output
19922026
Showing 2009 · astro-ph.HEShow all

17 papers · 2 filters

astro-ph.HE2009★ 30 cited

Electron heating and acceleration by magnetic reconnection in hot accretion flows

Jian Ding, Feng Yuan, Edison Liang

Both analytical and numerical works show that magnetic reconnection must occur in hot accretion flows. This process will effectively heat and accelerate electrons. In this paper we…

astro-ph.HE2009★ 279 cited

Fermi Large Area Telescope Observations of the Crab Pulsar and Nebula

The Fermi LAT collaboration, the Fermi Pulsar Timing Consortium, : +1

We report on gamma-ray observations of the Crab Pulsar and Nebula using 8 months of survey data with the Fermi Large Area Telescope (LAT). The high quality light curve obtained usi…

astro-ph.HE2009★ 147 cited

Fermi observations of TeV-selected AGN

S. J. Fegan, D. Sanchez, Fermi LAT Collaboration +2

We report on observations of TeV-selected AGN made during the first 5.5 months of observations with the Large Area Telescope (LAT) on-board the Fermi Gamma-ray Space Telescope (Fer…

astro-ph.HE2009★ 448 cited

Fermi Observations of GRB 090902B: A Distinct Spectral Component in the Prompt and Delayed Emission

GBM collaboration, LAT Collaboration, The Swift Team

We report on the observation of the bright, long gamma-ray burst, GRB 090902B, by the Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) instruments on-board the Fermi ob…

astro-ph.HE2009★ 52 cited

Fermi LAT detection of pulsed gamma-rays from the Vela-like pulsars PSR J1048-5832 and PSR J2229+6114

Fermi LAT collaboration, Fermi Pulsar Timing Consortium

We report the detection of gamma-ray pulsations (> 0.1 GeV) from PSR J2229+6114 and PSR J1048-5832, the latter having been detected as a low-significance pulsar by EGRET. Data in t…

astro-ph.HE2009★ 163 cited

Swift and Fermi observations of the early afterglow of the short Gamma-Ray Burst 090510

M. De Pasquale, P. Schady, N. P. M. Kuin +11

We present the observations of GRB090510 performed by the Fermi Gamma-Ray Space Telescope and the Swift observatory. This is a bright, short burst that shows an extended emission d…

astro-ph.HE2009★ 6 cited

Particle Acceleration at Relativistic Shocks in Extragalactic Systems

Matthew G. Baring, Errol J. Summerlin

Diffusive shock acceleration (DSA) at relativistic shocks is expected to be an important acceleration mechanism in a variety of astrophysical objects including extragalactic jets i…

astro-ph.HE2009★ 260 cited

Fermi-LAT Discovery of Extended Gamma-ray Emission in the Direction of Supernova Remnant W51C

Fermi LAT collaboration

The discovery of bright gamma-ray emission coincident with supernova remnant (SNR) W51C is reported using the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescop…

astro-ph.HE2009★ 463 cited

The First Fermi Large Area Telescope Catalog of Gamma-ray Pulsars

A. A. Abdo

The dramatic increase in the number of known gamma-ray pulsars since the launch of the Fermi Gamma-ray Space Telescope (formerly GLAST) offers the first opportunity to study a popu…

astro-ph.HE2009★ 16 cited

MC Simulations of the Broadband Spectra of Sagittarius A* through the use of GRMHD

Guy Hilburn, Edison Liang, Siming Liu +1

We present results of simulations of the spectrum of the accretion flow onto the supermassive black hole in our Galactic Centre, Sagittarius A*, generated with a coupling of Monte-…

astro-ph.HE2009★ 601 cited

Testing Einstein's special relativity with Fermi's short hard gamma-ray burst GRB090510

LAT Collaboration

Gamma-ray bursts (GRBs) are the most powerful explosions in the universe and probe physics under extreme conditions. GRBs divide into two classes, of short and long duration, thoug…

astro-ph.HE2009★ 61 cited

Prospects for GRB Science with the Fermi Large Area Telescope

D. L. Band, M. Axelsson, L. Baldini +54

The LAT instrument on the Fermi mission will reveal the rich spectral and temporal gamma-ray burst phenomena in the > 100 MeV band. The synergy with Fermi's GBM detectors will link…

astro-ph.HE2009★ 6 cited

Radiation from Comoving Poynting Flux Acceleration

Edison Liang, Koichi Noguchi

We derive analytic formulas for the radiation power output when electrons are accelerated by a relativistic comoving kinetic Poynting flux, and validate these analytic results with…

astro-ph.HE2009★ 5 cited

The Behavior of Matter under Extreme Conditions

F. Paerels, M. Mendez, M. Agueros +29

The cores of neutron stars harbor the highest matter densities known to occur in nature, up to several times the densities in atomic nuclei. Similarly, magnetic field strengths can…

astro-ph.HE2009★ 173 cited

Simultaneous observations of PKS 2155-304 with H.E.S.S., Fermi, RXTE and ATOM: spectral energy distributions and variability in a low state

H. E. S. S., Fermi-LAT collaborations

We report on the first simultaneous observations that cover the optical, X-ray, and high energy gamma-ray bands of the BL Lac object PKS 2155-304. The gamma-ray bands were observed…

astro-ph.HE2009★ 36 cited

Discovery of Pulsed Gamma Rays from the Young Radio Pulsar PSR J1028-5819 with the Fermi Large Area Telescope

LAT Collaboration

Radio pulsar PSR J1028-5819 was recently discovered in a high-frequency search (at 3.1 GHz)in the error circle of the EGRET source 3EG J1027-5817. The spin-down power of this young…

astro-ph.HE2009★ 7 cited

Probes of Diffusive Shock Acceleration using Gamma-Ray Burst Prompt Emission

Matthew G. Baring

The principal paradigm for gamma-ray bursts (GRBs) suggests that the prompt transient gamma-ray signal arises from multiple shocks internal to the relativistic expansion. This pape…