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TOPIC: GLAST
Blobrana


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Orbital Marks Second Anniversary of Fermi Gamma-ray Space Telescope Mission

Orbital Sciences Corporation is celebrating the second anniversary of the launch of the Fermi Gamma-ray Space Telescope spacecraft, which has performed flawlessly over the initial two years of its mission to supply scientists with important new data about the nature of the universe. In the second year of operation the spacecraft, which is based on the mid-class low-Earth orbit platform that Orbital recently acquired, established an overall system availability of 100%, providing continuous scientific data and enabling the mission team to lower costs by reducing staff needed for routine spacecraft operations.
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Ed ~ the Delta II 7920-H rocket carrying the GLAST satellite was launched on the 11th June, 2008.

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Blobrana


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NASA's Fermi Probes "Dragons" of the Gamma-ray Sky

One of the pleasures of perusing ancient maps is locating regions so poorly explored that mapmakers warned of dragons and sea monsters. Now, astronomers using NASA's Fermi Gamma-ray Space Telescope find themselves in the same situation as cartographers of old. A new study of the ever-present fog of gamma rays from sources outside our galaxy shows that less than a third of the emission arises from what astronomers once considered the most likely suspects -- black-hole-powered jets from active galaxies.
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Blobrana


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Fermi's New Pulsars Discovery



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Blobrana


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Fermi Space Telescope



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Blobrana


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During its first year of operations, NASA's Fermi Gamma Ray Space Telescope mapped the extreme sky with unprecedented resolution and sensitivity. It captured more than one thousand discrete sources of gamma rays -- the highest-energy form of light. Capping these achievements was a measurement that provided rare experimental evidence about the very structure of space and time, unified as space-time in Einstein's theories.

"Physicists would like to replace Einstein's vision of gravity -- as expressed in his relativity theories -- with something that handles all fundamental forces. There are many ideas, but few ways to test them" - Peter Michelson, principal investigator of Fermi's Large Area Telescope, or LAT, at Stanford University in Palo Alto, California

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Blobrana


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Update:
NASA will hold a news teleconference at 16:00 GMT on Wednesday, Oct. 28, to discuss the first-year science results from the Fermi Gamma-ray Space Telescope. This event replaces the originally scheduled Oct. 29 media conference at NASA Headquarters in Washington.

Source NASA

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Blobrana


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Fermi Gamma-ray Space Telescope news briefing
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NASA will hold a news briefing at 2 p.m. EDT on Thursday, Oct. 29, to discuss the first-year science results from the Fermi Gamma-ray Space Telescope.

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Blobrana


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Researchers are once again proposing that an orbiting telescope may have seen evidence for dark matter - the undetected material that is believed to permeate the Universe.
The Fermi Gamma Ray Space Telescope has captured flashes of high-energy -ray light that might come from dark matter, according to Lisa Goodenough of New York University in New York City and Dan Hooper at the Fermi National Accelerator Laboratory in Batavia, Illinois.
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Blobrana


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Fermi Large Area Telescope
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Fermi Large Area Telescope reveals pulsing gamma-ray sources
Scientists at the Naval Research Laboratory (NRL) Space Science Division and a team of international researchers have positively identified cosmic sources of gamma-ray emissions through the discovery of 16 pulsating neutron stars. Using the Large Area Telescope (LAT), the primary instrument on NASA's Fermi Gamma-ray Space Telescope satellite, the discoveries were made by conducting blind frequency searches on the sparse photon data provided by the LAT. The photons had energies between 20 Mega-electron-volts (MeVs) and 300 Giga-electron-volts (GeVs) -  tens of millions to hundreds of billions of times more energetic than the photons we see with the human eye.
A second study, published at the same time, announced the detection of gamma-ray pulsations from eight Galactic millisecond pulsars (MSPs). Millisecond pulsars spin hundreds of times per second, but have magnetic fields 10,000 times lower than normal pulsars. These discoveries confirm that they, too, can produce powerful gamma-ray emissions.

Source: Naval Research Laboratory


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Blobrana


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Gamma-ray spike in Fermi telescope data hikes anticipation.
The murky hunt for dark matter has just got a little bit brighter. New gamma-ray results from the FERMI telescope fit with previous tantalizing hints of a detection of the mysterious stuff.
Last year, a series of independent experiments caused a stir because they seemed to have detected signals of dark matter, which is believed to make up 85% of the universe's matter.

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