! Proposal 6794, submission 1 ! PI: Bo Reipurth ! Received Fri Feb 16 13:44:44 EST 1996 ! From: steve@ctiow1.ctio.noao.edu ! $Id: 6794,v 8.1 1997/07/22 14:46:42 pepsa Exp $ ! Hubble Space Telescope Cycle 6 (1996) Phase II Proposal Template ! $Id: 6794,v 8.1 1997/07/22 14:46:42 pepsa Exp $ ! ! Refer to the HST Phase II Proposal Instructions to fill this out ! ! Anything after a "!" is ignored, and may be deleted ! ! All keywords with multiple entries are comma delimited except the ! Visit_Requirements and Special_Requirements keywords which can be ! delimited with carriage returns or semi-colons, but not commas ! ! For help call your Program Coordinator: Ready ! Phone: 410-338-4546 , E-mail: ready@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. ! Name of Phase I Proposal: archive-1038.reipurth.prop ! Date generated: Fri Dec 22 17:48:14 EST 1995 ! Proposal_Information ! Section 4 Title: PROPER MOTIONS OF HERBIG-HARO JETS Proposal_Category: GO Scientific_Category: BINARIES AND STAR FORMATION Cycle: 6 Investigators PI_name: Bo Reipurth PI_Institution: European Southern Observatory CoI_Name: Steve Heathcote CoI_Institution: Cerro Tololo InterAmerican Observatory Contact: Y ! Y or N (designate at most one contact) CoI_Name: Jon Morse CoI_Institution: University of Colorado Contact: ! Y or N (designate at most one contact) CoI_Name: Pat Hartigan CoI_Institution: Rice University Contact: ! Y or N (designate at most one contact) CoI_Name: John Bally CoI_Institution: University of Colorado Contact: ! Y or N (designate at most one contact) CoI_Name: Richard Schwartz CoI_Institution: University of Missouri Contact: ! Y or N (designate at most one contact) CoI_Name: Jeff Hester CoI_Institution: Arizona State University Contact: ! Y or N (designate at most one contact) ! ! ************************************************************ ! ! PLEASE NOTE: ! ! Due to complex schedules during 1996, we will often be away ! from our institutes. To avoid problems in communication ! we ask that you simultaneously contact both Steve Heathcote ! our designated contact and the PI, Bo Reipurth on all matters ! requiring an urgent response. ! ! ************************************************************ ! ! Abstract: ! Free format text (please update) We propose to re-observe the four Herbig-Haro jets and associated bow shocks which our group imaged with WFPC2 during Cycle 4, in order to measure the proper-motions of these high Mach number flows. The tangential velocities of several hundred km/s will produce displacements between our first- and second-epoch images of 2-4 pixels after only two years. Our first-epoch HST images have revealed that Herbig-Haro jets possess an astonishing amount of internal structure. The proposed second-epoch images add crucial physical knowledge -- how these newly disclosed structural components move. Our targets are the four best known, and most studied, HH flows: HH 47, HH 111, HH 34 and HH 1/2. Questions ! Free format text (please update) Observing_Description: Our proper-motion measurements will be made using a cross correlation technique which we developed and have used extensively to make proper-motion measurements from ground- based data. This technique makes optimal use of the data allowing accurate measurements to be made even for very faint features. Our experience shows that we can successfully correlate a low S/N image given a high S/N template, but that we get poor results when both exposures are of low S/N. For HH 47, HH 111 and HH 1/2 our first epoch images are of high S/N and make excellent cross correlation templates. The first epoch image of HH 34 was of short duration and consequently all but the very brightest few knots have low S/N. In