Fermi Gamma-ray Space Telescope

News Archive

Aug 15, 2019

Moon Glows Brighter Than Sun in Images From NASA's Fermi

If our eyes could see gamma rays, the Moon would appear brighter than the Sun! That's how NASA's Fermi Gamma-ray Space Telescope has seen our neighbor in space for the past decade. These gamma-ray observations are a reminder that astronauts on the Moon will require protection from the same cosmic rays that produce this high-energy gamma radiation.
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Aug 5, 2019

Fermi Returns to Normal Operations

Friday night 8/2/19: The Fermi flight operations has returned the observatory to normal sky-survey mode and science operations have been resumed. The situation will continue to be carefully monitored.

Aug 2, 2019

Fermi Spacecraft Anomaly

At 14:33:54 UTC on August 1, Fermi went into Sun point mode following an anomaly. The observatory is safe and the instruments are powered on but are not taking any science data at this time. The investigation into the cause of the anomaly is ongoing.

Aug 1, 2019

NASA Scientist to Discuss "Cosmic Explosions and Cosmic Accelerators" at Library of Congress Lecture

The public is invited to a free lecture called 'Cosmic Explosions and Cosmic Accelerators: Gamma-rays and Multi-messenger Astronomy,' with Dr. Regina Caputo, NASA research scientist. The talk will occur in the Pickford Theater, third floor, Madison Building, 101 Independence Avenue SE, Library of Congress, Washington, D.C., on Thursday, August 8 from 11:30 a.m. to 12:30 p.m. EDT.
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Jul 3, 2019

Release of the Second Fermi LAT GRB Catalog

The second catalog of LAT-detected gamma-ray bursts (GRBs) is now available in a searchable table the HEASARC's Browse interface. The catalog contains 186 GRBs covering the first 10 years of operations, from 2008 August 4 to 2018 August 4.

Jun 13, 2019

NASA's Fermi Mission Reveals its Highest-energy Gamma-ray Bursts

For 10 years, NASA's Fermi Gamma-ray Space Telescope has scanned the sky for gamma-ray bursts (GRBs), the universe's most luminous explosions. A new catalog of the highest-energy blasts provides scientists with fresh insights into how they work.
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Mar 19, 2019

NASA's Fermi Satellite Clocks 'Cannonball' Pulsar Speeding Through Space

Astronomers found a pulsar hurtling through space at nearly 2.5 million miles an hour - so fast it could travel the distance between Earth and the Moon in just 6 minutes. The discovery was made using NASA’s Fermi Gamma-ray Space Telescope and the National Science Foundation's Karl G. Jansky Very Large Array (VLA).
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Mar 11, 2019

Release of the Interstellar Emission Model for the 4FGL Catalog Analysis

As a supplement to the preliminary release of the fourth catalog of Fermi-LAT sources (4FGL), the updated model of interstellar gamma-ray emission that was used for the catalog analysis is also being made available. This new model, gll_iem_v07.fits, is provided as a FITS cube together with a detailed description of the construction of the model, including a set of caveats describing aspects of the model that will be updated in a future release. Accompanying the interstellar emission model are models for the isotropic emission for different LAT response functions and event types. As for the 4FGL catalog, the interstellar emission model and isotropic spectra were developed using Pass 8 P8R3 event selections. You can find more information about the new files on the LAT background models page.

Mar 6, 2019

Ninth International Fermi Symposium

The Ninth International Fermi Symposium will be held at the Misty Hills Conference Centre in Johannesburg, South Africa from March 29 to April 3, 2020. More details will be posted on the symposium website as they become available.

Feb 25, 2019

Preliminary Release of Fourth Catalog of Fermi-LAT Sources

The (4FGL) catalog is based on the first eight years of LAT science data and is the largest and deepest ever in this energy range. It contains 5098 sources of gamma-rays from 50 MeV to 1 TeV. The catalog is provided as a FITS table, and is accompanied by important caveats as well as a draft of the paper describing the details of the catalog preparation. The source list is complete but some additional information will be added in a future, final release, including light curves and a complete set of analysis flags. The final release may also include more or revised information about multiwavelength associations of some sources. This release is being made at this time in support of proposal preparation for the Cycle 12 of the Fermi Guest Investigator program.

Jan 31, 2019

Fermi Cycle-12 Proposal Deadline Update

The proposal deadline for Fermi Cycle-12 stage-1 submissions is now Wednesday, March 20, 2019 at 16:30 EST. The previous deadline has been revised as a result of the recent government shutdown. Additional information is available on the Proposals Page of this website and on NSPIRES in the ROSES NRA, Appendix D.6. Cycle-12 is expected to start on time in August 2019.

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