DDT Proposals Resume their Full Scope Following the Closure of Special Call for Period 107

Published: 26 Aug 2021

Following the closure of the Special Call for Period 107 on 1st September 2021, users will again be able to submit Director's Discretionary Time (DDT) proposals belonging to all the categories normally eligible through that channel, and not only for Target-of-Opportunity observations.

DDT proposals must necessarily belong to one of the following categories:

  • Proposals of ToO nature requiring the immediate observation of a sudden and unexpected astronomical event
  • Proposals requesting observations on a hot and highly competitive scientific topic
  • Proposals asking for follow-up observations of a programme recently conducted from ground-based and/or space facilities, where a quick implementation should provide break-through results
  • Proposals of a somewhat risky nature requesting a small amount of observing time to test the feasibility of a programme