Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/50807
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Type: Journal article
Title: HESS very-high-energy gamma-ray sources without identified counterparts
Author: Aharonian, F.
Akhperjanian, A.
Barres de Almaida, U.
Bazer-Bachi, A.
Behera, B.
Beilicke, M.
Benbow, W.
Bernlohr, K.
Boisson, C.
Bolz, O.
Borrel, V.
Braun, I.
Brion, E.
Brown, A.
Buhler, R.
Bulik, T.
Busching, I.
Boutelier, T.
Carrigan, S.
Chadwick, P.
et al.
Citation: Astronomy and Astrophysics: a European journal, 2008; 477(1):353-363
Publisher: E D P Sciences
Issue Date: 2008
ISSN: 0004-6361
1432-0746
Statement of
Responsibility: 
F. Aharonian ... G. Rowell ... et al.
Abstract: Context. The detection of gamma rays in the very-high-energy (VHE) energy range (100 GeV-100 TeV) provides a direct view of the parent population of ultra-relativistic particles found in astrophysical sources. For this reason, VHE gamma rays are useful for understanding the underlying astrophysical processes in non-thermal sources. Aims. We investigate unidentified VHE gamma-ray sources that have been discovered with HESS in the most sensitive blind survey of the Galactic plane at VHE energies conducted so far. Methods. The HESS array of imaging atmospheric Cherenkov telescopes (IACTs) has a high sensitivity compared with previous instruments (∼0.01 Crab in 25 h observation time for a 5σ point-source detection), and with its large field of view, is well suited for scan-based observations. The on-going HESS survey of the inner Galaxy has revealed a large number of new VHE sources, and for each we attempt to associate the VHE emission with multi-wavelength data in the radio through X-ray wavebands. Results. For each of the eight unidentified VHE sources considered here, we present the energy spectra and. sky maps of the sources and their environment. The VHE morphology is compared with available multi-wavelength data (mainly radio and X-rays). No plausible counterparts are found. © ESO 2007.
Keywords: gamma rays: observations
Galaxy: general
cosmic rays
surveys
Rights: Copyright © ESO 2007
DOI: 10.1051/0004-6361:20078516
Appears in Collections:Aurora harvest
Chemistry and Physics publications

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