2025 News
Dec 18, 2025
Fermitools 2.5.0 Released
An updated version (2.5.0) of the Fermitools is now available. A large number of changes have been made focusing on resolving issues with dependencies, internal tool testing and validation, and resolving outstanding issues. These changes include packaging a set of external dependencies with the tools for improved build and installation performance, a range of bug fixes and enhancements to backend code, and a complete overhaul of the FSSC build system.
+ Release Notes
Dec 10, 2025
Refreshed Website
A refreshed version of the Fermi website (fermi.gsfc.nasa.gov) went live yesterday. The update enhances navigation, introduces new content, retires outdated pages, and brings the site into alignment with current U.S. government and HEASARC design standards.
If you notice any issues, missing material, or have suggestions for further improvements, please share your feedback using the Google form below. We plan to release another update in February 2026 informed by the community response.
+ https://forms.gle/4AQaPBUoRwzApNcz8
Apr 21, 2025
Fermitools 2.4.0 Released
An updated version (2.4.0) of the Fermitools is now available. Improvements focus on resolving issues with outdated dependencies and improving compatibility (e.g., Astropy). This release also includes a range of bug fixes, enhancements to backend code, and updates to the build system.
+ Release Notes
Feb 6, 2025
Cycle 18 Solicitation Amended
The Fermi Cycle 18 solicitation was amended on February 5 to clarify that the page limit for the Science/Technical/Management section of Phase-1 proposals is four pages for Regular proposals and six pages for Large proposals. These page limits include figures but not references. This is a change from Cycle 17 when the 4- and 6-page limits included references. As a reminder, the solicitation was amended on January 17 to change the proposal due date to March 5, 2025. Full details of the Fermi Cycle 18 solicitation can be found in Roses Appendix D.6
Jan 22, 2025
Fermi Phase 1 Deadline Now 5 Mar 2025
The Phase 1 deadline for the Fermi GI program has been deferred to 5 March 2025. Please see the Cycle-18 call for proposals (ROSES D.6) for details and contact the Fermi Helpdesk with any questions (fermihelp@milkyway.gsfc.nasa.gov).
Jan 6, 2025
LAT Data Processing Restored
LAT data processing was restored over the weekend. It will take another day or more to finish processing the remaining backlog.
Jan 3, 2025
LAT Processing Delay
The LAT data processing pipeline is currently offline due to issues with its computing cluster. The satellite itself is functioning normally. At this time, we do not have an estimated timeline for repairs. The data server does not have any LAT data from after December 30, 2024, and there may be some gaps starting from December 25, 2024. Once the pipeline is restored, it will take several days to catch up and make the data available through the server and in the weekly files. We will provide an update by Monday or sooner if more information becomes available.