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XMM-Newton Guest Observer Facility



New expenses are now eligible to receive funding! Please read the "Important Notes and Guidelines for AO-21 Budget Proposals" section below very carefully.


Do you have an XMM grant and are you moving to a new institution? If so, please be aware that you need to contact the NASA Technical Officer as soon as possible to make sure you can take your money with you! Click here for more information.

Note that final reports for XMM-Newton GO grants are required upon completion of the grant award period. Additional instructions for submitting final grant recipient reports, as well as a required form, can be found here. Yearly progress reports are also required.

Do you need to request a No Cost Extension (NCE) on an XMM grant? Click here!

The AO-21 Call For Budget Proposals


Thursday, 12 May 2022 Release of AO-21 NASA GO Budget Announcement (managed by the GSFC GOF)
FRIDAY, 24 JUNE 2022 at 5:30 PM EDTClosure of AO-21 Budget Submission Process
August 2022 Results of AO-21 Budget Process Announced

AO-21 Budget Proposal Information:

AO-21 funding through the GOF is available for US PI XMM science proposals accepted at the A or B levels. Some funding is also available for proposals at the C level. Qualifying PIs are being/will be notified.

For the analysis of XMM data which are no longer proprietary, funding proposals may be submitted through the ADAP. Data which are still proprietary are not eligible for funding through the ADAP.

NASA has released a call for budget proposals (the generic version can be found here) in support of accepted XMM-Newton AO-21. The budget process is open only to guest observers who are employed by U.S. institutions during the periods of performance of the investigations.

The current schedule for the review of the budget proposals is listed above. Note, however, that the dates of events are subject to change.

Useful pages and sites:


Important Notes and Guidelines for AO-21 Budget Proposals:

  • Proposals for PIs with A/B-ranked targets, and for PIs with C-ranked targets who have received notification from the GOF that they may submit a proposal, are submitted via NSPIRES. All budget proposal PIs must be registered users, and information on registering is here. A step-by-step guide on how to make the Proposal Cover Page in NSPIRES is here. Please make sure to start early if you are not already familiar with NSPIRES!

  • New! We are living in a new post-pandemic(?) world, and this brings new challenges and uncertainties to how members of the science community transmit their findings to colleagues and organize their collaborations. While much of the country is reopening, new covid variants are being identified and major cities are reissuing mask mandates and other restrictions to slow its spread. Virtual or hybrid meetings and collaborative groups are almost certain to remain common for the next year, and perhaps much longer. In light of this, the GOF is offering grant awardees the option of requesting funds to support home/home office internet access upgrades and hardware and software applications that facilitate virtual meetings and collaborations. This could be something like a high-end web camera, a Slack Pro workspace, a Zoom Room virtual workspace, and upgraded internet capability for the duration of the grant. Please note that is not to support basic internet access itself; this is to upgrade a currently-existing plan to one with the higher bandwidth needed to accommodate virtual meetings and collaborations. PIs may request funding for both an improved virtual experience and in-person travel. Specific costs must be listed, and a basis for the costs must be provided.
  • NSPIRES will require you to enter budget numbers and answer standard questions. You must enter your original proposal title and proposal number. In addition, you must provide the original abstract of your science proposal in the "proposal summary" field.

    A complete submission also requires the following documents to be uploaded. The first, combined into a single PDF file, contains your budget justification narrative, the original science justification from your ESA observing propsal, and the CV and Current and Pending Support of the PI. The second PDF contains the signed certification form.

  • PIs with split positions between US and foreign institutions must specify in the budget narrative the distribution of time that they spend at the two institutions. Also, the employment with the US institution should be expected to continue through the funding cycle.
  • In addition, NASA funds may not be used to travel between the two institutions. For example, NASA funds may not be used for travel to a European conference or collaboration where the PI uses other funds to travel to his/her European institution.
  • There is one assurance certification form that is required for processing of government grants. It contains all the relevant statements of assurance, including those regarding lobbying, federal tax liabilities, and corporate felonies, among others. It also states that no funds may be used to further any collaborations with Chinese organizations. While institutions can attest to this in NSPIRES when they submit a proposal, proposers are strongly encouraged to submit the signed certification document anyway to be certain that all relevant parties will see it. The form can be found here.
  • Charging of a home/home office basic internet connection to the grant is not allowed. However, charging of a home/home office internet connection upgrade is allowed.
  • Charging of professional association dues (e.g., AAS dues) to the grant is not allowed.
  • Charging of travel expenses of foreign Co-Is to the grant is not allowed (e.g., you can't bring your European colleague to the US for the collaboration).
  • CV's are required. The CV must also include a list of at least your most recent and important publications.
  • For any requested travel, specific costs must be listed in the budget justification, even if the event is subject to change. Example: 2023 Summer AAS meeting, Albuquerque, NM, Airfare $XXX, Hotel $XXX, Registration $XXX, Board $XXX, Ground Transportation $XXX, Incidentals $XXX.
  • For any requested home internet access upgrade and virtual meeting/collaboration hardware and applications, specific costs must be listed in the budget justification. If using the upgraded internet connection to access a virtual meeting, specify which meeting it is. Example: High-end web camera for virtual collaboration: $XXX. Slack Pro channel for 1 year, for a collaboration of N people: $XXX. Internet upgrade from basic plan ($XX/month) to highest residential tier ($XX/month) for 1 year: $XXX; attending the 20th Divisional HEAD meeting (26-30 March 2023) virtually.
  • Suggestions for concatenating PDF files are reproduced here from the RPS website.

    Q: How do I concatenate two or more PDFs into a single PDF in order to satisfy the file upload requirements for proposal submission?

    If you have multiple documents that need to be combined in order to create a single PDF, here are some suggestions: First, if the documents are not already in PDF format, it's best to combine them in some word processor first before generating your PDF. If that's not possible, then you will need to use some software to concatenate PDFs. There are many free software packages available for doing this. We recommend doing a web search for the latest information, but here are some possibilities:

Help Desks

The XMM-Newton Helpdesk at the SOC provides a web-based tool to send technical queries to mission specialists and programmers, and also search the Helpdesk archive.

Mail the XMM-Newton US GOF directly at for all other XMM-Newton questions. Questions regarding funding and assistance in proposal submission may be addressed to Dr. Kim Weaver (

Download the Adobe Acrobat (PDF) Reader.
If you have any questions concerning XMM-Newton send e-mail to