Applying for Observing Time

The P107 Call for Proposals was suspended
due to the impact of the Covid-19 pandemic
on the La Silla Paranal Observatory.



For information on the current status of operations see:


Telescope time for ESO telescopes on Paranal and La Silla is allocated twice a year in periods of 6 months. Allocation periods run from 1 October through 31 March, and from 1 April through 30 September. Applications for observing time on ESO telescopes may only be submittedvia the p1 interface (instructions can be found here).

You cannot submit proposals for the regular cycles now.
Please wait for the announcement of observing time for P108
which will be released end of February 2021.

For your convenience you can look at the historic period 106 CfP.
The Late Breaking News page contains updates regarding proposal submission.


Up to 5% of the general observing time may be used for Director's Discretionary Time Proposals (DDT proposals). For detailed information about DDT proposals see the separate DDT Proposal page. As of 1 April, 2019 proposals must be submitted via the p1 interface (instructions can be found here).

For sudden astronomical events requiring urgent or even immediate observations, detailed requests can be submitted. A detailed description of ESO's "Target of Opportunity" POLICY (ToO) is given in a separate document. Please read it carefully before submitting any ToO.


Information about Observing Programmes