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Examples of GHRS Phase II Proposals

GHRS Instrument Handbook


Figure 4.1: An acquisition of a star into the LSA followed by an SSA peakup and two ACCUMs.

Visits 
       Visit_Number: 1
Visit_Requirements: BETWEEN 5-MAY-1996 AND 8-JUN-1996
    Visit_Comments: Coordinated with ground observations.

     Exposure_Number: 1 
         Target_Name: HD12345
              Config: HRS
              Opmode: ACQ
            Aperture: 2.0
          Sp_Element: MIRROR-N1
          Wavelength:
 Optional_Parameters: BRIGHT=RETURN,    ! These are the default 
                      SEARCH-SIZE=3     ! parameters.
Number_of_Iterations: 1
   Time_Per_Exposure: 13.5S            
Special_Requirements: ONBOARD ACQ FOR 2
            Comments: STEP-TIME = 1.5 sec

     Exposure_Number: 2 
         Target_Name: HD12345
              Config: HRS
              Opmode: ACQ/PEAKUP
            Aperture: 0.25
          Sp_Element: MIRROR-N1
          Wavelength:
 Optional_Parameters: SEARCH-SIZE=5    ! Default
Number_of_Iterations: 1
   Time_Per_Exposure: 37.5S
Special_Requirements: ONBOARD ACQ FOR 3-6
            Comments: STEP-TIME = 1.5 sec

     Exposure_Number: 3 
         Target_Name: WAVE
              Config: HRS
              Opmode: ACCUM
            Aperture: SC2
          Sp_Element: ECH-A
          Wavelength: 1404
 Optional_Parameters: SPYBAL=YES
Number_of_Iterations: 1
   Time_Per_Exposure: DEF
Special_Requirements: 
            Comments:

     Exposure_Number: 4 
         Target_Name: HD12345
              Config: HRS
              Opmode: ACCUM
            Aperture: 0.25
          Sp_Element: ECH-A
          Wavelength: 1404
 Optional_Parameters: FP-SPLIT=STD, STEP-PATT=DEF
Number_of_Iterations: 1
   Time_Per_Exposure: 870.4S   
Special_Requirements:          
            Comments:

     Exposure_Number: 5 
         Target_Name: WAVE
              Config: HRS
              Opmode: ACCUM
            Aperture: SC2
          Sp_Element: ECH-A
          Wavelength: 1640
 Optional_Parameters: SPYBAL=YES
Number_of_Iterations: 1
   Time_Per_Exposure: DEF
Special_Requirements: 
Comments:

     Exposure_Number: 6 
         Target_Name: HD12345
              Config: HRS
              Opmode: ACCUM
            Aperture: 0.25
          Sp_Element: ECH-A
          Wavelength: 1640
 Optional_Parameters: FP-SPLIT=STD, STEP-PATT=DEF
Number_of_Iterations: 2
   Time_Per_Exposure: 1523.2S
Special_Requirements: 
            Comments:

Figure 4.2: An acquisition with the FOS blue side followed by a GHRS ACCUM. Note the Special Requirement "SEQ 4-5 NON-INT" for exposure 4. This forces lines 4 and 5 to occur together. Also, because of the acquisition with the FOS, this NON-INT forces a SPYBAL to occur before the WAVE exposure, just as one would wish.

Visits 

        Visit_Number: 1
  Visit_Requirements: 
    On_Hold_Comments:
      Visit_Comments: 

     Exposure_Number: 1              
         Target_Name: NGC1234
              Config: FOS/BL           
              Opmode: ACQ/PEAK         
            Aperture: 4.3            
          Sp_Element: MIRROR
 Optional_Parameters: SEARCH-SIZE-X=1, SEARCH-SIZE-Y=3,
                      SCAN-STEP-Y=1.23 
Number_of_Iterations: 1
   Time_Per_Exposure: 1S
Special_Requirements: ONBOARD ACQ FOR 2   
            Comments: FOS search pattern A

     Exposure_Number: 2       
         Target_Name: NGC1234
              Config: FOS/BL
              Opmode: ACQ/PEAK
            Aperture: 1.0
          Sp_Element: MIRROR
 Optional_Parameters: SEARCH-SIZE-X=6, SEARCH-SIZE-Y=2,
                      SCAN-STEP-X=0.61, SCAN-STEP-Y=0.61 
Number_of_Iterations: 1
   Time_Per_Exposure: 1S
Special_Requirements: ONBOARD ACQ FOR 3
            Comments: FOS search pattern B1

     Exposure_Number: 3
         Target_Name: NGC1234
              Config: FOS/BL
              Opmode: ACQ/PEAK
            Aperture: 0.5              
          Sp_Element: MIRROR
 Optional_Parameters: SEARCH-SIZE-X=3, SEARCH-SIZE-Y=3,
                      SCAN-STEP-X=0.29, SCAN-STEP-Y=0.29 
Number_of_Iterations: 1
   Time_Per_Exposure: 2S
Special_Requirements: ONBOARD ACQ FOR 4-5    
            Comments: FOS search pattern C1       

