Fermi Summer School will be May 26 to June 5, 2026.
LAT data processing has been paused to complete final tasks for the migration of the Level 1 pipeline to the S3DF facility at SLAC. This is expected to take at least 2-3 days and may take longer if we encounter anything unexpected. The LAT continues to collect science data on orbit; those data will be available after the migration completes and the ground processing has time to catch up. We will provide updates on the progress and expectations for LAT data availability at https://fermi.gsfc.nasa.gov/.
The Fermi Large Area Telescope (LAT) has released an early version of the source list (FL16Y) developed for the upcoming 5FGL catalog of LAT sources. The FL16Y list is based on 16 years of survey data covering gamma-ray energies from 50 MeV to 1 TeV. The list, along with supporting documentation and data products, is available on this web page. Compared to the original 4FGL catalog, this new list uses twice as much data. As a result, the precision of source locations has improved by 24% on average.
Registration is now open for the Fermi Summer School 2026. The application deadline is February 6, 2026. However, we have a limited number of positions at the school and early applications will be favored.
Fermi Observations for MW 929
Mission Week 929 begins with a continuation of the asymmetric +50/-60 deg. profile from the previous week. Then, on DOY 78 (2026-3-19) at 14:50 UT a 10-minute freeze observation occurs during which a +50 deg. modified sine profile is loaded. Next, on DOY 84 (2026-3-25) at 15:37 UT a 10-minute freeze observation occurs during which an asymmetric +50/-60 deg. profile is loaded. This profile continues until the end of the mission week. The survey repeat period INCREASED from 5667s to 5668s. Note that positive rock angles are south, and negative rock angles are north.
The Fermi Science Support Center (FSSC) runs the guest investigator program, creates and maintains the mission time line, provides analysis tools for the scientific community, and archives and serves Fermi data.
Guest Investigator Program - Details of the Cycle 19 Call for Proposals, deadline Jan 29 2026.
Targets of Opportunity (ToO) - How to apply for a ToO.
New Users - Overview of Fermi analysis basics.
Data & Products - Download Fermi data and access data products such as catalogs.
Analysis Tools - Tools from the FSSC and the user community.
Analysis Threads - Step-by-step guides to various types of analyses that you can do with Fermi data.
Multiwavelength Coordination and Existing Data - Links to related datasets and coordination resources.
The Observatory - Key information about Fermi and its capabilities required for analysis.
Research Highlights - Major Fermi research areas and links to publications and press releases.
Transient Science - Resources for transient and time domain science.
Fermi Users' Group - External advisory body that provides input and perspectives from relevant science communities and members to the Fermi Project.
Fermi Summer School - Annual summer school aimed at graduate students and post-doctoral researchers.
Fermi Meetings - Links to summer schools, symposia, and workshops.
News and Mailing List - Sign up for Fermi news and other lists
