Data Reduction Frequently Asked Questions

What is the best way to reduce my VLT data?

ESO provides pipelines for most of the instrument modes. They can be downloaded from Each instrument pipeline comes as individual “recipes”. There are three ways to run the recipes:

  1. run “esorex” from a command line
  2. use Gasgano graphical user interface
  3. use Reflex workflows.

The most recent and most advanced way of running the pipelines is Reflex. However, only a limited number of instruments are currently supported. We suggest to use Reflex for any instrument that is supported, see the above link. For instrument modes that are not supported by Reflex, we suggest to use Gasgano.