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  4. Teraelectronvolt pulsed emission from the Crab Pulsar detected by MAGIC
 
research article

Teraelectronvolt pulsed emission from the Crab Pulsar detected by MAGIC

Ansoldi, S.
•
Antonelli, L. A.
•
Antoranz, P.
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2016
Astronomy & Astrophysics

Aims. We investigate the extension of the very high-energy spectral tail of the Crab Pulsar at energies above 400 GeV. Methods. We analyzed similar to 320 h of good-quality Crab data obtained with the MAGIC telescope from February 2007 to April 2014. Results. We report the most energetic pulsed emission ever detected from the Crab Pulsar reaching up to 1.5 TeV. The pulse profile shows two narrow peaks synchronized with those measured in the GeV energy range. The spectra of the two peaks follow two different power-law functions from 70GeV up to 1.5 TeV and connect smoothly with the spectra measured above 10GeV by the Large Area Telescope (LAT) on board the Fermi satellite. When making a joint fit of the LAT and MAGIC data above 10 GeV the photon indices of the spectra differ by 0.5 +/- 0.1. Conclusions. Using data from the MAGIC telescopes we measured the most energetic pulsed photons from a pulsar to date. Such TeV pulsed photons require a parent population of electrons with a Lorentz factor of at least 5x10(6). These results strongly suggest IC scattering off low-energy photons as the emission mechanism and a gamma-ray production region in the vicinity of the light cylinder.

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Type
research article
DOI
10.1051/0004-6361/201526853
Web of Science ID

WOS:000369710300140

Author(s)
Ansoldi, S.
Antonelli, L. A.
Antoranz, P.
Babic, A.
Bangale, P.
Barres De Almeida, U.
Barrio, J. A.
Becerra Gonzalez, J.
Bednarek, W.
Bernardini, E.
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Date Issued

2016

Publisher

Edp Sciences S A

Published in
Astronomy & Astrophysics
Volume

585

Article Number

A133

Subjects

gamma rays: stars

•

pulsars: individual: Crab pulsar

•

stars: neutron

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
IPHYS  
Available on Infoscience
April 1, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/125460
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