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dc.contributor.authorAbdalla, H.-
dc.contributor.authorAbramowski, A.-
dc.contributor.authorAharonian, F.-
dc.contributor.authorBenkhali, F.-
dc.contributor.authorAngüner, E.-
dc.contributor.authorArakawa, M.-
dc.contributor.authorArmand, C.-
dc.contributor.authorArrieta, M.-
dc.contributor.authorBackes, M.-
dc.contributor.authorBalzer, A.-
dc.contributor.authorBarnard, M.-
dc.contributor.authorBecherini, Y.-
dc.contributor.authorTjus, J.-
dc.contributor.authorBerge, D.-
dc.contributor.authorBernhard, S.-
dc.contributor.authorBernlöhr, K.-
dc.contributor.authorBlackwell, R.-
dc.contributor.authorBöttcher, M.-
dc.contributor.authorBoisson, C.-
dc.contributor.authorBolmont, J.-
dc.contributor.authoret al.-
dc.identifier.citationAstronomy and Astrophysics: a European journal, 2018; 612:A13-1-A13-8-
dc.description.abstractThe H.E.S.S. Collaboration has discovered a new very high energy (VHE, E > 0.1 TeV) γ-ray source, HESS J1741−302, located in the Galactic plane. Despite several attempts to constrain its nature, no plausible counterpart has been found so far at X-ray and MeV/GeV γ-ray energies, and the source remains unidentified. An analysis of 145-h of observations of HESS J1741−302 at VHEs has revealed a steady and relatively weak TeV source (~1% of the Crab Nebula flux), with a spectral index of Γ = 2.3 ± 0.2stat ± 0.2sys, extending to energies up to 10 TeV without any clear signature of a cut-off. In a hadronic scenario, such a spectrum implies an object with particle acceleration up to energies of several hundred TeV. Contrary to most H.E.S.S. unidentified sources, the angular size of HESS J1741−302 is compatible with the H.E.S.S. point spread function at VHEs, with an extension constrained to be below 0.068° at a 99% confidence level. The γ-ray emission detected by H.E.S.S. can be explained both within a hadronic scenario, due to collisions of protons with energies of hundreds of TeV with dense molecular clouds, and in a leptonic scenario, as a relic pulsar wind nebula, possibly powered by the middle-aged (20 kyr) pulsar PSR B1737−30. A binary scenario, related to the compact radio source 1LC 358.266+0.038 found to be spatially coincident with the best fit position of HESS J1741−302, is also envisaged.-
dc.description.statementofresponsibilityH. Abdalla … R. Blackwell … P. de Wilt … J. Hawkes … J. Lau … N. Maxted … G. Rowell … F. Voisin … et al. [The H.E.S.S. Collaboration]-
dc.publisherEDP Sciences-
dc.rights© ESO 2018-
dc.subjectGamma rays: ISM; gamma rays: general; cosmic rays; ISM: clouds-
dc.titleHESS J1741-302: a hidden accelerator in the Galactic plane-
dc.typeJournal article-
Appears in Collections:Aurora harvest 8
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