! Hubble Space Telescope Cycle 5 (1995) Phase II Proposal Template
! $Id: 5976,v 8.1 1995/11/22 18:09:33 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: Doug Van Orsow
!             Phone: 410 338-4568    , E-mail: vanorsow@stsci.edu
!
! This partially completed template was generated from a Phase I proposal.
!  Date generated: Sun Dec 18 10:00:21 EST 1994
!

Proposal_Information                           ! Section 4
              Title:  Herbig-Haro Objects Near the Orion Nebula
  Proposal_Category:  GO
Scientific_Category:  Interstellar Medium
             Cycle:    5

Investigators
     PI_name:         C. Robert O'Dell
     PI_Institution:  Space Physics and Astronomy, Rice University

          CoI_Name:   David Axon
   CoI_Institution:   Space Telescope Science Institute
           Contact:             ! Y or N (designate at most one contact)

          CoI_Name:   Michael G. Burton
   CoI_Institution:   University of New South Wales
           Contact:             ! Y or N (designate at most one contact)

          CoI_Name:   Patrick M. Hartigan
   CoI_Institution:   Rice University
           Contact:             ! Y or N (designate at most one contact)

          CoI_Name:   John C. Raymond
   CoI_Institution:   Center for Astrophysics
           Contact:             ! Y or N (designate at most one contact)


Abstract:                                ! Free format text (please update)
    We propose to make WFPC2 images of both of the centers of
    known Herbig-Haro objects near the Orion Nebula in the two
    emission lines most sensitive to delineating their structure.
    The northern region has multiple Herbig-Haro objects appearing
    to have a common source, which is located at or near the BN-
    IRc2 source buried within the Orion Molecular Cloud-1.  The
    southern region is near theta^2   A Ori and seems to lie well
    in front of the main ionization layer of the nebula.  The
    proposed images should allow us to accurately determine the
    mechanisms of excitation of these Herbig-Haro objects and
    their interaction with the ambient nebula and cloud gas.  The
    fact that we have a good basic understanding of the major
    structure of this region, that there is a concentration of at
    least 10 Herbig-Haro objects in this area, and there is a good
    knowledge of the age and distance of the associated stellar
    cluster makes this the most promising region for the
    collective study of Herbig-Haro objects. The observations
    proposed would be in the SII F673N and OI F631N filters and
    would supplement observations in OIII F502N, HI F656N, and NII
    F658N already scheduled for the PI's GTO program.

Questions                       ! Free format text (please update)

     Observing_Description:
         The observations involve pointings at both the north and
         south Herbig-Haro object complexes. At both pointings one
         orbit will be spent in imaging in F631N(OI 6300 Angstroms) and
         a second orbit for F673N(SII 6717+6731 Angstrom).  Our
         previous observations in the north (600s) gave peak counts of
         600 in F673N. Our previous observations in the south (600s)
         gave 700 and 100 peak counts in F673N and F631N respectively.
         Even considering the probable concentration of the light into
         sharper images, at least three times the total exposure is
         needed, especially if we are to reach the fainter features.
         The observing plan would be to make three exposures per
         orbit, all in the same filter, which would allow a total
         exposure time of 1800 s and good cosmic ray subtraction.  The
         peak signal would then be about 2000 counts. If time is not
         available for both filter settings at each pointing, we would
         want to image both pointings in the F631N filter. As
         indicated in the figure in section 10, it is our intent to
         locate the south pointing so that the PC CCD includes both HH
         -203 and HH-204 (near PA=315D) and the north pointing
         so that all of the known Herbig-Haro objects fall within the
         field (PA=270D).

   Real_Time_Justification:


Calibration_Justification:    

      Additional_Comments:


Fixed_Targets      
  Target_Number:1
    Target_Name:NGC1976-SE
Alternate_Names: 
    Description:ISM,HII REGION,HERBIG-HARO OBJECT,EMISSION LINE NEBULA
       Position:RA = 5H 32M 56.550S +/- 0.01S, 
                DEC = -05D 27' 29.6" +/- 1"
        Equinox:1950
          Flux: SURF-LINE(6563) = 1.1 +/- 0.1 E-10 
       Comments:Surface brightness given is for the entire line.

