CRIRES:
Reference frames

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.

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

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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

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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

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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