6459( 3) - 02/07/96 15:34 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6459 Version: 3 Check-in Date: 07-Feb-1996 15:31:20 1.Proposal Title: The disk and jet structure of Holoea ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle COOL STARS GO 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Eugene Magnier Astronomy Department, University of Washington CoI: L.B.F.M. Waters University of Amsterdam N CoI: Yi-Jehng Kuan Academia Sinica N CoI: Eduardo Martin Instituto de Astrofisica N ------------------------------------------------------------------------------------ 6. Abstract We have discovered an object in the field of the Galactic open cluster M36 which exhibits a nebulous tail-like structure, a bipolar molecular outflow, a high- velocity ionized wind, and a bright central star with spectral type ~ K0 III (Magnier et al., 1995). This source, which we have nick-named ``Holoea'', most likely represents a very early stage in the evolution from embedded to naked T Tauri star. It also presents an unusual opportunity to study a stellar jet from two angles at once because of a fortuitous reflection off of the nebulous tail. For these reasons, we are vigorously pursuing a program to study this system in detail. Here, we propose to take high- resolution optical images to study the jet and accretion disk structures, both directly and through the reflection. We also hope to find HH objects or other knots in the outflow, which will allow us eventually to measure the distance to the object via proper motion. ------------------------------------------------------------------------------------ 6459( 3) - 02/07/96 15:34 - [ 2] Observations Description ------------------------ Our observations consist of 5 orbits, with 3 orbits placing the target on the PC for direct images, and the last three placing the object in the WF2 and WF3 for polarization images. Because we require good image quality and dynamic range, each image for a filter will be split into 3 exposures and dithered. This will allow us to limit the effect of cosmic rays, and also to overcome the problem of undersampling. For the three narrow band filters, we have chosen exposure times which give us ~ 5 -- 15 counts per PC pixel for most of the jet regions, while the wide-band B and V images have been chosen to give ~ 15 -- 45 counts per PC pixel. For the V images, the star itself will receive ~ 35,000 counts spread over 4 images, so there will be no danger of saturation. The other bands will have total counts for the central star of 2000 -- 8000 counts. One orbit will consist of the H-alpha and the unpolarized V images, one orbit will include the [OI] and unpolarized B images, and a third orbit will contain the [SII] images, which require somewhat longer exposure times as this line is somewhat fainter. We have also allocated 2 orbits for the polarized B and V images -- one polarization angle per orbit. For the polarized images, we will use the WF2 and WF3 CCDs to get 0 and 45 degree polarizations. We are more concerned about having the appropriate polarization angles and sufficent field of view than the relative calibration of the two CCDs -- furthermore, the direct light from the central star and neighboring stars will help us to calibrate the relative throughput of the two cameras. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: Astronomy Dept FM-20*University of Washington*Seattle, WA 98195 Ship Via: UPS Email: gene@astro.washington.edu , ------------------------------------------------------------------------------------ 6459( 3) - 02/07/96 15:34 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 IRAS05327+34 STAR, T Tauri Star, K V RA=05H 36M 05.9S +/- 0.1S, 2000 V = 16.5 04 -IV, ISM, Reflection DEC=34D 06' 18.1" +/- 0.1" B-V = 1.4 Nebula, Bipolar Outflow 6459( 3) - 02/07/96 15:34 - [ 4] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: If possible, I'd like all five orbits scheduled consecutively, to avoid major problems with rotated images. As a minimum the first pair of orbits (with V, V+pol(45), and V+pol(90)), should be consecutive, as should the second pair (orbits 3 and 4, with B, B+pol(45), B+pol(90)). Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 IRAS05327+3 WFPC2 IMAGE PC1-FIX F656N CR- 1 400S 404 SPLIT=NO,DITHER - TYPE=LINE,DITHE R-LINE- Comments: STEPS=3,CLOCKS= YES ------------------------------------------------------------------------------------------------------------------------------------ 2 IRAS05327+3 WFPC2 IMAGE PC1-FIX F555W CR- 1 40S 404 SPLIT=NO,DITHER - TYPE=LINE,DITHE R-LINE- Comments: STEPS=3,CLOCKS= YES ------------------------------------------------------------------------------------------------------------------------------------ 3 IRAS05327+3 WFPC2 IMAGE WF2-FIX F555W,POL CR- 1 180S 404 Q SPLIT=NO,DITHER - TYPE=LINE,DITHE R-LINE- Comments: STEPS=3,CLOCKS= YES ------------------------------------------------------------------------------------------------------------------------------------ 4 IRAS05327+3 WFPC2 IMAGE WF3-FIX F555W,POL CR- 1 180S 404 Q SPLIT=NO,DITHER - TYPE=LINE,DITHE R-LINE- Comments: STEPS=3,CLOCKS= YES ------------------------------------------------------------------------------------------------------------------------------------ 5 IRAS05327+3 WFPC2 IMAGE PC1-FIX F631N CR- 1 400S 404 SPLIT=NO,DITHER - TYPE=LINE,DITHE R-LINE- Comments: STEPS=3,CLOCKS= YES ------------------------------------------------------------------------------------------------------------------------------------ 6459( 3) - 02/07/96 15:34 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 6 IRAS05327+3 WFPC2 IMAGE PC1-FIX F439W CR- 1 100S 404 SPLIT=NO,DITHER - TYPE=LINE,DITHE R-LINE- Comments: STEPS=3,CLOCKS= YES ------------------------------------------------------------------------------------------------------------------------------------ 7 IRAS05327+3 WFPC2 IMAGE WF2-FIX F439W,POL CR- 1 200S 404 Q SPLIT=NO,DITHER - TYPE=LINE,DITHE R-LINE- Comments: STEPS=3,CLOCKS= YES ------------------------------------------------------------------------------------------------------------------------------------ 8 IRAS05327+3 WFPC2 IMAGE WF3-FIX F439W,POL CR- 1 200S 404 Q SPLIT=NO,DITHER - TYPE=LINE,DITHE R-LINE- Comments: STEPS=3,CLOCKS= YES ------------------------------------------------------------------------------------------------------------------------------------ 9 IRAS05327+3 WFPC2 IMAGE PC1-FIX F673N CR- 1 700S 404 SPLIT=NO,DITHER - TYPE=LINE,DITHE R-LINE- Comments: STEPS=3,CLOCKS= YES ------------------------------------------------------------------------------------------------------------------------------------ 6459( 3) - 02/07/96 15:34 - [ 6] Summary Form for Proposal 6459 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO DITHER-TYPE=LINE DITHER-LINE-STEPS=3 CLOCKS=YES ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category COOL STARS ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F656N F555W F555W,POLQ F631N F439W F439W,POLQ F673N ------------------------------------------------------------------------------------------------------------------------------------ Target Names IRAS05327+3404 ------------------------------------------------------------------------------------------------------------------------------------