XMM-Newton are pleased to invite you to respond to the 25" “Announcement of Opportunity" to submit proposals for observations to be performed with the XMM-Newton observatory. This Announcement solicits proposals to be carried out between May 2026 and April 2027. Proposers from institutes located worldwide are welcometo participate. All proposals will be subject to peer review by the XMM-Newton Observing Time Allocation Committee. The detailed schedule of milestones of the announcement, the required software tools and the documentation are available from:

https://www.cosmos.esa.int/web/xmm-newton/ao25