FLAMES GIRAFFE image flat calibrations

These data are created by the technical template tec_ccdflat, about once a month. They come as a set of flat lamp exposures of the CCD, without the fibre system. The set consists of twins with exposure times starting at 0.5 seconds, up to 220 seconds. These data are analyzed by a QC script and deliver detector characterization parameters like CONAD, fixed-pattern noise and contamination.

This image flat shows no contamination.