Data Reduction Frequently Asked Questions
I derived quantities related to the performance of an instrument. How do I know whether these numbers are "normal"?
The quality control group at ESO monitors a variety of instrument parameters such as zeropoints, efficiencies, read-out noise, etc. These measurements can be plotted or listed at http://archive.eso.org/bin/qc1_cgi?action=qc1_browse_instrume.
A description of the parameters that are regularly trended is available for each instrument at