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X-ray Science Interest Group

The goal of the X-ray Science Interest Group (XR SIG) is to provide quantitative metrics and assessments to NASA in regard to future X-ray observatories. Specifically, the XR SIG will

  • Track and analyze evolving science goals and requirements in X-ray astronomy, especially as current "hot" topics evolve.
  • Provide an active communication forum for X-ray astrophysics (e.g., via town hall meetings at venues such as AAS and APS meetings).
  • Support mission studies and concept development for future X-ray observatories.
  • Analyze technology development and prioritization plans with respect to redefined science goals and the evolution of mission concepts (i.e., the XR SIG will aid the PhysPAG in analyzing technology needs).
  • The XR SIG is open to all members of the community.

    If you are interested in contributing to the work of the XR SIG, please subscribe using the link below. For other inquiries, e-mail co-Chairs Grant Tremblay (Smithsonian Astrophysical Observatory) at grant.tremblay@cfa.harvard.edu, David Pooley (Trinity University) at dpooley@trinity.edu, Kristin Madsen (NASA/GSFC) at Kristin.c.madsen@nasa.gov, and Chien-Ting Chen (USRA/MSFC) at ctchen@usra.edu.

    XR SIG Mailing List

    Subscribe to the XR SIG mailing list.

    White Papers for Decadal Survey

    A list of submitted X-ray Science white papers can be found here: https://pcos.gsfc.nasa.gov/sigs/xrsig/whitepapers.php


  • X-ray SIG white paper: "The Scientific Significance of the Soft X-ray Spectrometer" [PDF]
  • Meetings

  • Upcoming Meetings

  • Previous Meetings
  • Previous XR SIG Chairs

    Jillian BellovaryQueensborough Comm. Coll.GW SIG / XR SIG2019–2022
    Ryan HickoxDartmouth CollegeXR SIG2018–2022
    John TomsickUC BerkeleyGR SIG / XR SIG2016–2019
    Mark BautzMITXR SIG2014–March 2018
    Ralph KraftSAOXR SIG2016–2018
    Jay BookbinderSAOXR SIG2012–2016
    John NousekPenn State Univ.XR SIG2013–2016

    JAXA, NASA XRISM Mission Ready for Liftoff

    XRISM launched successfully on Wednesday, Sept. 6, 2023, at 7:42 p.m. EDT (Thursday, Sept. 7, 8:42 a.m. in Japan). The spacecraft separated from the rocket at 7:56 p.m. EDT.Read more.

    PhysCOS News

    See our new Events Calendar

    Program News and Announcements

  • Sign up for PhysCOS News and Announcements

  • 21 September 2023
    AWESOM SAG Meeting 22 September 2023 »  Details.
    21 September 2023
    Open Source Science Data Repositories Workshop 27-29 September 2023 »  Details.
    21 September 2023
    Astrophysics Advisory Committee (APAC) Meeting 19-20 October 2023 »  Details.
    13 September 2023
    2023 Astrophysics Probe Explorer Announcement of Opportunity: Revisions »  Details.
    13 September 2023
    IXPE General Observer Cycle 1 Notice of Intent Due 18 September 2023 »  Details.
    13 September 2023
    INTEGRAL's Final Call for Guest Observing Time, AO-21, is Open »  Details.
    13 September 2023
    JWST Calibration Workshop: November 14 – 17, 2023 »  Details.
    6 September 2023
    Special Announcement About the Habitable Worlds Observatory START and TAG Teams »  Details.
    5 September 2023
    XRISM Launch Rescheduled for This Week »  Details.
    5 September 2023
    SMD Bridge Program Seed Funding Announcement of Opportunity Still Open »  Details.
    5 September 2023
    ROSES-23: D.13 Astrophysics Pioneers Not Solicited This Year »  Details.
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