI STAR RA=4H 22M 02.19S +/- 0.02S, 2000 V = 15.7+/-0.5 DEC=+26D 57' 30.93" +/- 0.1", TYPE=M1 PLATE-ID=000L B-V = 1.6+/-0.5 4 FV-TAU STAR, T TAURI STAR RA=4H 26M 53.99S +/- 0.02S, 2000 V = 15.4+/-0.5 DEC=+26D 06' 53.34" +/- 0.1", TYPE=K5 PLATE-ID=000L B-V = 1.7+/-0.5 Comments: The position is the mid-position between FV Tau and FV Tau/c (sep ~12.3"). Both are close binary T Tauri Stars. 5 FW-TAU STAR, T TAURI STAR RA=4H 29M 29.71S +/- 0.02S, 2000 V = 15.4+/-0.5 DEC=+26D 16' 53.54" +/- 0.1", TYPE=M4 PLATE-ID=000L B-V = 1.7+/-0.5 6 XZ-TAU STAR, T TAURI STAR RA=4H 31M 40.09S +/- 0.02S, 2000 V = 14.3+/-0.5 DEC=+18D 13' 57.15" +/- 0.1", TYPE=M3 PLATE-ID=000P B-V = 1.3+/-0.5 7 FY-TAU STAR, T TAURI STAR RA=4H 32M 30.59S +/- 0.02S, 2000 V = 15.4+/-0.5 DEC=+24D 19' 57.34" +/- 0.1", TYPE=M0 PLATE-ID=000L B-V = 1.7+/-0.5 8 GH-TAU STAR, T TAURI STAR RA=4H 33M 06.41S +/- 0.02S, 2000 V = 12.95+/-0.5 DEC=+24D 09' 45.60" +/- 0.1", TYPE=M2 PLATE-ID=000L B-V = 1.5+/-0.5 Comments: The position is the mid-position between GH Tau and V807 Tau (sep ~21.4"). Both are close binary T Tauri Stars. Since V807 is ~1.5mag brighter than GH Tau, we set the exposure times to achieve 1/8 well for GH and doubled the number of our F656N exposures. 9 IS-TAU STAR, T TAURI STAR RA=4H 33M 36.78S +/- 0.02S, 2000 V = 14.3+/-0.5 DEC=+26D 09' 49.44" +/- 0.1", TYPE=K2 PLATE-ID=000L B-V = 2.0+/-0.5 11 V955-TAU STAR, T TAURI STAR RA=4H 42M 07.55S +/- 0.02S, 2000 V = 14.74+/-0.5 DEC=+25D 23' 08.22" +/- 0.1", TYPE=K7 PLATE-ID=005N B-V = 1.8+/-0.5 Comments: The position is the mid-position between V955 Tau and LkHa 332/G1 (sep ~14.5"). Both are close binary T Tauri Stars. 6735( 6) - 08/26/96 16:36 - [ 2] Visit: 01 Visit Requirements: 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 FO-TAU WFPC2 IMAGE PC1 F336W 3342 1 160 S SEQ 1-13 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 FO-TAU WFPC2 IMAGE PC1 F439W 4300 1 120 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 FO-TAU WFPC2 IMAGE PC1 F555W 5614 1 10 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 4 FO-TAU WFPC2 IMAGE PC1 F675W 6696 1 6 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 5 FO-TAU WFPC2 IMAGE PC1 F814W 7921 1 3 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 6 FO-TAU WFPC2 IMAGE PC1 F656N 6564 1 40 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 8 FO-TAU WFPC2 IMAGE PC1 F336W 3342 1 160 S POS TARG 0.4778,0.4778 ------------------------------------------------------------------------------------------------------------------------------------ 9 FO-TAU WFPC2 IMAGE PC1 F439W 4300 1 120 S SAME POSit AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 10 FO-TAU WFPC2 IMAGE PC1 F555W 5614 1 10 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 11 FO-TAU WFPC2 IMAGE PC1 F675W 6696 1 6 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 12 FO-TAU WFPC2 IMAGE PC1 F814W 7921 1 3 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 13 FO-TAU WFPC2 IMAGE PC1 F656N 6564 1 40 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 6735( 6) - 08/26/96 16:36 - [ 3] Visit: 03 Visit Requirements: 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 FS-TAU WFPC2 IMAGE PC1 F336W 3342 1 800 S SEQ 1-6 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 FS-TAU WFPC2 IMAGE PC1 F439W 4300 1 400 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 FS-TAU WFPC2 IMAGE PC1 F555W 5614 1 20 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 4 FS-TAU WFPC2 IMAGE PC1 F675W 6696 1 12 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 5 FS-TAU WFPC2 IMAGE PC1 F814W 7921 1 5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 6 FS-TAU WFPC2 IMAGE PC1 F656N 6564 1 260 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 