this case we propose to obtain a high S/N second epoch image for use as template. We have performed extensive experiments cross correlating these images with lower S/N images (made using subsets of the data), in order to determine the S/N required in the second epoch images to obtain a given accuracy. We expect to measure displacements to an accuracy of +/- 0.05 - 0.1 WFPC pixel for features having S/N of > 10:1 in the brightest single pixel. Less accurate, but still useful results can be obtained for features with S/N down to 5:1. The exposure times specified in the proposal are those needed to achieve this target S/N. They have been calculated for each object given the measured count rates in the first epoch images and the known RON, dark rate and sky background rates. We will obtain images in both SII (F673N) and H-Alpha (F656N). It is necessary to observe with both filters, because some key features are only detectable in one or the other. For instance, the H-Alpha filaments and Mach disk of HH 47 are only detectable in F656N, while the main body of this jet, all but invisible in H-Alpha, is relatively bright in SII. Indeed the ability to separately measure the motion of low and high excitation material is crucial to the physical interpretation of our results. Thus use of a single broad band filter such as F702W, which passes both lines would not be appropriate. Real_Time_Justification: We wish to reproduce the pointings and ORIENTs used in the first epoch exposures as closely as possible. It is NOT necessary to reproduce positionsing to better than a few arcsec since we will use field stars to "register" the images. Our primary concern is to maximise the number of "reference" stars common to the two epochs. Many of our fields are very sparse. A secondary concern is to keep the offsets between the images small so that the distortion corrections are (differentialy) a second order effect, and hence the uncertainties in them are smaller yet. We give in the visit comments the ORIENTs used at the first epoch. We would like the ORIENT for the second epoch to be as close to this value as possible. However, any value within the range specified by the ORIENT special requirement is acceptable. This range has been carefully chosen to ensure all of each object, and an adequate number of reference stars are included in the field of view. In addition we give "backup" ORIENTs in the visit comments. While use of these involves some compromise in the set of reference stars available, they are acceptable if it would otherwise be impossible to schedule the observations. The object coordinates given are the HST coordinates used for the first epoch exposures (Cycle 4). Although, the objects have measurable proper motions, the shifts produced in a two year period will be negligible (a few pixels) from the point of view of pointing the telescope. No proper motion corrections should be applied to the coordinates given. For HH47 and HH111 POS-TARGs have been specified to compensate for the changes in the aperture definitions in the Project data base since the first epoch observations. These corrections are based on information supplied by Colin Cox on 08 Feb 1996. These POS-TARGs are only strictly correct if exactly the same ORIENT is used for the second epoch observations. However, the error is negligible within the range of acceptable ORIENTS. If the backup ORIENTS must be used it will be neccesary to use differnt POS-TARGs for all objects in order to correctly place them in the field. Therefore, please contact us should this proove necessary. Because of the high proper-motions of the objects it is essential that once the observations of a given object have commenced then they