XMM-Newton Twenty-fifth Announcement of Opportunity (AO-25)
Anticipated Timeline

 

The Twenty-fifth Announcement of Opportunity (AO-25) is not yet open

The planned key milestones for the twenty-fifth XMM-Newton "Announcement of Opportunity" have been established. Within this AO-25 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-25 are:
  Announcement of Opportunity 19 August 2025
  Due date for Proposals 10 October 2025 (12:00 UT)
  Final OTAC approved programme mid December 2025
     
For approved proposals only:
  Start of Phase II proposal submission 13 January 2026
  Closure of Phase II proposal submission 30 January 2026
  Start of AO-25 observations May 2026