Fermi Gamma-ray Space Telescope

News Archive

May 19, 2022

Fermi Cycle-15 GI Selected Programs Announced

The stage-I selection process for the Fermi Cycle-15 Guest Investigator program has been completed. There were a total of 34 new programs selected for stage I out of 80 proposals submitted. A list of the selected programs, including the PIs, titles and abstracts is available on the FSSC web site.

Apr 15, 2022

LAT GRB Catalog Update

The Second LAT GRB catalog in HEASARC's Browse system has been updated to add LAT detected GRBs that occurred after the publication of the paper in 2018. They were analyzed using the same procedure as the original catalog. The catalog will be updated periodically with new GRBs.

Apr 7, 2022

NASA's Fermi Hunts for Gravitational Waves From Monster Black Holes

Our universe is a chaotic sea of ripples in space-time called gravitational waves. Astronomers think waves from orbiting pairs of supermassive black holes in distant galaxies are light-years long and have been trying to observe them for decades, and now they're one step closer thanks to NASA's Fermi Gamma-ray Space Telescope.
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Mar 14, 2022

Data Server Moved to Faster Hardware

On March 14 2022, the LAT data server transitioned to new hardware, which is the first major hardware update since launch. Queries should be much faster (around 6 times faster on average). The limiting factor is copying the resulting files over the GSFC network to the publicly available site where they can be downloaded. The entire LAT data set was ingested into the new server using the new routines that are more efficient. If you have a job that regularly downloads the weekly files (e.g., using rsync), it may see all the weekly files as updated and download them all again. The difference between the old and new weekly files are minor. You can see a list of differences here. If you encounter any issues, please email the FSSC's helpdesk at: fermihelp@milkyway.gsfc.nasa.gov.

Jan 28, 2022

Third Incremental Release of the Fourth Fermi LAT Source Catalog

We are pleased to announce that the Large Area Telescope Collaboration has released 4FGL-DR3, an incremental version of the fourth full catalog of LAT sources, based on 12 years of survey data in the 50 MeV-1 TeV energy range. In this third data release, the number of sources increased from 5787 in 4FGL-DR2 with 10 years of data to 6658 in 4FGL-DR3 with 12 years of data. The DR3 analysis fits more sources with curved spectra, it introduces a more robust spectral parametrization for pulsars, and the spectral points are extended to 1 TeV. See the DR3 paper and the 4FGL paper for the full details.

Jan 25, 2022

Fermi Cycle 15 Proposal Deadline is Approaching

The deadline for Fermi Cycle-15 Guest Investigator proposals is fast approaching: Feb 17, 2022, 16:30 EST. To help you in preparing your proposals, the Fermi Science Support Center will host a virtual workshop on Jan. 28, at 13:00 EST. We will provide information on proposal submission and evaluation processes, as well as the latest news on Fermi.

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