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.