output
19912026
Showing 2010 · astro-ph.HEShow all

70 papers · 2 filters

astro-ph.HE2010★ 102 cited

H.E.S.S. constraints on Dark Matter annihilations towards the Sculptor and Carina Dwarf Galaxies

HESS Collaboration, A. Abramowski, F. Acero +192

The Sculptor and Carina Dwarf spheroidal galaxies were observed with the H.E.S.S. Cherenkov telescope array between January 2008 and December 2009. The data sets consist of a total…

astro-ph.HE2010★ 11 cited

Confirmation of IGR J01363+6610 as a Be X-ray binary with very low quiescent X-ray luminosity

John A. Tomsick, Craig Heinke, Jules Halpern +4

The field containing the candidate High Mass X-ray Binary IGR J01363+6610 was observed by XMM-Newton on 2009 July 31 for 28 ks. A Be star was previously suggested as the possible c…

astro-ph.HE2010★ 120 cited

Fermi Large Area Telescope observations of Local Group galaxies: Detection of M31 and search for M33

LAT collaboration

Cosmic rays (CRs) can be studied through the galaxy-wide gamma-ray emission that they generate when propagating in the interstellar medium. The comparison of the diffuse signals fr…

astro-ph.HE2010★ 47 cited

Spectral and timing properties of the accreting X-ray millisecond pulsar IGR J17511-3057

M. Falanga, L. Kuiper, J. Poutanen +6

IGR J17511-3057 is the second X-ray transient accreting millisecond pulsar discovered by INTEGRAL. It was in outburst for about a month from September 13, 2009. The broad-band aver…

astro-ph.HE2010★ 35 cited

Radio and X-ray variability in the Seyfert galaxy NGC 4051

Sadie Jones, Ian McHardy, Derek Moss +5

We present intensive quasi-simultaneous X-ray and radio monitoring of the narrow line Seyfert 1 galaxy NGC 4051, over a 16 month period in 2000-2001. Observations were made with th…

astro-ph.HE2010★ 239 cited

Insights Into the High-Energy Gamma-ray Emission of Markarian 501 from Extensive Multifrequency Observations in the Fermi Era

LAT collaboration, A. A. Abdo et al., the MAGIC collaboration +6

We report on the gamma-ray activity of the blazar Mrk 501 during the first 480 days of Fermi operation. We find that the average LAT gamma-ray spectrum of Mrk 501 can be well descr…

astro-ph.HE2010★ 46 cited

First evidence for a gravitational lensing-induced echo in gamma rays with Fermi LAT

A. Barnacka, J-F. Glicenstein, Y. Moudden

Aims. This article shows the first evidence for gravitational lensing phenomena in high energy gamma-rays. This evidence comes from the observation of a gravitational lens induced…

astro-ph.HE2010★ 65 cited

Search for a diffuse flux of high-energy with the ANTARES neutrino telescope

ANTARES Collaboration, J. A. Aguilar, I. Al Samarai +141

A search for a diffuse flux of astrophysical muon neutrinos, using data collected by the ANTARES neutrino telescope is presented. A sr sky was monitored for a tot…

astro-ph.HE2010★ 87 cited

Fermi-LAT Search for Pulsar Wind Nebulae around gamma-ray Pulsars

The Fermi LAT Collaboration, Pulsar Timing Consortium

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…

astro-ph.HE2010★ 111 cited

Constraints on the Cosmic-Ray Density Gradient beyond the Solar Circle from Fermi gamma-ray Observations of the Third Galactic Quadrant

