A planned IT Maintenance and Release Window will take place between
Saturday, 12^th October 2024 at 08:00 CEST/03:00 CLST and Sunday, 13^th October 2024 at 24:00 CEST/19:00 CLST.

From 08:00 CEST/03:00 CLST on Saturday all ESO IT services including ERP, Email, Database Management Systems,
the Scientific Archive and Internet connectivity on all ESO sites, could be subject to intermittent outages.
Full services won't be guaranteed before Monday, 14th October 2024. We apologize for any inconvenience caused by this.

Service Mode Special Procedures

There are some special procedures for service mode observations in the following cases:

Director's Discretionary Time (DDT) programmes
Target of Opportunity (ToO) programmes
Rapid Response Mode (RRM) observations
Observations of Moving Targets
Use of special non-ESO user filters

Instrument selector

This page is valid for all instruments

ESO — Reaching New Heights in Astronomy

Service Mode Special Procedures

Instrument selector