     Exposure_Number: 4            
         Target_Name: WAVE
              Config: HRS     ! switching to GHRS for science obs
              Opmode: ACCUM
            Aperture: SC2
          Sp_Element: G140L
          Wavelength: 1395
Number_of_Iterations: 1
   Time_Per_Exposure: 1M
 Optional_Parameters: SPYBAL=YES    
Special_Requirements: SEQ 4-5 NON-INT
            Comments: WAVECAL for exposure 5

     Exposure_Number: 5               
         Target_Name: NGC1234
              Config: HRS
              Opmode: ACCUM
            Aperture: 2.0
          Sp_Element: G140L
          Wavelength: 1395
 Optional_Parameters: STEP-PATT=5
Number_of_Iterations: 3
   Time_Per_Exposure: 598.4S
Special_Requirements:                   
            Comments:

Figure 4.3: An IMAGE mode observation in the LSA followed by an ACCUM.

Visits 
      Visit_Number: 1
Visit_Requirements: 
    Visit_Comments:

     Exposure_Number: 1   
         Target_Name: HD123
              Config: HRS        
              Opmode: ACQ        
            Aperture: 2.0
          Sp_Element: MIRROR-N2  
          Wavelength:             
 Optional_Parameters: BRIGHT=RETURN, SEARCH-SIZE=3  !Defaults
Number_of_Iterations: 1          
   Time_Per_Exposure: 1.8S   
Special_Requirements: ONBOARD ACQ FOR 2-4       
            Comments: STEP-TIME=.2S

     Exposure_Number: 2   
         Target_Name: HD123
              Config: HRS        
              Opmode: IMAGE        
            Aperture: 2.0
          Sp_Element: MIRROR-N2  
          Wavelength:             
 Optional_Parameters: DELTA-X=4, DELTA-Y=4,    ! Default parameters
                      NX=16, NY=16 
Number_of_Iterations: 1          
   Time_Per_Exposure: 25.5S 
Special_Requirements:           

     Exposure_Number: 3   
         Target_Name: WAVE
              Config: HRS        
              Opmode: ACCUM      
            Aperture: SC2
          Sp_Element: G160M      
          Wavelength: 1549       
 Optional_Parameters: SPYBAL=YES
Number_of_Iterations: 1          
   Time_Per_Exposure: 1M
Special_Requirements: 
            Comments: 

     Exposure_Number: 4   
         Target_Name: HD123
              Config: HRS        
              Opmode: ACCUM      
            Aperture: 2.0
          Sp_Element: G160M      
          Wavelength: 1549       
 Optional_Parameters: FP-SPLIT=STD, STEP-PATT=DEF
Number_of_Iterations: 1          
   Time_Per_Exposure: 1305.6S          
Special_Requirements: 
            Comments: C IV

Figure 4.4: A combination of ACCUM and RAPID modes.

Visits 
      Visit_Number: 1
Visit_Requirements: CVZ 

     Exposure_Number: 10 
         Target_Name: HD112233
              Config: HRS
              Opmode: ACQ
            Aperture: 2.0
          Sp_Element: MIRROR-N2
          Wavelength:
 Optional_Parameters: BRIGHT=RETURN,       ! Default parameters
                      SEARCH-SIZE=3
Number_of_Iterations: 1
   Time_Per_Exposure: 15.75S
Special_Requirements: ONBOARD ACQ FOR 20-40 

            Comments: STEP-TIME=1.75S; Expected count rate = 525 counts/sec

     Exposure_Number: 20 
         Target_Name: HD112233
              Config: HRS
              Opmode: ACCUM
            Aperture: 2.0
          Sp_Element: G270M
          Wavelength: 2815
 Optional_Parameters: FP-SPLIT=STD, STEP-PATT=5
Number_of_Iterations: 4
   Time_Per_Exposure: 326.4S
Special_Requirements:
            Comments:

     Exposure_Number: 30 
         Target_Name: HD112233
              Config: HRS
              Opmode: RAPID
            Aperture: 2.0
          Sp_Element: G160M
          Wavelength: 1293
 Optional_Parameters: SAMPLE-TIME=0.35,
                      SAA-CONTOUR=DEF
Number_of_Iterations: 1
   Time_Per_Exposure: 1200S
Special_Requirements:   

     Exposure_Number: 40 
         Target_Name: HD112233
              Config: HRS
              Opmode: RAPID
            Aperture: 2.0
          Sp_Element: G160M
          Wavelength: 1432
 Optional_Parameters: SAMPLE-TIME=0.35
Number_of_Iterations: 1
   Time_Per_Exposure: 1200S
Special_Requirements: 

Figure 4.1: - An acquisition of a star into the LSA followed by an SSA peakup and two ACCUMs.
Figure 4.2: - An acquisition with the FOS blue side followed by a GHRS ACCUM. Note the Special Requirement "SEQ 4-5 NON-INT" for exposure 4. This forces lines 4 and 5 to occur together. Also, because of the acquisition with the FOS, this NON-INT forces a SPYBAL to occur before the WAVE exposure, just as one would wish.
Figure 4.3: - An IMAGE mode observation in the LSA followed by an ACCUM.
Figure 4.4: - A combination of ACCUM and RAPID modes.