Fermi LAT Collaboration

We report an analysis of the interstellar -ray emission in the third Galactic quadrant measured by the {Fermi} Large Area Telescope. The window encompassing the Galactic plane f…

astro-ph.HE2010★ 364 cited

Gamma-ray flares from the Crab Nebula

LAT Collaboration

A young and energetic pulsar powers the well-known Crab Nebula. Here we describe two separate gamma-ray (photon energy >100 MeV) flares from this source detected by the Large Area…

astro-ph.HE2010★ 3 cited

Investigating accretion disk - radio jet coupling across the stellar mass scale

James C. A. Miller-Jones, Gregory R. Sivakoff, Diego Altamirano +13

Relationships between the X-ray and radio behavior of black hole X-ray binaries during outbursts have established a fundamental coupling between the accretion disks and radio jets…

astro-ph.HE2010★ 61 cited

A Global Study of the Behaviour of Black Hole X-ray Binary Discs

Robert Dunn, Rob Fender, Elmar Koerding +2

We investigate the behaviour of the accretion discs in the outbursts of the low-mass black-hole X-ray binaries (BHXRB), an overview of which we have presented previously. Almost al…

astro-ph.HE2010★ 42 cited

A decelerating jet observed by the EVN and VLBA in the X-ray transient XTE J1752-223

J. Yang, C. Brocksopp, S. Corbel +3

The recently discovered Galactic X-ray transient XTE J1752-223 entered its first known outburst in 2010, emitting from the X-ray to the radio regimes. Its general X-ray properties…

astro-ph.HE2010★ 17 cited

A multi-wavelength study of the unidentified TeV gamma-ray source HESS J1626-490

P. Eger, G. Rowell, A. Kawamura +3

HESS J1626-490, so far only detected with the H.E.S.S. array of imaging atmospheric Cherenkov telescopes, could not be unambiguously identified with any source seen at lower energi…

astro-ph.HE2010★ 92 cited

Fermi Large Area Telescope Observation of a Gamma-ray Source at the Position of Eta Carinae

The Fermi LAT collaboration

The Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope detected a gamma-ray source that is spatially consistent with the location of Eta Carinae. This source ha…

astro-ph.HE2010★ 106 cited

Fermi-LAT Study of Gamma-ray Emission in the Direction of Supernova Remnant W49B

LAT Collaboration

We present an analysis of the gamma-ray data obtained with the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope in the direction of SNR W49B (G43.3-0.2). A br…

astro-ph.HE2010★ 1 cited

Multi-wavelength study of High Mass X-ray Binaries

Sylvain Chaty

The INTEGRAL satellite has revealed a major population of supergiant High Mass X-ray Binaries in our Galaxy, revolutionizing our understanding of binary systems and their evolution…

astro-ph.HE2010★ 87 cited

Detection of the Small Magellanic Cloud in gamma-rays with Fermi/LAT

LAT collaboration

The flux of gamma rays with energies >100MeV is dominated by diffuse emission from CRs illuminating the ISM of our Galaxy through the processes of Bremsstrahlung, pion production a…

astro-ph.HE2010★ 75 cited

Radio lobes and X-ray hot spots in the microquasar S26

Roberto Soria, Manfred W. Pakull, Jess W. Broderick +2

We have studied the structure and energetics of the powerful microquasar/shock-ionized nebula S26 in NGC 7793, with particular focus on its radio and X-ray properties. Using the Au…

astro-ph.HE2010★ 88 cited

Searches for Cosmic-Ray Electron Anisotropies with the Fermi Large Area Telescope

The Fermi LAT Collaboration

The Large Area Telescope on board the \textit{Fermi} satellite (\textit{Fermi}-LAT) detected more than 1.6 million cosmic-ray electrons/positrons with energies above 60 GeV during…

astro-ph.HE2010★ 346 cited

Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV

Fermi LAT collaboration

We present the results of our analysis of cosmic-ray electrons using about 8 million electron candidates detected in the first 12 months on-orbit by the Fermi Large Area Telescope.…

astro-ph.HE2010★ 51 cited

VLT/X-shooter spectroscopy of the GRB 090926A afterglow

V. D'Elia, J. P. U. Fynbo, S. Covino +21

The aim of this paper is to study the environment and intervening absorbers of the gamma-ray burst GRB 090926A through analysis of optical spectra of its afterglow. We analyze medi…

astro-ph.HE2010★ 28 cited

Challenging GRB models through the broadband dataset of GRB060908

S. Covino, S. Campana, M. L. Conciatore +37

Context: Multiwavelength observations of gamma-ray burst prompt and afterglow emission are a key tool to disentangle the various possible emission processes and scenarios proposed…