  Target_Number:2
    Target_Name:NGC1976-SEPAR
Alternate_Names: 
    Description:ISM,HII REGION,HERBIG-HARO OBJECT,EMISSION LINE NEBULA
       Position:RA = 5H 32M 56.550S, 
                DEC = -05D 27' 29.6",
		REGION, R=5'
        Equinox:1950
          Flux: SURF-LINE(6563) = 1.1 +/- 0.1 E-10 
       Comments:Surface brightness given is for the entire line.

  Target_Number:3
    Target_Name:NGC1976-NW
Alternate_Names: 
    Description:ISM,HII REGION,HERBIG-HARO OBJECT,EMISSION LINE NEBULA
       Position:RA = 5H 32M 46.292S +/- 0.01S,
                DEC = -05D 23' 40.6" +/- 1"
        Equinox:1950
           Flux:SURF-LINE(6563) = 1.1 +/- 0.1 E-10
       Comments:Surface brightness given is for the entire line.

  Target_Number:4
    Target_Name:NGC1976-NWPAR
Alternate_Names: 
    Description:ISM,HII REGION,HERBIG-HARO OBJECT,EMISSION LINE NEBULA
       Position:RA = 5H 32M 46.292S,
                DEC = -05D 23' 40.6",
		REGION, R=5'
        Equinox:1950
           Flux:SURF-LINE(6563) = 1.1 +/- 0.1 E-10
       Comments:Surface brightness given is for the entire line.


Visits 
      Visit_Number:1
Visit_Requirements:ORIENT 314.0D TO 316.0D
  On_Hold_Comments:
    Visit_Comments:

     Exposure_Number:1
         Target_Name:NGC1976-SE
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F631N
          Wavelength:
 Optional_Parameters:CLOCKS=YES,
                     CR-SPLIT=NO
Number_of_Iterations:1
   Time_Per_Exposure:700S
Special_Requirements:NO SPLIT; SEQ 1,3,5 NON-INT
            Comments:

     Exposure_Number:2
         Target_Name:NGC1976-SEPAR
              Config:FOS/RD
              Opmode:ACCUM
            Aperture:4.3
          Sp_Element:G270H
          Wavelength:
 Optional_Parameters: 
                     
Number_of_Iterations:1
   Time_Per_Exposure:400S
Special_Requirements:PAR WITH 1
            Comments:COORD PARALLEL WITH 1

     Exposure_Number:3
         Target_Name:NGC1976-SE
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F631N
          Wavelength:
 Optional_Parameters:CLOCKS=YES,
                     CR-SPLIT=NO
Number_of_Iterations:1
   Time_Per_Exposure:700S
Special_Requirements:NO SPLIT
            Comments:

     Exposure_Number:4
         Target_Name:NGC1976-SEPAR
              Config:FOS/RD
              Opmode:ACCUM
            Aperture:4.3
          Sp_Element:G270H
          Wavelength:
 Optional_Parameters: 
                     
Number_of_Iterations:1
   Time_Per_Exposure:340S
Special_Requirements:PAR WITH 3
            Comments:COORD PARALLEL WITH 3

     Exposure_Number:5
         Target_Name:NGC1976-SE
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F631N
          Wavelength:
 Optional_Parameters:CLOCKS=YES,
                     CR-SPLIT=NO
Number_of_Iterations:1
   Time_Per_Exposure:700S
Special_Requirements:NO SPLIT;
		     END ORBIT
            Comments:

     Exposure_Number:6
         Target_Name:NGC1976-SEPAR
              Config:FOS/RD
              Opmode:ACCUM
            Aperture:4.3
          Sp_Element:G270H
          Wavelength:
 Optional_Parameters: 
Number_of_Iterations:1
   Time_Per_Exposure:340S
Special_Requirements:PAR WITH 5 
            Comments:COORD PARALLEL WITH 5

