First limits on the very-high energy gamma-ray afterglow emission of a fast radio burst: H.E.S.S. observations of FRB 150418

H. Abdalla P. Aubert 1 J. Chevalier 1 A. Fiasson 1 G. Lamanna 1 J.P. Lees 1 G. Maurin 1 Q. Piel 1 D.A. Sanchez 1 C. Trichard 1 T. Vuillaume 1
1 LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules - Laboratoire d'Annecy de Physique des Particules
Abstract : Aims: Following the detection of the fast radio burst FRB150418 by the SUPERB project at the Parkes radio telescope, we aim to search for very-high energy gamma-ray afterglow emission. Methods: Follow-up observations in the very-high energy gamma-ray domain were obtained with the H.E.S.S. imaging atmospheric Cherenkov telescope system within 14.5 hours of the radio burst. Results: The obtained 1.4 hours of gamma-ray observations are presented and discussed. At the 99 % C.L. we obtained an integral upper limit on the gamma-ray flux of (E>350 GeV) < 1.33 x 10^-8 m^-2s^-1. Differential flux upper limits as function of the photon energy were derived and used to constrain the intrinsic high-energy afterglow emission of FRB 150418. Conclusions: No hints for high-energy afterglow emission of FRB 150418 were found. Taking absorption on the extragalactic background light into account and assuming a distance of z = 0.492 based on radio and optical counterpart studies and consistent with the FRB dispersion, we constrain the gamma-ray luminosity at 1 TeV to L < 5.1 x 10^47 erg/s at 99% C.L.
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Astronomy and Astrophysics - A&A, EDP Sciences, 2017, 597, pp.A115. 〈10.1051/0004-6361/201629117〉
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Soumis le : vendredi 27 janvier 2017 - 10:50:57
Dernière modification le : jeudi 11 janvier 2018 - 06:13:33

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H. Abdalla, P. Aubert, J. Chevalier, A. Fiasson, G. Lamanna, et al.. First limits on the very-high energy gamma-ray afterglow emission of a fast radio burst: H.E.S.S. observations of FRB 150418. Astronomy and Astrophysics - A&A, EDP Sciences, 2017, 597, pp.A115. 〈10.1051/0004-6361/201629117〉. 〈in2p3-01447669〉

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