8 FS-TAU WFPC2 IMAGE PC1 F336W 3342 1 800 S POS TARG 0.4778,0.4778 SEQ 8-13 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 9 FS-TAU WFPC2 IMAGE PC1 F439W 4300 1 400 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 10 FS-TAU WFPC2 IMAGE PC1 F555W 5614 1 20 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 11 FS-TAU WFPC2 IMAGE PC1 F675W 6696 1 12 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 12 FS-TAU WFPC2 IMAGE PC1 F814W 7921 1 5 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 13 FS-TAU WFPC2 IMAGE PC1 F656N 6564 1 260 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 6735( 6) - 08/26/96 16:36 - [ 4] Visit: 04 Visit Requirements: 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 FV-TAU WFPC2 IMAGE PC1 F336W 3342 1 700 S SEQ 1-6 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 FV-TAU WFPC2 IMAGE PC1 F439W 4300 1 300 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 FV-TAU WFPC2 IMAGE PC1 F555W 5614 1 16 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 4 FV-TAU WFPC2 IMAGE PC1 F675W 6696 1 7.0 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 5 FV-TAU WFPC2 IMAGE PC1 F814W 7921 1 3.0 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 6 FV-TAU WFPC2 IMAGE PC1 F656N 6564 1 350 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 8 FV-TAU WFPC2 IMAGE PC1 F336W 3342 1 700 S POS TARG 0.4778,0.4778 SEQ 8-13 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 9 FV-TAU WFPC2 IMAGE PC1 F439W 4300 1 300 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 10 FV-TAU WFPC2 IMAGE PC1 F555W 5614 1 16 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 11 FV-TAU WFPC2 IMAGE PC1 F675W 6696 1 7.0 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 12 FV-TAU WFPC2 IMAGE PC1 F814W 7921 1 3.0 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 13 FV-TAU WFPC2 IMAGE PC1 F656N 6564 1 350 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 6735( 6) - 08/26/96 16:36 - [ 5] Visit: 05 Visit Requirements: 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 FW-TAU WFPC2 IMAGE PC1 F336W 3342 1 800 S SEQ 1-6 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 FW-TAU WFPC2 IMAGE PC1 F439W 4300 1 350 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 FW-TAU WFPC2 IMAGE PC1 F555W 5614 1 16 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 4 FW-TAU WFPC2 IMAGE PC1 F675W 6696 1 7.0 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 5 FW-TAU WFPC2 IMAGE PC1 F814W 7921 1 3.0 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 6 FW-TAU WFPC2 IMAGE PC1 F656N 6564 1 350 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 8 FW-TAU WFPC2 IMAGE PC1 F336W 3342 1 800 S POS TARG 0.4778,0.4778 SEQ 8-13 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 9 FW-TAU WFPC2 IMAGE PC1 F439W 4300 1 350 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 10 FW-TAU WFPC2 IMAGE PC1 F555W 5614 1 16 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 11 FW-TAU WFPC2 IMAGE PC1 F675W 6696 1 7.0 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 12 FW-TAU WFPC2 IMAGE PC1 F814W 7921 1 3.0 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 13 FW-TAU WFPC2 IMAGE PC1 F656N 6564 1 350 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 6735( 6) - 08/26/96 16:36 - [ 6] Visit: 06 Visit Requirements: 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 XZ-TAU WFPC2 IMAGE PC1 F336W 3342 1 160 S SEQ 1-13 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 XZ-TAU WFPC2 IMAGE PC1 F439W 4300 1 80 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 XZ-TAU WFPC2 IMAGE PC1 F555W 5614 1 5.0 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 4 XZ-TAU WFPC2 IMAGE PC1 F675W 6696 1 3.5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 