A planned IT Maintenance and Release Window is scheduled between
Saturday, 19 July 2025 at 08:00 CEST/02:00 CLT and Sunday, 20 July 2025 at 24:00 CEST/18:00 CLT.
From 08:00 CEST/02:00 CLT on Saturday, all ESO IT services including ERP, Email, Database Management Systems,
the Scientific Archive, the User Portal, and internet connectivity on all ESO sites, may experience intermittent outages.
Full services cannot be guaranteed before Monday, 21 July 2025. We apologize for any inconvenience this may cause.
Service Mode Special Procedures
There are some special procedures for service mode observations in the following cases:
Instrument selector
This page is valid for all instruments