Twenty-first Announcement of Opportunity (AO-21)
AO-21 Milestones


The Twenty-first Announcement of Opportuninty (AO-21) is not yet open


ISOC is preparing the next call for proposals requesting INTEGRAL observing time. The AO-21 release will be already on 4 September, with a deadline on 29 September 2023. The AO-21 cycle of observations is foreseen to begin on 1 January 2024 and has the usual duration of 12 months.




Release of AO-21: Call for observing time proposals   4 September 2023
Deadline for submission of observing time proposals   29 September 2023 (14:00 CEST)
Meeting of the Time Allocation Committee (TAC)   24-26 October 2023
Start AO-21 cycle of observation (duration 12 months)   1 January 2024


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