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EnglishWhat is the Fermi Portal at fermi.gsfc.nasa.gov?
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The Fermi Portal at fermi.gsfc.nasa.gov is the official NASA-hosted web portal for the Fermi Gamma-ray Space Telescope, operated through NASA Goddard Space Flight Center. It serves the Fermi science community by publishing mission announcements, data and software releases, user resources, and events. If you are a researcher working with Fermi data, a new user looking for a starting point, an educator, or someone tracking mission status, this site is the authoritative entry point.
Who runs it and what it is for
The portal is a NASA Goddard resource, and its content is organized around the needs of the Fermi user community rather than the general public. The site's own navigation reflects this: it offers distinct entry points for the science community, new users, educators, and those seeking background about the mission.
Its main purpose is to keep the community informed and equipped: announcing software and data updates, flagging data quality issues, and pointing users to the tools and documentation needed to do Fermi analysis.
Main content areas
Announcements
The announcements section carries time-stamped operational and software news. Recent examples from the portal show the kind of information published here:
| Date | Announcement | What it means for users |
|---|---|---|
| July 31, 2026 | Fermitools 2.5.3 released | Updated analysis software with user-reported bug fixes, backend library changes, and a fix for a critical bug in radial gaussian and radial disk source map generation |
| June 5, 2026 | Data quality flag issue in LAT spacecraft file | Flags from data quality monitoring had not propagated into spacecraft files since a March 2026 cluster migration; affected high time resolution analyses |
| March 27, 2026 | Normal LAT data processing fully restored | LAT data processing and deliveries resumed after migration of the Level 1 pipeline to the S3DF facility at SLAC, with the backlog cleared |
These entries are worth checking before starting or repeating an analysis, because they can change whether existing data products are still valid for your purpose.
Events
The portal lists community events, including the Fermi Summer School (scheduled for May 26 to June 5, 2026), which provides training for users of Fermi data and tools.
Audience-specific entry points
The site separates its resources by audience:
- Science Community — access data, tools, and resources for scientific research with Fermi
- New Fermi Users — a starting point for first-time users
- Educators — educational materials and teaching programs
- About Fermi — background on the mission and its discoveries
Practical takeaways
- Treat the announcements section as required reading before high time resolution analyses. The June 2026 data quality flag notice specifically recommends re-downloading spacecraft files and reanalyzing data if your work depends on high time resolution, such as pulsar studies.
- Software versions matter. The Fermitools 2.5.3 release notes describe both bug fixes and dependency changes (including a move from Python 3.11 to 3.12), so confirm your environment matches the version you intend to use.
- If you are new to Fermi, start from the "New Fermi Users" entry point rather than the science community pages, which assume familiarity with the data and tools.
The portal does not present itself as a commercial or subscription service; it is a NASA mission resource. For specifics on data access, tool installation, or event registration, follow the links from the relevant section of the site itself, since those details are maintained there rather than on this overview.