are completed (in both filters) within a 2 week period. For HH47, HH111, and HH1-2 all observations can be obtained in a single visit. For HH34 two visits are neccesary which we require be scheduled within 14 days of one another. Calibration_Justification: None Additional_Comments: We will use sub-pixel dithering to maximise spatial resolution as well as to remove bad pixels. On the other hand, because we are readout noise dominated our exposures are long, and reliable CR removal is also important. We will use a two position dither pattern as a compromise between these two requirements. Fixed_Targets ! Section 5.1 Target_Number: 1 Target_Name: HH47 Alternate_Names: HH46/47 Description: ISM, Herbig-Haro Object, Bipolar Outflow Position: RA= 08H 25M 47.32S +/- 1", DEC=-51D 00' 11.7" +/- 1", PLATE-ID = 00AI Equinox: J2000 RV_or_Z: V = -120 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: SURF-LINE(6731) = 8.2 +/- 0.1 E-15 W-LINE(6731) = 1.1 +/- 0.1 SURF-LINE(6563) = 3.7 +/- 0.1 E-15 W-LINE(6563) = 1.9 +/- 0.1 Comments: Flux data are for HH47B and give the observed (with HST) maximum surface brightness in that knot. Other features of interest are up to 2 orders of magnitude fainter than this. The flux given for 6731 is the sum of the fluxes for the two members of the 6717,31 doublet. Target_Number: 2 Target_Name: HH111 Alternate_Names: Description: ISM, Herbig-Haro Object, Bipolar Outflow Position: RA= 05H 51M 43.39S +/- 1", DEC=+02D 48' 33.9" +/- 1", PLATE-ID = 0084 !Plate ID was submitted with 04YQ Equinox: J2000 RV_or_Z: V = -70 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: SURF-LINE(6731) = 3.9 +/- 0.1 E-14 W-LINE(6731) = 1.8 +/- 0.1 SURF-LINE(6563) = 1.6 +/- 0.1 E-14 W-LINE(6563) = 2.2 +/- 0.1 Comments: Flux data are for HH111L and give the observed (with HST) maximum surface brightness in that knot. Other features of interest are up to 2 orders of magnitude fainter than this. The flux given for 6731 is the sum of the fluxes for the two members of the 6717,31 doublet. Target_Number: 3 Target_Name: HH1-2 Alternate_Names: Description: ISM, Herbig-Haro Object, Bipolar Outflow Position: RA= 05H 36M 23.36S +/- 1", DEC=-06D 46' 17" +/- 1", PLATE-ID = 02NB Equinox: J2000 RV_or_Z: V = +30 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: SURF-LINE(6731) = 2.0 +/- 0.1 E-13 W-LINE(6731) = 1.8 +/- 0.1 SURF-LINE(6563) = 1.8 +/- 0.1 E-12 W-LINE(6563) = 2.2 +/- 0.1 Comments: Flux data are for HH2A and give the observed (with HST) maximum surface brightness in that knot. Other features of interest are up to 3 orders of magnitude fainter than this. The flux given for 6731 is the sum of the fluxes for the two members of the 6717,31 doublet. Target_Number: 4 Target_Name: HH34-P1 Alternate_Names: Description: ISM, Herbig-Haro Object, Bipolar Outflow Position: RA= 05H 35M 30.22S +/- 1", DEC=-06D 27' 46" +/- 1", PLATE-ID = 02NB Equinox: J2000 RV_or_Z: V = -100 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: SURF-LINE(6731) = 2.4 +/- 0.1 E-14 W-LINE(6731) = 1.8 +/- 0.1 SURF-LINE(6563) = 3.5 +/- 0.1 E-15 W-LINE(6563) = 2.2 +/- 0.1 Comments: Flux data are for HH34I and give the observed (with HST) maximum surface brightness in that knot. Other features of interest are up to 2 orders of magnitude fainter than this. The flux given for 6731 is the sum of the fluxes for the two members of the 6717,31 doublet. ! This is a template for a single visit containing a single exposure ! Repeat exposure and visit blocks as needed Visits ! Section 6 Visit_Number: 1 Visit_Requirements: ! Section 7.1 ! ORIENTation 306D TO 340D ! WF4-FIX ! ORIENTation 126D TO 160D ! WF2-FIX ORIENTation 36D TO 70D ! WF3-FIX ! ORIENTation 216D TO 250D ! WF3-FIX On_Hold_Comments: Visit_Comments: