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Open AccessJournal ArticleDOI

A new population of very high energy gamma-ray sources in the Milky Way.

Felix Aharonian, +99 more
- 25 Mar 2005 - 
- Vol. 307, Iss: 5717, pp 1938-1942
TLDR
A first sensitive survey of the inner part of the Milky Way with the High Energy Stereoscopic System (HESS) reveals a population of eight previously unknown firmly detected sources of very high energy γ-rays.
Abstract
Very high energy gamma-rays probe the long-standing mystery of the origin of cosmic rays. Produced in the interactions of accelerated particles in astrophysical objects, they can be used to image cosmic particle accelerators. A first sensitive survey of the inner part of the Milky Way with the High Energy Stereoscopic System (HESS) reveals a population of eight previously unknown firmly detected sources of very high energy gamma-rays. At least two have no known radio or x-ray counterpart and may be representative of a new class of "dark" nucleonic cosmic ray sources.

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Fermi large area telescope first source catalog

A. A. Abdo, +288 more
TL;DR: The first Fermi-LAT catalog (1FGL) as mentioned in this paper contains 1451 sources detected and characterized in the 100 MeV to 100 GeV range, and the threshold likelihood Test Statistic is 25, corresponding to a significance of just over 4 sigma.
Journal ArticleDOI

The H.E.S.S. Survey of the Inner Galaxy in Very High Energy Gamma Rays

Felix Aharonian, +103 more
TL;DR: The distribution in Galactic latitude of the detected sources appears to be consistent with a scale height in the Galactic disk for the parent population smaller than 100 pc, consistent with expectations for supernova remnants and/or pulsar wind nebulae.
Journal ArticleDOI

Discovery of very-high-energy |[gamma]|-rays from the Galactic Centre ridge

Felix Aharonian, +102 more
- 09 Feb 2006 - 
TL;DR: In this paper, a very high-energy γ-ray emission from the Galactic Centre region has been measured using HESS, the High Energy Stereoscopic System recently constructed in Namibia, South West Africa.
Journal ArticleDOI

Background model systematics for the Fermi GeV excess

TL;DR: In this paper, a comprehensive study of model systematics coming from the Galactic diuse emission in the inner part of our Galaxy and their impact on the inferred properties of the excess emission at Galactic latitudes 2 < jbj < 20 and 300 MeV to 500 GeV were presented.
Journal ArticleDOI

Fermi/Large Area Telescope bright gamma-ray source list

A. A. Abdo, +257 more
TL;DR: In this article, the authors presented the initial results for energies above 100 MeV for the 205 most significant (statistical significance greater than 10-sigma) gamma-ray sources in early-mission data.
References
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Journal ArticleDOI

Analysis methods for results in gamma-ray astronomy

Ti-Pei Li, +1 more
TL;DR: In this paper, two formulas for estimating the significance of positive observations in searching gamma-ray sources or lines were proposed for analyzing the results of Gamma-ray astronomy experiments, which were tested with the aid of Monte Carlo simulations.
Journal ArticleDOI

High-energy particle acceleration in the shell of a supernova remnant.

Felix Aharonian, +114 more
- 04 Nov 2004 - 
TL;DR: A TeV γ-ray image of the SNR shows the spatially resolved remnant has a shell morphology similar to that seen in X-rays, which demonstrates that very-high-energy particles are accelerated there, consistent with current ideas of particle acceleration in young SNR shocks.
Journal ArticleDOI

Very high-energy gamma rays from the direction of Sagittarius A*

TL;DR: In this paper, the authors reported the detection of a point-like source of very high energy (VHE) gamma-rays coincident within 1' of Sgr A*, obtained with the H.E.S. array of Cherenkov telescopes.
Journal ArticleDOI

Catalog of CO radial velocities toward galactic H II regions

TL;DR: In this paper, a catalog of molecular cloud complexes associated with optical H II regions is presented, and the CO antenna temperature and line width are given for the most intense CO line seen toward each source.
Journal ArticleDOI

Calibration of cameras of the H.E.S.S. detector

TL;DR: In this article, the authors describe the methods used to convert the photomultiplier signals into the quantities needed for Cherenkov image analysis, and the long-term stability of the H.E.S. cameras are also presented.
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The H.E.S.S. Survey of the Inner Galaxy in Very High Energy Gamma Rays

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