Joint Programme submissions totaled 114 proposals: XMM–NuSTAR: 43 XMM–HST: 15 XMM–SWIFT: 19 XMM–VLT: 10 XMM–Chandra: 10 XMM–JWST: 19 XMM–NRAO: 12 XMM–XRISM (new): 9

Proposal breakdown: Large Programmes: 45 proposals Fulfil Programmes: 13 proposals Anticipated Target of Opportunity observations: 81 proposals

Proposals were submitted by 375 different Principal Investigators from 42 countries. Including co-investigators, approximately 1,700 individual scientists participated in the response the 25th AO. Some numbers follow.

This marks a significant increase in over-subscription compared to recent years. The rise is primarily due to reduced available observing time, driven by operational constraints such as increased expected radiation levels and the ongoing evolution of the spacecraft’s orbit.

The 25th AO for XMM-Newton closed on the 10 October 2025. A total of 463 valid proposals were received, which covers a one-year period of 10 Ms of observing time available. In contrast, 85.6 Ms of science time were requested, resulting in an over-subscription factor of 8.6.

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ESAC Open Day (4th of oct 2025) website public registration is now open. If you are around Madrid, we will be showing the XMM-Newton operations room. XMM-Newton The Black Hole Hunter https://t.co/L07upukXFS

........ back from Apollo 15 to the 2030s and beyond !

Erik’s main research interests are in the realm of transient and explosive X-ray phenomena in the universe. Erik is looking forward to continue writing the success story that is X-ray astronomy with XMM-Newton, allowing scientific discoveries spanning many decades, ........

As of 8 Sept 2025, Erik Kuulkers is leading XMM-Newton as Project Scientist, taking this role over from Norbert Schartel. Since 2013, Erik has been Project or Study Scientist for various missions, including Einstein Probe, Theseus, NewAthena, and, for over 10 years, INTEGRAL.

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☀️ Elche is very close to Alicante (and its international airport) in the south of Spain, and June is a great time for a few relaxing days at the beach after the conference!

We're happy to announce The X-ray Universe 2026, to be held June 8-11 2026 in Elche (Spain), organized by the XMM-Newton SOC; https://t.co/U0Mt0uXytb More information to come in due time, but mark your calendars :)

New long-period radio transient discovered. An international team of astronomers reports the discovery of a new long-period radio transient, which received the designation ASKAP J144834−685644 (ASKAP J1448−6856 for short). https://t.co/23nQaPJsYU

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Astronomers investigate pulsar PSR J1930+1852 and its pulsar wind nebula. Results of the observational campaign, published in The Astrophysical Journal, yield more insights into the PWN and the pulsar that powers it. https://t.co/74ztJLUNJu

NASA supports the U.S. scientific community’s use of XMM-Newton and funded elements of its instrument package. These animations showcase the spacecraft in celebration of its 25th year of operations. https://t.co/V0yGpaEQ9Z

XMM-Newton spacecraft animations. ESA's X-ray Multi-Mirror Mission, better known as XMM-Newton, is a space observatory with X-ray and optical/ultraviolet telescopes that studies a wide variety of objects, from distant galaxy clusters to planets in our solar system.

NASA shares new views of our galactic neighbor, Andromeda. This new composite image contains data of M31 taken by some of the world's most powerful telescopes in different kinds of light, revealing new information about our close galactic relative. https://t.co/a2YuNq3SWz