     Exposure_Number:7
         Target_Name:NGC1976-SE
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F673N
          Wavelength:
 Optional_Parameters:CLOCKS=YES,
                     CR-SPLIT=NO
Number_of_Iterations:1
   Time_Per_Exposure:700S
Special_Requirements:NO SPLIT
                     SAME POS AS 1
		     SEQ 7,9,11,13 NON-INT
            Comments:

     Exposure_Number:8
         Target_Name:NGC1976-SEPAR
              Config:FOS/RD
              Opmode:ACCUM
            Aperture:4.3
          Sp_Element:G270H
          Wavelength:
 Optional_Parameters:

Number_of_Iterations:1
   Time_Per_Exposure:400S
Special_Requirements:PAR WITH 7
            Comments:COORD PARALLEL WITH 7

     Exposure_Number:9
         Target_Name:NGC1976-SE
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F673N
          Wavelength:
 Optional_Parameters:CLOCKS=YES,
                     CR-SPLIT=NO
Number_of_Iterations:1
   Time_Per_Exposure:700S
Special_Requirements:NO SPLIT
                     SAME POS AS 1
            Comments:

     Exposure_Number:10
         Target_Name:NGC1976-SEPAR
              Config:FOS/RD
              Opmode:ACCUM
            Aperture:4.3
          Sp_Element:G270H
          Wavelength:
 Optional_Parameters:

Number_of_Iterations:1
   Time_Per_Exposure:340S
Special_Requirements:PAR WITH 9
            Comments:COORD PARALLEL WITH 9

     Exposure_Number:11
         Target_Name:NGC1976-SE
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F673N
          Wavelength:
 Optional_Parameters:CLOCKS=YES,
                     CR-SPLIT=NO
Number_of_Iterations:1
   Time_Per_Exposure:700S
Special_Requirements:NO SPLIT
                     SAME POS AS 1
            Comments:

     Exposure_Number:12
         Target_Name:NGC1976-SEPAR
              Config:FOS/RD
              Opmode:ACCUM
            Aperture:4.3
          Sp_Element:G270H
          Wavelength:
 Optional_Parameters:

Number_of_Iterations:1
   Time_Per_Exposure:340S
Special_Requirements:PAR WITH 11
            Comments:COORD PARALLEL WITH 11

     Exposure_Number:13
         Target_Name:NGC1976-SE
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F791W
          Wavelength:
 Optional_Parameters:CLOCKS=YES,
                     CR-SPLIT=NO
Number_of_Iterations:2
   Time_Per_Exposure:100S
Special_Requirements:NO SPLIT
                     SAME POS AS 1
            Comments:

      Visit_Number:2
Visit_Requirements:ORIENT 270.8D TO 272.80D
  On_Hold_Comments:
    Visit_Comments:

     Exposure_Number:14
         Target_Name:NGC1976-NW
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F631N
          Wavelength:
 Optional_Parameters:CLOCKS=NO,
                     CR-SPLIT=NO
Number_of_Iterations:1
   Time_Per_Exposure:600S
Special_Requirements:NO SPLIT; SEQ 14,16,18 NON-INT
            Comments:

     Exposure_Number:15
         Target_Name:NGC1976-NWPAR
              Config:FOS/RD
              Opmode:ACCUM
            Aperture:4.3
          Sp_Element:G270H
          Wavelength:
 Optional_Parameters:

Number_of_Iterations:1
   Time_Per_Exposure:400S
Special_Requirements:PAR WITH 14
            Comments:COORD PARALLEL WITH 14

     Exposure_Number:16
         Target_Name:NGC1976-NW
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F631N
          Wavelength:
 Optional_Parameters:CLOCKS=NO,
                     CR-SPLIT=NO
Number_of_Iterations:1
   Time_Per_Exposure:600S
Special_Requirements:NO SPLIT
            Comments:

