The spectrum of the crab nebula and highest energy photons measured by HAWC

HAWC Collaboration, J. T. Linnemann*, J. P. Harding, J. Lundeen, S. Marinelli, H. Martínez-Huerta

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review


HAWC has developed new energy algorithms using an artificial neural network for event-by-event reconstruction of Very High Energy (VHE) primary gamma ray energies. Unlike previous estimation methods for HAWC photons, these estimate photon energies with good energy precision and accuracy in a range from 1 TeV to greater than 100 TeV. Photon emission at the highest energies is of interest in understanding acceleration mechanisms of astrophysical sources and where the acceleration might cut off. We apply the new HAWC reconstruction to present the preliminary measurement of the highest energies at which photons are emitted by the Crab Nebula and by six additional sources in the galactic plane which emit above 50 TeV. We have observed photons above 200 TeV at 95% confidence. We also compare fits to the HAWC Crab spectrum with other measurements and theoretical models of the Crab spectrum.

Original languageEnglish
Publication statusPublished - 2019
Externally publishedYes
Event36th International Cosmic Ray Conference, ICRC 2019 - Madison, United States
Duration: 24 Jul 20191 Aug 2019


Conference36th International Cosmic Ray Conference, ICRC 2019
Country/TerritoryUnited States

Bibliographical note

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All Science Journal Classification (ASJC) codes

  • General


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