XMM-Newton Twenty-third Announcement of Opportunity (AO-23)
Anticipated Timeline


The Twenty-third Announcement of Opportunity (AO-23) is not yet open

The planned key milestones for the twenty-third XMM-Newton "Announcement of Opportunity" have been established. Within this AO-23 a new call to submit proposals for observations to be performed with the XMM-Newton observatory will be issued.

To be prepared for this, please find below the anticipated timeline:

The planned key milestones for AO-23 are:
  Announcement of Opportunity 17 August 2023
  Due date for Proposals 6 October 2023 (12:00 UT)
  Final OTAC approved programme mid December 2023
For approved proposals only:
  Start of Phase II proposal submission 9 January 2024
  Closure of Phase II proposal submission 2 February 2024
  Start of AO-23 observations May 2024

The official "Announcement of Opportunity" will be made public in the XMM-Newton News and on the XMM-Newton Science Operations Centre Home Page.