6754( 19) - 12/07/98 19:50 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6754 Version: 19 Check-in Date: 07-Dec-1998 19:37:31 1.Proposal Title: Imaging of the HH 30 Circumstellar Disk and Jets ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 6 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Karl Stapelfeldt Jet Propulsion Laboratory CoI: Christopher Burrows Space Telescope Science Institute N CoI: John Krist Space Telescope Science Institute N CoI: Alan Watson UNAM-Morelia Mexico N ------------------------------------------------------------------------------------ 5. Abstract Recent Hubble Space Telescope images have revealed HH 30 to be a prototype young stellar object (YSO) system possessing an optically thick circumstellar absorption disk extended perpendicular to highly collimated bipolar jets. The visible disk is 450 AU (3.2") in diameter and shows a resolved flaring profile consistent with accretion disk theory. This system is the first YSO disk ever observed at 14 AU resolution, and the first viewed close enough to edge-on that the vertical structure of the disk is clearly visible. We propose to build upon our initial results with Cycle 6 observations that address the following goals: 1) Further resolve the system by observing with the Planetary Camera, to better constrain the disk flaring profile; 2) measure the polarization structure of the nebulosity for comparison with multiple scattering models; 3) produce a much better map of the nebular colors via deeper imaging at short wavelengths; and 4) define the time history of the jet flow and the outer extent of the disk nebulosity via deep R band imaging. These studies of HH 30 offer a unique opportunity to expand understanding of accretion disk structure, and thereby constrain the disk evolution processes which profoundly affect theories of the origin of the solar system. ------------------------------------------------------------------------------------ 6754( 19) - 12/07/98 19:50 - [ 2] Observations Description ------------------------ Visits 02, 03, and 04 are polarization imaging on the PC. We allow changes in the telescope roll angle to provide us with the needed polarization coverage. Since HH 30 is a variable source, these visits should execute as close together in time as possible. This means an "opposition campaign". Experience with program 5845 is very relevant to this program, as its target and HH 30 are only 90 arcsec apart. 5845 was able to achieve exactly 60 degree roll angle spacings between its three visits and take observations on Nov. 28, Dec. 02, and Dec. 13 1995. We ask that visits 02, 03, and 04 be implemented in exactly the same way in fall 1997. Visit 01 consists of 4 orbits of direct imaging, plus 1 orbit of polarization imaging on the WFs. The latter is insurance against the possibility that HH 30 varies in brightness during the course of visits 02, 03, and 04. ORIENTs and POS TARGs for this visit are very tightly constrained in order that useful information can be obtained on HL Tau and XZ Tau simultaneously with HH 30. Real Time Justification ----------------------- Not Applicable. Calibration Justification ------------------------- No calibration requests. Additional Comments ------------------- None. ------------------------------------------------------------------------------------ Data Distribution Paper Products: Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 6754( 19) - 12/07/98 19:50 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HH-30 ISM, Herbig-Haro Object RA=04H 28M 43.60S +/- 0.1S, DEC= B1950 V = 19.5 18D 06' 03.0" +/- 1.0" 6754( 19) - 12/07/98 19:50 - [ 4] Visit: 02 Visit Priority: Visit Requirements: SCHED 100%; ORIENT 343D TO 347D 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 ------------------------------------------------------------------------------------------------------------------------------------ 21 HH-30 WFPC2 IMAGE PC1 F555W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 500 S GS ACQ SCENARIO SINGLE ------------------------------------------------------------------------------------------------------------------------------------ 22 HH-30 WFPC2 IMAGE PC1 F555W, CLOCKS=YES,ATD-GAIN=7, 1 1600 S POLQ CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 23 HH-30 WFPC2 IMAGE PC1 F555W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 400 S ------------------------------------------------------------------------------------------------------------------------------------ 24 HH-30 WFPC2 IMAGE PC1 F814W CLOCKS=YES,ATD-GAIN=7, 1 1800 S CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 25 HH-30 WFPC2 IMAGE WF3 F439W CLOCKS=YES,ATD-GAIN=7, 1 2400 S POS TARG -12.0, 0.0 CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 26 HH-30 WFPC2 IMAGE WF3 F675W CLOCKS=YES,ATD-GAIN=7, 2 2400 S POS TARG -12.0, 0.0 CR-SPLIT=0.50,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 6754( 19) - 12/07/98 19:50 - [ 5] Visit: 03 Visit Priority: Visit Requirements: SCHED 90%; ORIENT 38D TO 42D; AFTER 02 BY 3D TO 5D 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 ------------------------------------------------------------------------------------------------------------------------------------ 