5 XZ-TAU WFPC2 IMAGE PC1 F814W 7921 1 1.8 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 6 XZ-TAU WFPC2 IMAGE PC1 F656N 6564 1 20 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 8 XZ-TAU WFPC2 IMAGE PC1 F336W 3342 1 160 S POS TARG 0.4778,0.4778 ------------------------------------------------------------------------------------------------------------------------------------ 9 XZ-TAU WFPC2 IMAGE PC1 F439W 4300 1 80 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 10 XZ-TAU WFPC2 IMAGE PC1 F555W 5614 1 5.0 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 11 XZ-TAU WFPC2 IMAGE PC1 F675W 6696 1 3.5 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 12 XZ-TAU WFPC2 IMAGE PC1 F814W 7921 1 1.8 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 13 XZ-TAU WFPC2 IMAGE PC1 F656N 6564 1 20 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 6735( 6) - 08/26/96 16:36 - [ 7] Visit: 07 Visit Requirements: 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 FY-TAU WFPC2 IMAGE PC1 F336W 3342 1 800 S SEQ 1-6 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 FY-TAU WFPC2 IMAGE PC1 F439W 4300 1 350 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 FY-TAU WFPC2 IMAGE PC1 F555W 5614 1 16 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 4 FY-TAU WFPC2 IMAGE PC1 F675W 6696 1 6.0 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 5 FY-TAU WFPC2 IMAGE PC1 F814W 7921 1 3.0 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 6 FY-TAU WFPC2 IMAGE PC1 F656N 6564 1 200 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 8 FY-TAU WFPC2 IMAGE PC1 F336W 3342 1 800 S SEQ 8-13 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 9 FY-TAU WFPC2 IMAGE PC1 F439W 4300 1 350 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 10 FY-TAU WFPC2 IMAGE PC1 F555W 5614 1 16 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 11 FY-TAU WFPC2 IMAGE PC1 F675W 6696 1 6.0 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 12 FY-TAU WFPC2 IMAGE PC1 F814W 7921 1 3.0 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 13 FY-TAU WFPC2 IMAGE PC1 F656N 6564 1 200 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 6735( 6) - 08/26/96 16:36 - [ 8] Visit: 08 Visit Requirements: 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 GH-TAU WFPC2 IMAGE PC1 F336W 3342 1 40 S SEQ 1-13 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 GH-TAU WFPC2 IMAGE PC1 F439W 4300 1 8.0 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 GH-TAU WFPC2 IMAGE PC1 F555W 5614 1 0.4 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 4 GH-TAU WFPC2 IMAGE PC1 F675W 6696 1 0.26 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 5 GH-TAU WFPC2 IMAGE PC1 F814W 7921 1 0.16 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 6 GH-TAU WFPC2 IMAGE PC1 F656N 6564 1 10 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 7 GH-TAU WFPC2 IMAGE PC1 F656N 6564 1 10 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 8 GH-TAU WFPC2 IMAGE PC1 F336W 3342 1 40 S POS TARG 0.4778,0.4778 ------------------------------------------------------------------------------------------------------------------------------------ 9 GH-TAU WFPC2 IMAGE PC1 F439W 4300 1 8.0 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 10 GH-TAU WFPC2 IMAGE PC1 F555W 5614 1 0.4 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 11 GH-TAU WFPC2 IMAGE PC1 F675W 6696 1 0.26 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 12 GH-TAU WFPC2 IMAGE PC1 F814W 7921 1 0.16 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 13 GH-TAU WFPC2 IMAGE PC1 F656N 6564 1 10 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 14 GH-TAU WFPC2 IMAGE PC1 F656N 6564 1 10 