ORIENT of first epoch exposure 56.0D. Acceptable range 36D to 70D. Backup ORIENTs: 306D to 340D WF4-FIX; 126D to 160D WF2-FIX; 216D to 250D WF3-FIX. Exposure_Number: 101 ! Section 6.5 Target_Name: HH47 Config: WFPC2 Opmode: IMAGE Aperture: WF3-FIX Sp_Element: F673N Wavelength: Optional_Parameters: CR-SPLIT=DEF Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: ! Section 7.2 POSition TARGet 3.5, 1.25 MAXimum DURation 5000S MINimum DURation 2400S Comments: POS-TARG approximately corrects for change in WF3-FIX aperture definition since 29/03/94. Exposure_Number: 102 ! Section 6.5 Target_Name: HH47 Config: WFPC2 Opmode: IMAGE Aperture: WF3-FIX Sp_Element: F673N Wavelength: Optional_Parameters: CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 1300S Special_Requirements: ! Section 7.2 POSition TARGet 3.75, 1.50 Comments: Exposure_Number: 103 ! Section 6.5 Target_Name: HH47 Config: WFPC2 Opmode: IMAGE Aperture: WF3-FIX Sp_Element: F656N Wavelength: Optional_Parameters: CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 1400S Special_Requirements: ! Section 7.2 SAME POSition AS 102 MAXimum DURation 2500S MINimum DURation 1200S Comments: Exposure_Number: 104 ! Section 6.5 Target_Name: HH47 Config: WFPC2 Opmode: IMAGE Aperture: WF3-FIX Sp_Element: F656N Wavelength: Optional_Parameters: CR-SPLIT=DEF Number_of_Iterations: 1 Time_Per_Exposure: 2800S Special_Requirements: ! Section 7.2 SAME POSition AS 101 MAXimum DURation 5000S MINimum DURation 2400S Comments: Visit_Number: 2 Visit_Requirements: ! Section 7.1 ORIENT 306.45D TO 306.45D ! ORIENTation 216D TO 250D ! WF3-FIX ! ORIENTation 126D TO 160D ! WF4-FIX ! ORIENTation 36D TO 70D ! WF2-FIX ! ORIENTation 306D TO 340D ! WF3-FIX On_Hold_Comments: Visit_Comments: ORIENT of first epoch exposure 306.45D. Acceptable range 306D to 340D. Backup ORIENTs: 216D to 250D WF3-FIX, 126D to 160D WF4-FIX, 36D to 70D WF2-FIX. Exposure_Number: 201 ! Section 6.5 Target_Name: HH111 Config: WFPC2 Opmode: IMAGE Aperture: WF3-FIX Sp_Element: F656N Wavelength: Optional_Parameters: CR-SPLIT=DEF Number_of_Iterations: 1 Time_Per_Exposure: 2400S Special_Requirements: ! Section 7.2 POSition TARGet -1.25, 1.25 MAXimum DURation 4000S MINimum DURation 2000S Comments: POS-TARG approximately corrects for change in WF3-FIX aperture definition since 14/11/94. Exposure_Number: 202 ! Section 6.5 Target_Name: HH111 Config: WFPC2 Opmode: IMAGE Aperture: WF3-FIX Sp_Element: F656N Wavelength: Optional_Parameters: CR-SPLIT=DEF Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: ! Section 7.2 POSition TARGet -1.50, 1.50 MAXimum DURation 4000S MINimum DURation 2000S Comments: Exposure_Number: 203 ! Section 6.5 Target_Name: HH111 Config: WFPC2 Opmode: IMAGE Aperture: WF3-FIX Sp_Element: F673N Wavelength: Optional_Parameters: CR-SPLIT=DEF Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: ! Section 7.2 SAME POSition AS 202 MAXimum DURation 4000S MINimum DURation 2000S Comments: Exposure_Number: 204 ! Section 6.5 Target_Name: HH111 Config: WFPC2 Opmode: IMAGE Aperture: WF3-FIX Sp_Element: F673N Wavelength: Optional_Parameters: CR-SPLIT=DEF Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: ! Section 7.2 SAME POSition AS 201 MAXimum DURation 4000S MINimum DURation 2000S Comments: Visit_Number: 3 Visit_Requirements: ! Section 7.1 ! Uncomment or copy visit level special requirements needed ! Most of these requirements (including ORIENT) will limit scheduling ! PCS MODE [Fine | Gyro] ! GUIDing TOLerance ! DROP TO GYRO IF NECESSARY [NO REACQuisition] ORIENTation 228D TO 244D ! WFALL-FIX ! ORIENTation TO FROM ! ORIENTation TO FROM NOMINAL ! SAME ORIENTation AS ! CVZ ! PARallel SCHEDulability 50% ! AFTER [BY [TO ]] ! AFTER ! BEFORE ! BETWEEN AND ! GROUP WITHIN