CRIRES FLAT 1090.4 nm

The exposure level in CRIRES flats can vary significantly because of the variability of the halogen lamp. Flats for science data should not exceed 10000 ADUs. Please note that detectors 1 and 4 of the 1090.4 nm setting suffer from vignetting and contamination from adjacent orders. Flux level and and visual appearance can vary from one day to the other.

Detector 1

Detector 2

Detector 3

Detector 4