14.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Goddard Space Flight CenterUS361 papers
- Marshall Space Flight CenterUS357 papers
- Centre National de la Recherche ScientifiqueFR280 papers
- Max Planck Institute for Extraterrestrial PhysicsDE240 papers
- University of Maryland, College ParkUS239 papers
- Universities Space Research AssociationUS214 papers
- Stanford UniversityUS212 papers
- National Institute for AstrophysicsIT196 papers
- University of Rome Tor VergataIT184 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR179 papers
- University of PaduaIT178 papers
- Istituto Nazionale di Fisica Nucleare, Roma Tor VergataIT175 papers
31 papers · 2 filters
Constraints on supermassive black hole spins from observations of active galaxy jets
E. Kun, P. J. Wiita, L. Á. Gergely +3
We discuss the origin of the low-energy cutoff, or LEC, seen in the radio spectra of many extragalactic jets and relate this to the spin of the supermassive black holes that presum…
Fermi-LAT Observations of the Gamma-ray Burst GRB 130427A
LAT collaboration, GBM collaboration
The observations of the exceptionally bright gamma-ray burst (GRB) 130427A by the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope provide constraints on the nature…
The BATSE 5B Gamma-Ray Burst Spectral Catalog
A. Goldstein, R. D. Preece, R. S. Mallozzi +5
We present systematic spectral analyses of GRBs detected with the Burst and Transient Source Experiment (BATSE) onboard the Compton Gamma-Ray Observatory (CGRO) during its entire n…
The First Pulse of the Extremely Bright GRB 130427A: A Test Lab for Synchrotron Shocks
R. Preece, J. Michael Burgess, A. von Kienlin +156
Gamma-ray burst (GRB) 130427A is one of the most energetic GRBs ever observed. The initial pulse up to 2.5 s is possibly the brightest well-isolated pulse observed to date. A fine…
The Bright Optical flash and Afterglow from the Gamma-Ray Burst GRB 130427A
W. T. Vestrand, J. Wren, A. Panaitescu +9
The optical light that is generated simultaneously with the x-rays and gamma-rays during a gamma-ray burst (GRB) provides clues about the nature of the explosions that occur as mas…
Super-Eddington Accretion in the Ultraluminous X-ray Source NGC1313 X-2: An Ephemeral Feast
Shan-Shan Weng, Shuang-Nan Zhang, Hai-Hui Zhao
We investigate the X-ray spectrum, variability and the surrounding ionized bubble of NGC1313 X-2 to explore the physics of super-Eddington accretion. Beyond the Eddington luminosit…
Gamma-Ray Burst Spectrum with Decaying Magnetic Field
X. H. Zhao, Z. Li, X. W. Liu +3
In the internal shock model for gamma-ray bursts (GRBs), the synchrotron spectrum from the fast cooling electrons in a homogeneous downstream magnetic field (MF) is too soft to pro…
How Long does a Burst Burst?
