Welcome to the ESO/ST-ECF Science Archive Facility

The ESO/ST-ECF science archive is a joint collaboration of the European Organisation for Astronomical Research in the Southern Hemisphere (ESO) and the Space Telescope - European Coordinating Facility (ST-ECF). ESO observational data can be requested after the proprietary period by the astronomical community. Please read the official ESO Data Access Policy statement for more information. Both the ESO and HST archives are available world-wide. To request data you have to log in to the ESO User Portal. Please acknowledge the use of archive data in your publications.

To browse the contents of the ESO archive, use the main ESO archive query form or the VirGO application.