Fermi Gamma-ray Space Telescope
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Fermi Reveals New Source of Gamma Rays
These images show Fermi data centered on each of the four gamma-ray novae observed by the LAT. Colors indicate the number of detected gamma rays with energies greater than 100 million electron volts (blue indicates lowest, yellow highest).
These images show Fermi data centered on each of the four gamma-ray novae observed by the LAT. Colors indicate the number of detected gamma rays with energies greater than 100 million electron volts (blue indicates lowest, yellow highest).
Image Credit: NASA/DOE/Fermi LAT Collaboration
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What is Fermi?

General Dynamics C4 Systems - Artist Concept of Fermi The Universe is home to numerous exotic and beautiful phenomena, some of which can generate almost inconceivable amounts of energy. Supermassive black holes, merging neutron stars, streams of hot gas moving close to the speed of light ... these are but a few of the marvels that generate gamma-ray radiation, the most energetic form of radiation, billions of times more energetic than the type of light visible to our eyes. What is happening to produce this much energy? What happens to the surrounding environment near these phenomena? How will studying these energetic objects add to our understanding of the very nature of the Universe and how it behaves?

The Fermi Gamma-ray Space Telescope, formerly GLAST, is opening this high-energy world to exploration and helping us answer these questions. With Fermi, astronomers at long last have a superior tool to study how black holes, notorious for pulling matter in, can accelerate jets of gas outward at fantastic speeds. Physicists are able to study subatomic particles at energies far greater than those seen in ground-based particle accelerators. And cosmologists are gaining valuable information about the birth and early evolution of the Universe.

For this unique endeavor, one that brings together the astrophysics and particle physics communities, NASA has teamed up with the U.S. Department of Energy and institutions in France, Germany, Japan, Italy and Sweden. General Dynamics was chosen to build the spacecraft. Fermi was launched June 11, 2008 at 12:05 pm EDT.

Latest News

Mar 9, 2015

Aperture Photometry Light Curves for LAT 3FGL Catalog Sources

Aperture photometry light curves of all 3FGL sources with 30 day time resolution, together with power spectra of these, are now available. These will normally be updated weekly. In addition, results of an automatic search for flaring 3FGL sources are also provided with weekly updates. Light curves and power spectra are here. Flaring sources are here.

Feb 26, 2014

Production of CTTE Data Resumed

The GBM team has resumed production of continuous Time-Tagged Event (CTTE) data and nominal operations.

Feb 23, 2015

CTTE Data Temporarily Disabled

The GBM team has temporarily disabled the production of continuous Time-Tagged Event (CTTE) data and will produce TTE data only when in triggered mode.
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