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VHE gamma-ray observation of the Crab Nebula and its pulsar with the MAGIC telescope

Albert J
•
Aliu E
•
Anderhub H
altro
DE LOTTO, Barbara
2008
  • journal article

Periodico
THE ASTROPHYSICAL JOURNAL
Abstract
We report about very high energy (VHE) gamma-ray observations of the Crab Nebula with the MAGIC telescope. The gamma-ray flux from the nebula was measured between 60 GeV and 9 TeV. The energy spectrum can be described by a curved power law dF/dE = f(0)(E/300 GeV)([a+b log)((E/300 GeV)])(10) with a flux normalization f(0) of (6.0 +/- 0.2(stat)) x 10(-10) cm(-2) s(-1) TeV-1, a = 2.31 +/- 0.06(stat), and b = 0.26 +/- 0.07(stat). The peak in the spectral energy distribution is estimated at 77 +/- 35 GeV. Within the observation time and the experimental resolution of the telescope, the gamma-ray emission is steady and pointlike. The emission's center of gravity coincides with the position of the pulsar. Pulsed gamma-ray emission from the pulsar could not be detected. We constrain the cutoff energy of the pulsed spectrum to be less than 27 GeV, assuming that the differential energy spectrum has an exponential cutoff. For a superexponential shape, the cutoff energy can be as high as 60 GeV.
DOI
10.1086/525270
WOS
WOS:000253454500030
Archivio
http://hdl.handle.net/11390/879008
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-40249100783
Diritti
metadata only access
Scopus© citazioni
296
Data di acquisizione
Jun 7, 2022
Vedi dettagli
Web of Science© citazioni
254
Data di acquisizione
Mar 18, 2024
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