Science Interest Group
X-Ray
The X-Ray Science Interest Group (XR SIG) serves as an active communication forum for X-Ray astrophysics. XR SIG is open to the scientific community.
About XR SIG
Supporting Mission Studies and Concept Development for Future X-Ray Observatories
The X-Ray Science Interest Group (XR SIG) will provide quantitative metrics and assessments to NASA with regard to future X-Ray observatories.
XR SIG will track and analyze evolving science goals and requirements in X-Ray astronomy, especially as current hot topics evolve. XR SIG will also analyze technology development and prioritization plans and assist the Physics of the Cosmos Program Analysis Group in determining technology needs.
The X-Ray Sky about Supporting Mission Studies and Concept Development for Future X-Ray Observatories
Subscribe to the XR SIG Email List
To join the list, send an email to XRSAG-join@lists.nasa.gov with Subject="join"
To unsubscribe, Send an email to XRSAG-leave@lists.nasa.gov with Subject="leave"
Your email address will be used only for the purpose of subscription to the selected email distribution list. For further information, read the NASA Web Privacy Policy.
X-Ray SIG Chairs
Current Chairs
| Name | Institution | Term |
|---|---|---|
| David Pooley | Trinity University | 2021 – |
| Chien-Ting Chen | USRA / MSFC | 2023 – |
| Breanna Binder | Cal Poly Pomona | |
| Steven Ehlert | MSFC | |
| Scott Randall | CfA | |
| Fabio Pacucci | CfA |
Former Chairs
Former chairs of the X-Ray Science Interest Group (XR SIG) who served on the PhysPAG Executive Committee from 2012 through 2024.
| Name | Institution | SIG | Term |
|---|---|---|---|
| Brian Grefenstette | Caltech | XR SIG / HWO | 2024 |
| Kristin Madsen | UMBC / GSFC | XR SIG | 2021 – 2024 |
| Grant Tremblay | Smithsonian Astrophysical Observatory | XR SIG | 2019 – 2023 |
| Jillian Bellovary | Queensborough Community College | GW SIG / XR SIG | 2019 – 2022 |
| Ryan Hickox | Dartmouth College | XR SIG | 2018 – 2022 |
| John Tomsick | UC Berkeley | GR SIG / XR SIG | 2016 – 2019 |
| Mark Bautz | MIT | XR SIG | 2014 – 2018 |
| Ralph Kraft | SAO | XR SIG | 2016 – 2018 |
| Jay Bookbinder | SAO | XR SIG | 2012 – 2016 |
| John Nousek | Penn State University | XR SIG | 2013–2016 |
News & Events
A TDAMM Mission Concept Offered by the X-ray Timing Science Analysis Group: the Dynamic Extreme Universe in X-rays (DEUS-X) Machine
High Angular Resolution X-ray Imager (Hi-ReX) SAG Report on Extragalactic and Extreme Gravity Science.Speaker: Kimberly Weaver, NASA Goddard Space Flight Center
Developing CMOS Detectors for Use in Future X-ray Astrophysics Missions. Speakers: Sarah Heine and Eric D. Miller
Mission Concepts for the Astrophysics Strategic Technology & Research Accelerator (ASTRA) Initiative. 1:00pm ET
Physics of the Cosmos at the APS Global Physics Summit 2026. The American Physical Society Joint March Meeting and April Meeting
X-Ray SIG Documents
Decadal Survey White Papers Project
Unlocking the Capabilities of Future High-Resolution X-ray Spectroscopy Missions Through Laboratory Astrophysics
Time Domain Studies of Neutron Star and Black Hole Populations: X-ray Identification of Compact Object Types
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