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CRIRES:
Reference frames

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Reference Frames
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CRIRES reference frames

The CRIRES reference frames pages offer:

  • example frames for the daily health check settings
  • an atlas of ThAr and N2O wavelength calibration exposures.
Reference frames:

Daily Health Check settings

The following CRIRES calibrations are measured daily independent from the settings used during the night:

  • DARKs: a set of 3 darks for DIT = 1 and DIT = 300 sec
  • FLATs: one flat-field for each for the reference wavelengths 1090.4, 3218.6, and 4302.7 nm
  • WAVEs: a ThAr exposure for 1090.4 nm and a N2O exposure at 4092.9 nm
  • a set of DARKs and FLATs with increasing DIT for assessing detector non-linearity.

DARK reference frames

DIT   1 sec 300 sec
Dark  
raw frames raw raw
headers hdr hdr
masters  
master files   master master

FLAT reference frames

WLEN_REF   1090.4 nm 3218.6 nm 4302.7 nm
DIT   2 sec 2 sec 2 sec
Flat
raw frames raw raw raw
headers hdr hdr hdr
masters  
bad pixel map      
master files   master master master
BPM files     bpm  

WAVE reference frames

WLEN_REF   1090.4 nm 1090.4 nm 4092.9 nm
Opt Elem   ThAr
arc lamp (fibres)
ThAr
arc lamp (w/o fibres)
N2O
gas cell
Wave
raw frames raw raw raw
headers hdr hdr hdr

DETLIN reference frames

DIT   9 sec
Detlin Flat  
raw frames raw
headers hdr
masters   A coeff
B coeff
C coeff
master files   master A
master B
master C

 


 
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