ESO Archive Frequently Asked Questions

CalSelector: How do I trigger the CalSelector tool, i.e. the association of science and calibrations?

As described in Detailed user documentation there are 3 ways to trigger the CalSelector tool: via an archive request, programmatically, or via the new Download Portal. Please note however that, under certain circumstances, CalSelector behaves erratically on request that contain a mixture of science and non-science (e.g. acquisition images) files. We would strongly encourage you to include only science files in the query (e.g. by selecting Science as Category in the main query interface) and let CalSelector associate the other relevant files.