6127( 5) - 02/21/96 11:06 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6127 Version: 5 Check-in Date: 21-Feb-1996 11:03:31 1.Proposal Title: Velocity field and small scale structure in the L1551 IRS5 jet ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle Interstellar Medium GO 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Dr. Malcolm Fridlund Astrophysics Division, European Space Agency CoI: Dr. Rene Liseau Stockholm Observatory N CoI: Erik Lidberg Stockholm Observatory N ------------------------------------------------------------------------------------ 6. Abstract We propose to image the optical jet emanating from the young stellar object L1551 IRS5 over a period of three cycles. Using two narrow band filters sensitive to high- and low-excitation shocks respectively and two wide-band filters sensitive to line- emission and dust scattering respectively, we aim to study the time evolution of small scale structures within this object. Ground based observations have already detected the time scale for evolution of this object. HST is going to provide the level of detail necessary for a direct comparison with (existing) hydrodynamical models. Our data will resolve the smallest features observed (optically) so far in an astrophysical jet, and also detect their time evolution. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will obtain 4 deep images in each of H-Alpha, SII, R and the I-band in each cycle. Although, relative astrometry of the movements of the knots in the jet is the main purpose of this proposal, the orientation of the HST should be such that the few reference stars available within the field of view fall onto the wide field part of the camera thus making absolute astrometry possible. Real Time Justification ----------------------- None Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 6127( 5) - 02/21/96 11:06 - [ 2] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6127( 5) - 02/21/96 11:06 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 L1551-IRS5 ISM,HERBIG-HARO RA=4H 28M 40.23S +/- 0.02S, 1950.0 F-LINE(6563)=3.3e-14 OBJECT,BIPOLAR DEC=+18D 1' 42.23" +/- 0.7" W-LINE(6563)=7+/-3 OUTFLOW,JET F-LINE(6716)=1.0e-14 W-LINE(6716)=7+/-3 F-LINE(6731)=1.9e-14 W-LINE(6731)=7+/-3 Comments: Total fluxes for 10 arcsec by 2 arcsec part of jet. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 1982.11 0.0 0.0 0.0 6127( 5) - 02/21/96 11:06 - [ 4] Visit: 01 Visit Requirements: PCS MODE Fine ORIENTation 40D TO 90D 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 L1551-IRS5 WFPC2 IMAGE PC1 F675W CR-SPLIT=NO 3 600S ------------------------------------------------------------------------------------------------------------------------------------ 2 L1551-IRS5 WFPC2 IMAGE PC1 F814W CR-SPLIT=NO 3 770S SAME POSition AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 L1551-IRS5 WFPC2 IMAGE PC1 F673N 1 2500S SAME POSition AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 4 L1551-IRS5 WFPC2 IMAGE PC1 F656N 1 2500S SAME POSition AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 6127( 5) - 02/21/96 11:06 - [ 5] Visit: 50 Visit Requirements: PCS MODE Fine ORIENTation 40D TO 90D On Hold Comments: Additional Comments: This is a HOPR repeat of the first 6 exposures. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 L1551-IRS5 WFPC2 IMAGE PC1 F675W CR-SPLIT=NO 3 600S Comments: HOPR repeat observations ------------------------------------------------------------------------------------------------------------------------------------ 2 L1551-IRS5 WFPC2 IMAGE PC1 F814W CR-SPLIT=NO 3 770S SAME POSition AS 1 Comments: HOPR repeat observations. ------------------------------------------------------------------------------------------------------------------------------------ 6127( 5) - 02/21/96 11:06 - [ 6] Summary Form for Proposal 6127 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category Interstellar Medium ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PCS MODE Fine ORIENTation 40D TO 90D SAME POSition AS 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F675W F814W F673N F656N ------------------------------------------------------------------------------------------------------------------------------------ Target Names L1551-IRS5 ------------------------------------------------------------------------------------------------------------------------------------