The Spectrum of the Crab Nebula and Highest Energy Photons Measured by HAWC

Linnemann, James T.; Harding, James Patrick; Lundeen, Joseph Andrew; Marinelli, Samuel; Martínez-Huerta, Humberto

doi:10.22323/1.358.0723

Title: The Spectrum of the Crab Nebula and Highest Energy Photons Measured by HAWC

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Abstract

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.

Authors:

Linnemann, James T. ^[1];

^[2];

^[3]; Marinelli, Samuel ^[1]; Martínez-Huerta, Humberto ^[4]

Michigan State Univ., East Lansing, MI (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Michigan State Univ., East Lansing, MI (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Universidade de São Paulo, São Carlos, SP (Brasil)

Publication Date:: Mon Jul 22 00:00:00 EDT 2019

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP); USDOE National Nuclear Security Administration (NNSA)

Contributing Org.:: HAWC Collaboration

OSTI Identifier:: 1804381

Report Number(s):: LA-UR-21-22666
Journal ID: ISSN 1824-8039; TRN: US2212282

Grant/Contract Number:: 89233218CNA000001

Resource Type:: Accepted Manuscript

Journal Name:: PoS - Proceedings of Science

Additional Journal Information:: Journal Volume: 358; Conference: 36.International Cosmic Ray Conference (ICRC2019) , Madison, WI (United States), 24 Jul - 1 Aug 2019; Journal ID: ISSN 1824-8039

Publisher:: SISSA

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS

Citation Formats


                    Linnemann, James T., Harding, James Patrick, Lundeen, Joseph Andrew, Marinelli, Samuel, and Martínez-Huerta, Humberto. The Spectrum of the Crab Nebula and Highest Energy Photons Measured by HAWC.  United States: N. p., 2019. 
Web.  doi:10.22323/1.358.0723.

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                    Linnemann, James T., Harding, James Patrick, Lundeen, Joseph Andrew, Marinelli, Samuel, & Martínez-Huerta, Humberto. The Spectrum of the Crab Nebula and Highest Energy Photons Measured by HAWC.  United States.  https://doi.org/10.22323/1.358.0723

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                    Linnemann, James T., Harding, James Patrick, Lundeen, Joseph Andrew, Marinelli, Samuel, and Martínez-Huerta, Humberto. Mon .  
"The Spectrum of the Crab Nebula and Highest Energy Photons Measured by HAWC".  United States.  https://doi.org/10.22323/1.358.0723.  https://www.osti.gov/servlets/purl/1804381.

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@article{osti_1804381,

  title        = {The Spectrum of the Crab Nebula and Highest Energy Photons Measured by HAWC},

  author       = {Linnemann, James T. and Harding, James Patrick and Lundeen, Joseph Andrew and Marinelli, Samuel and Martínez-Huerta, Humberto},

  abstractNote = {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.},

  doi          = {10.22323/1.358.0723},

  journal      = {PoS - Proceedings of Science},

  number       = ,

  volume       = 358,

  place        = {United States},

  year         = {Mon Jul 22 00:00:00 EDT 2019},

  month        = {Mon Jul 22 00:00:00 EDT 2019}

}

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