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Energy spectrum of cosmic-ray electrons at TeV energies
(APS, 2008)
The very large collection area of ground-based γ-ray telescopes gives them a substantial advantage over balloon or satellite based instruments in the detection of very-high-energy (>600 GeV) cosmic-ray electrons. Here we ...
Very high energy γ-ray observations of the binary PSR B1259-63/SS2883 around the 2007 Periastron
(EDP Sciences, 2009)
Aims. This article presents very-high-energy (VHE; E > 100 GeV) data from the γ-ray binary PSR B1259-63 as taken during the years 2005, 2006 and before as well as shortly after the 2007 periastron passage. These data extend ...
Modeling high-energy and very-high-energy γ-rays from the Terzan 5 cluster
(Fermi, 2011)
The Fermi Large Area Telescope (LAT) has recently detected a population of globular clusters (GCs) in highenergy (HE) γ-rays. Their spectral properties and energetics are consistent with cumulative emission from a
population ...
Multiwavelength modeling of the globular cluster Terzan 5
(ICRC, 2011)
Diffuse X-ray emission has recently been detected from the globular cluster (GC) Terzan 5, extending out to ~2.5' from the cluster centre. This emission may arise from synchrotron radiation (SR) by energetic leptons being ...
Geometric modelling of radio and γ-ray light curves of 6 Fermi LAT pulsars
(Sissa Medialab, 2010)
The Fermi Large Area Telescope (LAT) has recently reported the detection of pulsed γ-rays
from 6 young pulsars (J0631+1036, J0659+1414, J0742−2822, J1420−6048, J1509−5850, and
J1718−3825), all exhibiting single-peaked ...
Constraints on the lepton content of PWN from the local CR positron spectrum
(ICRC, 2008)
Geminga is a nearby pulsar with an age of 3.42×105
yr and a spindown power of 3.2×1034
erg/s at present. B0656+14 has comparable spindown power, with an age of 1.11×105
yr and a distance
of 290 pc. The winds of these ...
Spectrum and variability of the Galactic center VHE y-ray source HESS J1745-290
(EDP Sciences, 2009)
Aims. A detailed study of the spectrum and variability of the source HESS J1745-290 in the Galactic Center (GC) region using new data from the H.E.S.S. array of Cherenkov telescopes is presented. Flaring activity and quasi ...
Very-high-energy gamma-ray emission from the direction of the Galactic globular cluster Terzan 5
(EDP Sciences, 2011)
The HESS very-high-energy (VHE, E > 0.1 TeV) gamma-ray telescope system has discovered a new source, HESS J1747-248. The measured integral flux is (1.2 ± 0.3) × 10-12 cm-2 s-1 above 440 GeV for a power-law photon spectral ...
Limits on energy dependence of the speed of light from a flare of the active galaxy PKS 2155-304
(American Physical Society, 2008)
In the past few decades, several models have predicted an energy dependence of the speed of light in the context of quantum gravity. For cosmological sources such as active galaxies, this minuscule effect can add up to ...