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Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

DOI: 10.22323/1.395.0779

arXiv, 2021

DOI: 10.48550/arxiv.2108.03401

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Revisiting the PeVatron candidate MGRO J1908+06 with an updated H.E.S.S. analysis

Journal article published in 2022 by Hess, E. O. Angüner, F. A. Benkhali, E. de Ona Wilhelmi, Isak Delberth Davids, Celine Armand, Catherine Boisson, Garret Cotter, Julien Bolmont, Malgorzata Curlo, James Davies, Olaf Reimer, Victor Barbosa Martins, Baiyang Bi, Hannah Dalgleish and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Data provided by SHERPA/RoMEO

Abstract

Detecting and studying galactic gamma-ray sources emitting very-high energy photons sheds light on the acceleration and propagation of cosmic rays presumably created in these sources. Currently, there are few sources emitting photons with energies exceeding 100 TeV. In this work we revisit the unidentified source MGRO J1908+06, initially detected by Milagro, using an updated H.E.S.S. dataset and analysis pipeline. The vicinity of the source contains a supernova remnant and pulsars as well as molecular clouds. This makes the identification of the primary source(s) of galactic cosmic rays as well as the nature of the gamma-ray emission challenging, especially in light of the recent HAWC and LHAASO detection of the high energy tail of its spectrum. Exploiting the better angular resolution as compared to particle detectors, we investigate the morphology of the source as well as its spectral properties.