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Do Fermi-LAT observations really imply very large Lorentz factors in GRB outflows ?
gamma-ray burst: general gamma-ray burst: individual: GRB 080916C radiative transfer radiation mechanisms: non-thermal
2011/10/20
Recent detections of GeV photons in a few GRBs by Fermi-LAT imply huge bulk Lorentz factors to avoid a large gamma gamma optical depth at high energy. Estimates can be as high as Gamma ~ 1000 in the m...
Constraints on the Synchrotron Shock Model for the Fermi GBM Gamma-Ray Burst 090820A
Constraints Synchrotron Shock Model Fermi GBM Gamma-Ray Burst 090820A
2011/10/18
Discerning the radiative dissipation mechanism for prompt emission in Gamma-Ray Bursts (GRBs) requires detailed spectroscopic modeling that straddles the $\nu F_{\nu}$ peak in the 100 keV - 1 MeV rang...
Peculiarly Narrow SED of GRB 090926B with MAXI and Fermi/GBM
gamma rays: bursts — methods: data analysis
2011/10/19
The monitor of all-sky X-ray image (MAXI) Gas Slit Camera (GSC) on the International Space Station (ISS) detected a gamma-ray burst (GRB) on 2009, September 26, GRB\,090926B. This GRB had extremely ha...
Fermi-LAT Search for Pulsar Wind Nebulae around gamma-ray Pulsars
catalogs – gamma rays observations – pulsars general
2010/11/12
The high sensitivity of the Fermi-LAT (Large Area Telescope) offers the first opportunity to study faint and extended GeV sources such as pulsar wind nebulae (PWNe). After one year of observation the ...
Blazar jet physics in the age of Fermi
galaxies: jets gamma rays observations gamma rays theory
2010/11/9
The impact of the Fermi Gamma-ray Space Telescope on blazar research is reviewed. This
includes a brief description of the Fermi Large Area Telescope, a summary of the various classes of extragalacti...
Precise Gamma-Ray Timing and Radio Observations of 17 Fermi Gamma-Ray Pulsars
Gamma rays stars pulsars general Radio continuum stars X-rays: stars
2010/11/15
We present precise phase-connected pulse timing solutions for 16 gamma-ray-selected pulsars
recently discovered using the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope plus one ve...
Neutrino emission of Fermi supernova remnants
High Energy Astrophysical Phenomena (astro-ph.HE) High Energy Physics - Phenomenology (hep-ph)
2010/12/28
The Fermi $\gamma$-ray space telescope reported the observation of several Galactic supernova remnants recently, with the $\gamma$-ray spectra well described by hadronic $pp$ collisions. The possible ...
Searching for Needles in Haystacks - Using the Fermi/GBM to find GRB gamma-rays with the Fermi/LAT Detector
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/27
From the launch of the Fermi Gamma-ray Space Telescope to July 9, 2010, the Gamma-ray Burst Monitor (GBM) has detected 497 probable GRB events. Twenty-two of these satisfy the simultaneous requirement...
Searching for Needles in Haystacks - Looking for GRB gamma-rays with the Fermi/LAT Detector
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/27
Since the launch of the Fermi Gamma-ray Space Telescope on June 11, 2008, 55 gamma-ray bursts (GRBs) have been observed at coordinates that fall within 66^\circ of the Fermi Large Area Telescope (LAT)...
Implications of the Cosmic Ray Electron Spectrum and Anisotropy measured with Fermi-LAT
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/23
The Fermi Large Area Telescope (LAT) collaboration recently released the updated results of the measurement of the cosmic ray electron (CRE) spectrum and published its first constraints on the CRE ani...
Can past gamma-ray bursts explain both INTEGRAL and PAMELA/Fermi anomalies simultaneously?
Gamma ray bursts gamma-ray bursts
2010/3/9
Gamma-ray bursts (GRB) have been invoked to explain both the 511 keV emission from the galactic bulge and the high-energy positron excess inferred from the PAMELA and Fermi data. While independent exp...