Large Area Telescope First Year Data Released

August 27, 2009 by Kelen Tuttle
This all-sky view from the Fermi telescope reveals bright emission in the plane of the Milky Way (center), bright pulsars and super-massive black holes. (Image: NASA/DOE/International LAT Team.)

( -- Ever since the Large Area Telescope launched aboard the Fermi Gamma-ray Space Telescope in June 2008, the LAT team has been analyzing data, searching for answers to some of the most pressing questions in astrophysics. Now everyone else can join in.

Today, the collaboration and the Fermi mission makes the first year of LAT gamma-ray data publicly available.

"This is a way of maximizing the scientific return from the mission," said Fermi Project Scientist Julie McEnery. "There is a very large number of scientists in the community with very good ideas of what to do with this data. By sharing it among a large group of people, we really get a lot more."

To ensure that others in the astrophysics community can take full advantage of the data, the LAT collaboration, working with the Fermi Science Support Center at NASA Goddard Space Flight Center, has spent a considerable amount of time preparing for the release.

"It took significant effort both on our side and the Goddard side to both get the data out and to get it out in a form that's usable by the whole community," said Astrophysicist Jim Chiang, LAT Collaboration member who works on the analysis software for FGST.

The data set released today includes more than 150 million detected . In contrast, in the more than nine years that the LAT's predecessor, EGRET, operated, it collected 1.4 million gamma rays. In all, the LAT has collected more than 100 times as many photons in about one-tenth the time.

As in all experiments, Chiang said, LAT data are unique to the instrument and require unique software. With this in mind, the collaboration will also make available high-level software that other researchers will need in order to analyze the data. In addition, NASA is offering further resources and funds to guest investigators who successfully submit proposals.

"We can see both from the large number proposals submitted to the guest investigator program and the large number of references in papers that the community is excited about the data," McEnery said.

LAT Principal Investigator Peter Michelson added: "The LAT team has made significant discoveries and significant progress in many areas. I expect that the collaboration will continue to come out with the most results, but I also expect others to make discoveries. Releasing this data is good for the project, good for the collaboration, and good for science."

More information:

Provided by SLAC National Accelerator Laboratory (news : web)

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2 / 5 (4) Aug 27, 2009

Long-term the importance of reliable gamma-ray data for astrophysics cannot be overstated. Gamma rays come from the nucleus, and nuclear forces power the cosmos.

The late Nobel Laureate Willie Fowler understood this fact, but it seems at times that others mistakenly believe that cosmic events can be deciphered without first understanding the n-n, n-p, and p-p interactions between neutrons and protons in the nucleus. See, for example, "Neutron repulsion confirmed as energy source", Journal of Fusion Energy 20 (2003) 197-201:

With kind regards,
Oliver K. Manuel
5 / 5 (2) Aug 28, 2009
Gamma rays come from the nucleus, and nuclear forces power the cosmos.

Or how about the source for a LOT of the gamma rays. Electron positron annihilation. Or gamma ray bursts from hydrogen piling up on neutron stars the fusing in a massive explosion that apparently destroys the neutron star.

So much for a hydrogen layer on top of neutron stars as you insist is the case. That is when you aren't insisting its iron stars. Is this why you keep switching between the two?


Sorry for the new signature. But It Needed Killun.

From QubitTamer's fake profile

Quantum Physicist, torturer of AGW religious zealots like Ethelred because i laugh at his hysterics.

Qubitwit gets the rest of August in my signature for aiming his idiocy at me. Again.
2 / 5 (4) Aug 28, 2009

For empirical evidence of this fact, see the "Dialogue With A Geologist" on the Naked Scientists Discussion Forum and links there:

Page 7: or

Page 8: or

PAGE 9: or
5 / 5 (2) Aug 28, 2009
You don't have any evidence for that that.

Or have you found evidence that neutrons will spontaneously fission when they are NOT free. Without that you have NO evidence.

You do know that he isn't on that site anymore don't you. The geologist that is.

There is no more evidence there now than there was before. Just the same stuff you have in your papers which don't have evidence of neutrons behaving the way you claim.


Sorry for the new signature. But It Needed Killun.

From QubitTamer's fake profile

Quantum Physicist, torturer of AGW religious zealots like Ethelred because i laugh at his hysterics.

Qubitwit gets the rest of August in my signature for aiming his idiocy at me. Again.

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