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Calibrations

, Updated

Please find more on Baseline Calibrations on the NIR instruments resources.


Recommended GCAL configurations and Exp. Times for F2 calibrations:
Quartz Halogen flats and Ar Arcs


Note the following:


GCALflats

All GCALflats are taken with:

  • GCALdiffuser=IR
  • Calibration Lamp = IR greybody - high



GCALflat configurations for Imaging
Filter GCAL Filter Calibration Shutter Exp. Time (sec) Peak Counts
Y ND4.0 Open 20
Y ND4.0 Closed 20
J-low ND4.0 Open 3
J-low ND4.0 Closed 3
J ND4.5 Open 60
J ND4.5 Closed 60
H ND4.5 Open 3
H ND4.5 Closed 3
Ks ND2.0 Open 6



GCALflat configurations for Longslit or MOS
GRISMs: JH (R1200) HK (R1200) R3000
Grism + Filter Slit width (pixel) GCAL filter Exp. Time (sec) Plots
JH (R1200) + JH 1 ND2.0 15
JH (R1200) + JH 2 ND2.0 8 plot
JH (R1200)+ JH 3 ND2.0 5
JH (R1200) + JH 4 ND2.0 4   plot
JH (R1200) + JH 6 ND2.0 3
JH (R1200) + JH 8 ND2.0 2   plot
HK (R1200) + HK 1 ND2.0 8
HK (R1200) + HK 2 ND2.0 4   plot
HK (R1200)+ HK 3 ND2.0 3
HK (R1200) + HK 4 ND4.5 80   plot
HK (R1200) + HK 6 ND4.5 50
HK (R1200) + HK 8 ND4.5 40   plot
R3000 + J-low 1 ND2.0 30
R3000 + J-low 2 ND2.0 16
R3000 + J-low 3 ND2.0 10
R3000 + J-low 4 ND2.0 8
R3000 + J-low 6 ND2.0 6
R3000 + J-low 8 ND4.5 4
R3000 + J 1 ND2.0 30
R3000 + J 2 ND2.0 16
R3000 + J 3 ND2.0 10
R3000 + J 4 ND2.0 8
R3000 + J 6 ND2.0 6
R3000 + J 8 ND4.5 4
R3000 + H 1 ND2.0 16
R3000 + H 2 ND2.0 8   plot
R3000 + H 3 ND2.0 6
R3000 + H 4 ND4.5 160
R3000 + H 6 ND4.5 100
R3000 + H 8 ND4.5 80
R3000 + Ks 1 ND2.0 10
R3000 + Ks 2 ND2.0 8   plot
R3000 + Ks 3 ND2.0 6
R3000 + Ks 4 ND4.5 160
R3000 + Ks 6 ND4.5 100
R3000 + Ks 8 ND4.5 80


GCAL Ar Comparison Lamps

All Ar are taken with:

  • GCALlamp=Ar
  • GCALdiffuser=IR
  • GCALfilter = NIR balance
  • Calibration Shutter = Closed (refers to GCAL flat source)
GCAL Ar configurations for Longslit or MOS
GRISMs: JH (R1200) HK (R1200) R3000
Grism + Filter Slit width (pixel) GCAL filter Exp. Time (sec) Peak Counts
JH (R1200) + JH 1 NIR balance 30
JH (R1200) + JH 2 NIR balance 30
JH (R1200)+ JH 3 NIR balance 15
JH (R1200) + JH 4 NIR balance 15
JH (R1200) + JH 6 NIR balance 8
JH (R1200) + JH 8 NIR balance 8
HK (R1200) + HK 1 NIR balance 90
HK (R1200) + HK 2 NIR balance 90
HK (R1200)+ HK 3 NIR balance 90
HK (R1200) + HK 4 NIR balance 40
HK (R1200) + HK 6 NIR balance 40
HK (R1200) + HK 8 NIR balance 40
R3000 + J-low 1 NIR balance 60
R3000 + J-low 2 NIR balance 60
R3000 + J-low 3 NIR balance 30
R3000 + J-low 4 NIR balance 30
R3000 + J-low 6 NIR balance 15
R3000 + J-low 8 NIR balance 15
R3000 + J 1 NIR balance 60
R3000 + J 2 NIR balance 60
R3000 + J 3 NIR balance 30
R3000 + J 4 NIR balance 30
R3000 + J 6 NIR balance 15
R3000 + J 8 NIR balance 15
R3000 + H 1 NIR balance 180
R3000 + H 2 NIR balance 180
R3000 + H 3 NIR balance 180
R3000 + H 4 NIR balance 80
R3000 + H 6 NIR balance 80
R3000 + H 8 NIR balance 80
R3000 + Ks 1 NIR balance 180
R3000 + Ks 2 NIR balance 180
R3000 + Ks 3 NIR balance 180
R3000 + Ks 4 NIR balance 80
R3000 + Ks 6 NIR balance 80
R3000 + Ks 8 NIR balance 80