Bin-Bin Zhang, Bing Zhang, Kohta Murase +2
Several gamma-ray bursts (GRBs) last much longer (~hours) in gamma-rays than typical long GRBs (~ minutes), and recently it was proposed that these "ultra-long GRBs" may form a dis…
Pitch-angle scattering in magnetostatic turbulence. I. Test-particle simulations and the validity of analytical results
R. C. Tautz, A. Dosch, F. Effenberger +2
Context. Spacecraft observations have motivated the need for a refined description of the phase-space distribution function. Of particular importance is the pitch-angle diffusion c…
Determination of the Point-Spread Function for the Fermi Large Area Telescope from On-orbit Data and Limits on Pair Halos of Active Galactic Nuclei
LAT Collaboration
The Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope is a pair-conversion telescope designed to detect photons with energies from 20 MeV to > 300 GeV. The pre-laun…
Supermassive black hole mergers as dual sources for electromagnetic flares in the jet emission and gravitational waves
M. Tápai, L. Á. Gergely, Z. Keresztes +3
We present a new type of observation relating the gravitational wave emission of supermassive black hole mergers to their electromagnetic counterparts. This dual emission involves…
Magnetic field generation in a jet-sheath plasma via the kinetic Kelvin-Helmholtz instability
K. -I. Nishikawa, P. Hardee, B. Zhang +11
We have investigated generation of magnetic fields associated with velocity shear between an unmagnetized relativistic jet and an unmagnetized sheath plasma. We have examined the s…
Relativistic Jet Properties of GeV-TeV Blazars and Possible Implications for the Jet Formation, Composition, and Cavity Kinematics
Jin Zhang, Xiao-Na Sun, En-Wei Liang +3
We fit the spectral energy distributions (SEDs) of a GeV-TeV FSRQ sample with the leptonic model. Their gamma_min of the relativistic electron distributions, which significantly af…
Particle energization through time-periodic helical magnetic fields
Dhrubaditya Mitra, Axel Brandenburg, Brahmananda Dasgupta +2
We solve for the motion of charged particles in a helical time-periodic ABC (Arnold-Beltrami-Childress) magnetic field. The magnetic field lines of a stationary ABC field with coef…
Variable jet properties in GRB110721A: Time resolved observations of the jet photosphere
Shabnam Iyyani, Felix Ryde, Magnus Axelsson +8
{\it Fermi Gamma-ray Space Telescope} observations of GRB110721A have revealed two emission components from the relativistic jet: emission from the photosphere, peaking at $\sim 10…
An evaluation of the exposure in nadir observation of the JEM-EUSO mission
J. H. Adams, S. Ahmad, J. -N. Albert +258
We evaluate the exposure during nadir observations with JEM-EUSO, the Extreme Universe Space Observatory, on-board the Japanese Experiment Module of the International Space Station…
Evidence for New Relations between Gamma Ray Burst Prompt and X-ray Afterglow Emission from 9 Years of Swift
Dirk Grupe, John A. Nousek, Peter Veres +2
When a massive star explodes as a Gamma Ray Burst information about this explosion is retained in the properties of the prompt and afterglow emission. We report on new relationship…
Mass entrainment and turbulence-driven acceleration of ultra-high energy cosmic rays in Centaurus A
Sarka Wykes, Judith H. Croston, Martin J. Hardcastle +8
Observations of the FR I radio galaxy Centaurus A in radio, X-ray and gamma-ray bands provide evidence for lepton acceleration up to several TeV and clues about hadron acceleration…
Time-resolved Analysis of Fermi GRBs with Fast and Slow-Cooled Synchrotron Photon Models
J. M. Burgess, R. D. Preece, V. Connaughton +20
Time-resolved spectroscopy is performed on eight bright, long gamma-ray bursts (GRBs) dominated by single emission pulses that were observed with the {\it Fermi Gamma-ray Space Tel…
Probing Curvature Effects in the Fermi GRB 110920
A. Shenoy, E. Sonbas, C. Dermer +7
Curvature effects in Gamma-ray bursts (GRBs) have long been a source of considerable interest. In a collimated relativistic GRB jet, photons that are off-axis relative to the obser…
Earth Occultation Imaging of the Low Energy Gamma-Ray Sky with GBM
J. Rodi, M. L. Cherry, G. L. Case +5
The Earth Occultation Technique (EOT) has been applied to Fermi's Gamma-ray Burst Monitor (GBM) to perform all-sky monitoring for a predetermined catalog of hard X-ray/soft gamma-r…
The First Fermi LAT Gamma-Ray Burst Catalog
LAT Collaboration
In three years of observations since the beginning of nominal science operations in August 2008, the Large Area Telescope (LAT) on board the Fermi Gamma Ray Space Telescope has obs…
Radiation from accelerated particles in relativistic jets with shocks, shear-flow, and reconnection
K. -I. Nishikawa, P. Hardee, B. Zhang +11
We have investigated particle acceleration and shock structure associated with an unmagnetized relativistic jet propagating into an unmagnetized plasma. Strong magnetic fields gene…
Techniques for targeted Fermi-GBM follow-up of gravitational-wave events
Lindy Blackburn, Michael S. Briggs, Jordan Camp +4
The Advanced LIGO and Advanced Virgo ground-based gravitational-wave detectors are projected to come online 2015-2016, reaching a final sensitivity sufficient to observe dozens of…