30 HH-30 WFPC2 IMAGE PC1 F814W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 230 S GS ACQ SCENARIO SINGLE ------------------------------------------------------------------------------------------------------------------------------------ 31 HH-30 WFPC2 IMAGE PC1 F555W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 300 S ------------------------------------------------------------------------------------------------------------------------------------ 32 HH-30 WFPC2 IMAGE PC1 F555W, CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 800 S POLQ ------------------------------------------------------------------------------------------------------------------------------------ 33 HH-30 WFPC2 IMAGE PC1 F555W, CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 700 S POLQ ------------------------------------------------------------------------------------------------------------------------------------ 6754( 19) - 12/07/98 19:50 - [ 6] Visit: 04 Visit Priority: Visit Requirements: ORIENT 95D TO 105D; AFTER 02 BY 11D TO 14D 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 ------------------------------------------------------------------------------------------------------------------------------------ 40 HH-30 WFPC2 IMAGE PC1 F814W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 230 S GS ACQ SCENARIO SINGLE ------------------------------------------------------------------------------------------------------------------------------------ 41 HH-30 WFPC2 IMAGE PC1 F555W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 300 S ------------------------------------------------------------------------------------------------------------------------------------ 42 HH-30 WFPC2 IMAGE PC1 F555W, CLOCKS=YES,ATD-GAIN=7, 1 1600 S POLQ CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 6754( 19) - 12/07/98 19:50 - [ 7] Visit: 05 Visit Priority: Visit Requirements: ORIENT 75D TO 75D; AFTER 02 BY 26D TO 30D 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 ------------------------------------------------------------------------------------------------------------------------------------ 50 HH-30 WFPC2 IMAGE PC1 F814W CLOCKS=YES,ATD-GAIN=7, 1 460 S CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 51 HH-30 WFPC2 IMAGE PC1 F555W CLOCKS=YES,ATD-GAIN=7, 1 520 S CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 52 HH-30 WFPC2 IMAGE PC1 F675W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 400 S ------------------------------------------------------------------------------------------------------------------------------------ 53 HH-30 WFPC2 IMAGE PC1 F675W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 400 S POS TARG 0.15, 0.15 ------------------------------------------------------------------------------------------------------------------------------------ 6754( 19) - 12/07/98 19:50 - [ 8] Visit: 13 Visit Priority: Visit Requirements: SCHED 90%; ORIENT 45D TO 47D; 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 ------------------------------------------------------------------------------------------------------------------------------------ 30 HH-30 WFPC2 IMAGE PC1 F814W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 230 S GS ACQ SCENARIO SINGLE POS TARG 12, 0 ------------------------------------------------------------------------------------------------------------------------------------ 31 HH-30 WFPC2 IMAGE PC1 F555W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 300 S POS TARG 12, 0 ------------------------------------------------------------------------------------------------------------------------------------ 32 HH-30 WFPC2 IMAGE PC1 F555W, CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 800 S POS TARG 12, 0 POLQ ------------------------------------------------------------------------------------------------------------------------------------ 33 HH-30 WFPC2 IMAGE PC1 F555W, CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 700 S POS TARG 12, 0 POLQ ------------------------------------------------------------------------------------------------------------------------------------ 6754( 19) - 12/07/98 19:50 - [ 9] Summary Form for Proposal 6754 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PC1 WF3 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CLOCKS=YES ATD-GAIN=7 CR-SPLIT=NO CR-TOLERANCE=0.0 CR-SPLIT=0.5 CR-SPLIT=0.50 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SCHED 100%; ORIENT 343D TO 347D GS ACQ SCENARIO SINGLE POS TARG -12.0, 0.0 SCHED 90%; ORIENT 38D TO 42D; AFTER 02 BY 3D TO 5D ORIENT 95D TO 105D; AFTER 02 BY 11D TO 14D ORIENT 75D TO 75D; AFTER 02 BY 26D TO 30D POS TARG 0.15, 0.15 SCHED 90%; ORIENT 45D TO 47D; GS ACQ SCENARIO SINGLE POS TARG 12, 0 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F555W F555W,POLQ F814W F439W F675W ------------------------------------------------------------------------------------------------------------------------------------ Target Names HH-30 ------------------------------------------------------------------------------------------------------------------------------------