     Exposure_Number:17
         Target_Name:NGC1976-NWPAR
              Config:FOS/RD
              Opmode:ACCUM
            Aperture:4.3
          Sp_Element:G270H
          Wavelength:
 Optional_Parameters:

Number_of_Iterations:1
   Time_Per_Exposure:340S
Special_Requirements:PAR WITH 16
            Comments:COORD PARALLEL WITH 16

     Exposure_Number:18
         Target_Name:NGC1976-NW
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F631N
          Wavelength:
 Optional_Parameters:CLOCKS=NO,
                     CR-SPLIT=NO
Number_of_Iterations:1
   Time_Per_Exposure:600S
Special_Requirements:NO SPLIT;
		     END ORBIT
            Comments:

     Exposure_Number:19
         Target_Name:NGC1976-NWPAR
              Config:FOS/RD
              Opmode:ACCUM
            Aperture:4.3
          Sp_Element:G270H
          Wavelength:
 Optional_Parameters:

Number_of_Iterations:1
   Time_Per_Exposure:340S
Special_Requirements:PAR WITH 18
            Comments:COORD PARALLEL WITH 18

     Exposure_Number:20
         Target_Name:NGC1976-NW
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F673N
          Wavelength:
 Optional_Parameters:CLOCKS=NO,
                     CR-SPLIT=NO
Number_of_Iterations:1   
   Time_Per_Exposure:600S
Special_Requirements:NO SPLIT
                     SAME POS AS 14
    		     SEQ 20,22,24,26 NON-INT
            Comments:

     Exposure_Number:21
         Target_Name:NGC1976-NWPAR
              Config:FOS/RD
              Opmode:ACCUM
            Aperture:4.3
          Sp_Element:G270H
          Wavelength:
 Optional_Parameters:

Number_of_Iterations:1
   Time_Per_Exposure:400S
Special_Requirements:PAR WITH 20
            Comments:COORD PARALLEL WITH 20

     Exposure_Number:22
         Target_Name:NGC1976-NW
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F673N
          Wavelength:
 Optional_Parameters:CLOCKS=NO,
                     CR-SPLIT=NO
Number_of_Iterations:1
   Time_Per_Exposure:600S
Special_Requirements:NO SPLIT
                     SAME POS AS 14
            Comments:

     Exposure_Number:23
         Target_Name:NGC1976-NWPAR
              Config:FOS/RD
              Opmode:ACCUM
            Aperture:4.3
          Sp_Element:G270H
          Wavelength:
 Optional_Parameters:

Number_of_Iterations:1
   Time_Per_Exposure:340S
Special_Requirements:PAR WITH 22
            Comments:COORD PARALLEL WITH 22

     Exposure_Number:24
         Target_Name:NGC1976-NW
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F673N
          Wavelength:
 Optional_Parameters:CLOCKS=NO,
                     CR-SPLIT=NO
Number_of_Iterations:1
   Time_Per_Exposure:600S
Special_Requirements:NO SPLIT
                     SAME POS AS 14
            Comments:

     Exposure_Number:25
         Target_Name:NGC1976-NWPAR
              Config:FOS/RD
              Opmode:ACCUM
            Aperture:4.3
          Sp_Element:G270H
          Wavelength:
 Optional_Parameters:

Number_of_Iterations:1
   Time_Per_Exposure:340S
Special_Requirements:PAR WITH 24
            Comments:COORD PARALLEL WITH 24

     Exposure_Number:26
         Target_Name:NGC1976-NW
              Config:WFPC2
              Opmode:IMAGE
            Aperture:WFALL
          Sp_Element:F791W
          Wavelength:
 Optional_Parameters:CLOCKS=NO,
                     CR-SPLIT=NO
Number_of_Iterations:2
   Time_Per_Exposure:100S
Special_Requirements:NO SPLIT
                     SAME POS AS 14
            Comments:

Data_Distribution             

         Medium:        8MM  
Blocking_Factor:        10  
                           
                          
                         

        Ship_To: 	PI_address
                                        
                                       
                                       
       Ship_Via:        UPS           
                                     

Recipient_Email: