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|Title:||First limits on the very-high energy gamma-ray afterglow emission of a fast radio burst: H.E.S.S. Observations of FRB 150418|
Ait Benkhali, F.
Becker Tjus, J.
|Citation:||Astronomy and Astrophysics, 2017; 597:A115-1-A115-5|
|H. Abdalla, A. Abramowski, F. Aharonian, F. Ait Benkhali … Gavin P. Rowell … Fabien Voisin … et al. (H.E.S.S. Collaboration)|
|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 h of the radio burst. Results. The obtained 1.4 h 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 Φγ(E > 350 GeV) < 1.33 × 10-8 m-2 s-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 × 1047 erg/s at 99% C.L.|
|Keywords:||Gamma rays; astroparticle physics|
|Rights:||© ESO 2017|
|Appears in Collections:||Physics publications|
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