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 6735( 6) - 08/26/96 16:36 - [ 9] Visit: 09 Visit Requirements: 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 IS-TAU WFPC2 IMAGE PC1 F336W 3342 1 1200 S SEQ 1-6 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 IS-TAU WFPC2 IMAGE PC1 F439W 4300 1 160 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 IS-TAU WFPC2 IMAGE PC1 F555W 5614 1 5.0 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 4 IS-TAU WFPC2 IMAGE PC1 F675W 6696 1 2.6 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 5 IS-TAU WFPC2 IMAGE PC1 F814W 7921 1 1.4 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 6 IS-TAU WFPC2 IMAGE PC1 F656N 6564 1 160 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 8 IS-TAU WFPC2 IMAGE PC1 F336W 3342 1 1200 S POS TARG 0.4778,0.4778 SEQ 8-13 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 9 IS-TAU WFPC2 IMAGE PC1 F439W 4300 1 160 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 10 IS-TAU WFPC2 IMAGE PC1 F555W 5614 1 5.0 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 11 IS-TAU WFPC2 IMAGE PC1 F675W 6696 1 2.6 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 12 IS-TAU WFPC2 IMAGE PC1 F814W 7921 1 1.4 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 13 IS-TAU WFPC2 IMAGE PC1 F656N 6564 1 160 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 6735( 6) - 08/26/96 16:36 - [ 10] Visit: 11 Visit Requirements: 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 V955-TAU WFPC2 IMAGE PC1 F336W 3342 1 160 S SEQ 1-13 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 V955-TAU WFPC2 IMAGE PC1 F439W 4300 1 100 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 V955-TAU WFPC2 IMAGE PC1 F555W 5614 1 8 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 4 V955-TAU WFPC2 IMAGE PC1 F675W 6696 1 3.5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 5 V955-TAU WFPC2 IMAGE PC1 F814W 7921 1 2.0 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 6 V955-TAU WFPC2 IMAGE PC1 F656N 6564 1 100 S SAME POS AS 2 ------------------------------------------------------------------------------------------------------------------------------------ 8 V955-TAU WFPC2 IMAGE PC1 F336W 3342 1 160 S POS TARG 0.4778,0.4778 ------------------------------------------------------------------------------------------------------------------------------------ 9 V955-TAU WFPC2 IMAGE PC1 F439W 4300 1 100 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 10 V955-TAU WFPC2 IMAGE PC1 F555W 5614 1 8.0 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 11 V955-TAU WFPC2 IMAGE PC1 F675W 6696 1 3.5 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 12 V955-TAU WFPC2 IMAGE PC1 F814W 7921 1 2.0 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 13 V955-TAU WFPC2 IMAGE PC1 F656N 6564 1 100 S SAME POS AS 8 ------------------------------------------------------------------------------------------------------------------------------------ 6735( 6) - 08/26/96 16:36 - [ 11] Summary Form for Proposal 6735 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category COOL STARS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SEQ 1-13 NON-INT SAME POS AS 1 POS TARG 0.4778,0.4778 SAME POSit AS 8 SAME POS AS 8 SEQ 1-6 NON-INT POS TARG 0.4778,0.4778 SEQ 8-13 NON-INT SAME POS AS 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F336W F439W F555W F675W F814W F656N ------------------------------------------------------------------------------------------------------------------------------------ Target Names FO-TAU FS-TAU FV-TAU FW-TAU XZ-TAU FY-TAU GH-TAU IS-TAU V955-TAU ------------------------------------------------------------------------------------------------------------------------------------