RT Journal Article
T1 VHE gamma-ray observation of the Crab Nebula and its pulsar with the MAGIC telescope
A1 Antoranz Canales, Pedro
A1 Barrio Uña, Juan Abel
A1 Contreras González, José Luis
A1 Fonseca González, María Victoria
A1 López Moya, Marcos
A1 Miranda Pantoja, José Miguel
A1 Nieto Castaño, Daniel
AB 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.
PB IOP Publishing
SN 0004-637X
YR 2008
FD 2008-02-20
LK https://hdl.handle.net/20.500.14352/50885
UL https://hdl.handle.net/20.500.14352/50885
LA eng
NO © The American Astronomical Society. We are grateful for discussions with Kouichi Hirotani.We also would like to thank the IAC for the excellent working conditions at the ORM in La Palma. The support of the German BMBF and MPG, the Italian INFN, the Spanish CICYT, ETH research grantTH 34/04 3, and the PolishMNiI grant 1P03D01028 is gratefully acknowledged.
NO German BMBF
NO German MPG
NO Italian INFN
NO Spanish CICYT
NO ETH
NO PolishMNiI
DS Docta Complutense
RD 6 abr 2025