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The HEASARC welcomes your participation in a brief survey to capture how users access and utilize HEASARC data, software, and services. The outcome(s) of this survey will be used to guide, prioritize, and plan our activities and development in the coming years. It contains 20 questions, generally takes just a few minutes to complete, and your answers will remain totally anonymous. The survey is open until Dec 18, 2023. We thank you in advance for your valuable feedback.

XMM-Newton Guest Observer Facility


The Users Group provides guidance to the GOF on issues that affect the community of XMM-Newton users. Scientists and students who use XMM and have questions, complaints, or suggestions for improvements are encouraged to contact any member of the Users Group.

Please note that ESA also has a Users Group, which can have U.S. members. U.S. members of ESA's Users Group (but not GSFC's) can be reimbursed for official travel. Members are gently reminded to please contact the Project Scientist, Dr. Kim Weaver , prior to traveling.


  • Dr. Jimmy Irwin (University of Alabama)


  • Dr. Laura Brenneman (Harvard-Smithsonian Center for Astrophysics)
  • Dr. Marc Gagne (West Chester University of Pennsylvania)
  • Dr. Massimiliano Galeazzi (University of Miami)
  • Dr. Benson Guest (University of Maryland at College Park)
  • Dr. Jules Halpern (Columbia University)
  • Dr. Dacheng Lin (Northeastern University)
  • Dr. Frederick Paerels (Columbia University)
  • Alessandro Peca (University of Miami, student member)
  • Dr. Ming Sun (University of Alabama at Huntsville)
  • Dr. Benjamin Williams (University of Washington)

Ex Officio Members

  • Dr. Richard Mushotzky - ESA Mission Scientist (University of Maryland at College Park)
  • Dr. Frits Paerels - RGS (Columbia University)
  • Dr. Steve Snowden - XMM-Newton Project Scientist Emeritus (NASA/GSFC)

Minutes of meetings

If you have any questions concerning XMM-Newton send e-mail to