Some planned IT maintenance activities will take place at ESO between Saturday, 6 December 2025 at 08:00 CET and Sunday, 7 December 2025 at 24:00 CET. During that period, all ESO services such as p2, the User Portal or the Science Archive could be subject to intermittent outages. We apologize for the inconvenience.

Service Mode Policies

The ESO Optical/Infrared Telescopes Science Operations Policies document, approved at the 154^th Council meeting in June 2020, describes the policies applied to the selection of observations, the operations and the data handling of all ESO optical/near-infrared telescopes.

The following pages list science operations policies implementation specific to service mode that have to be considered for the preparation of Phase 2 material and the execution of observations in service mode:

Phase 2 constraints must agree with Phase 1 request.
Phase 2 targets must agree with the ones submitted at Phase 1.
The total execution time must not exceed the time allocated to the observing run.
Policy regarding the OB run-time failure.
Policy regarding the execution of time-critical OBs.

Instrument selector

This page does not contain any KMOS-specific information

This page is valid for all instruments

ESO — Reaching New Heights in Astronomy

Service Mode Policies

Instrument selector