Results 21 to 30 of about 26,003 (179)

Fermi Gamma-ray Space Telescope: high-energy results from the first year [PDF]

open access: yesReports on Progress in Physics, 2010
The Fermi Gamma-ray Space Telescope (Fermi) was launched on 11 June 2008 and began its first year sky survey on 11 August 2008. The Large Area Telescope (LAT), a wide field-of-view pair-conversion telescope covering the energy range from 20 MeV to more ...
P. Michelson, W. Atwood, S. Ritz
semanticscholar   +4 more sources

The Fermi Gamma-Ray Space Telescope Discovers the Pulsar in the Young Galactic Supernova Remnant CTA 1 [PDF]

open access: yesScience, 2008
Energetic young pulsars and expanding blast waves [supernova remnants (SNRs)] are the most visible remains after massive stars, ending their lives, explode in core-collapse supernovae. The Fermi Gamma-Ray Space Telescope has unveiled a radio quiet pulsar
A. Abdo   +184 more
semanticscholar   +9 more sources

FERMI GAMMA-RAY SPACE TELESCOPE OBSERVATIONS OF GAMMA-RAY OUTBURSTS FROM 3C 454.3 IN 2009 DECEMBER AND 2010 APRIL [PDF]

open access: yesThe Astrophysical Journal, 2010
The flat spectrum radio quasar 3C 454.3 underwent an extraordinary outburst in 2009 December when it became the brightest γ-ray source in the sky for over 1 week.
M. Ackermann   +154 more
semanticscholar   +10 more sources

Multichannel Poisson denoising and deconvolution on the sphere: application to the Fermi Gamma-ray Space Telescope [PDF]

open access: yesAstronomy & Astrophysics, 2012
A multiscale representation-based denoising method for spherical data contaminated with Poisson noise, the multiscale variance stabilizing transform on the sphere (MS-VSTS), has been recently proposed.
J. Schmitt   +4 more
semanticscholar   +6 more sources

A 34.5 day quasi-periodic oscillation in γ-ray emission from the blazar PKS 2247–131 [PDF]

open access: yesNature Communications, 2018
PKS 2247–131 is an active galaxy that has been emitting gamma-ray flares since October 2016. Here, the authors used data obtained with the Fermi Gamma-ray Space Telescope to find that PKS 2247–131 presents a relatively short, month-like flux oscillation ...
Jianeng Zhou   +7 more
doaj   +2 more sources

Source detection using a 3D sparse representation: application to the Fermi gamma-ray space telescope [PDF]

open access: yesAstronomy & Astrophysics, 2009
The multiscale variance stabilization Transform (MSVST) has recently been proposed for Poisson data denoising. This procedure, which is nonparametric, is based on thresholding wavelet coefficients. We present in this paper an extension of the MSVST to 3D
Jean-Luc Starck   +4 more
semanticscholar   +7 more sources

Interpretation and implications of the non‐detection of GeV spectrum excess by the Fermi Gamma‐ray Space Telescope in most gamma‐ray bursts [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2009
Since the launch of the Fermi Gamma-ray Space Telescope on 2008 June 11, significant detections of high-energy emission have been reported only in six gamma-ray bursts (GRBs) until now.
Yizhong Fan
semanticscholar   +7 more sources

Fermi Gamma-Ray Space Telescope [PDF]

open access: yesOptical Engineering, 2012
The Fermi Gamma-ray Space Telescope, launched in June 2008, is an observatory designed to survey the high-energy gamma-ray sky. The primary instrument, the Large Area Telescope (LAT), provides observations from 20 MeV to greater than 300 GeV. A second instrument, the Gamma-ray Burst Monitor (GBM), provides observations of transients from less than 10 ...
J. Mcenery   +3 more
semanticscholar   +3 more sources

Fermi Gamma-ray Space Telescope Observations of the Gamma-ray Outburst from 3C454.3 in November 2010

open access: yesJournal of Physics: Conference Series, 2012
The flat-spectrum radio quasar 3C454.3 underwent an extraordinary 5-day γ-ray outburst in November 2010 when the daily flux measured with the Fermi Large Area Telescope (LAT) at photon energies E > 100MeV reached (66±2) × 10−6ph cm−2s−1. This is a factor
B. Lott, C. Dermer, L. Escande
semanticscholar   +3 more sources

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