Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/58588
Title: Detection of bridge emission above 50 GeV from the Crab pulsar with the MAGIC telescopes
Author: MAGIC Collaboration
Marcote Martin, Benito
Munar i Adrover, Pere
Paredes i Poy, Josep Maria
Paredes Fortuny, Xavier
Ribó Gomis, Marc
Zanin, Roberta
Keywords: Púlsars
Raigs gamma
Estels
Telescopis
Astrofísica
Pulsars
Gamma rays
Stars
Telescopes
Astrophysics
Issue Date: May-2014
Publisher: Springer Verlag
Abstract: The Crab pulsar is the only astronomical pulsed source detected at very high energy (VHE, E>100GeV) gamma rays. The emission mechanism of VHE pulsation is not yet fully understood, although several theoretical models have been proposed. Aims. In order to test new models, we measured the light curve and the spectra of the Crab pulsar with high precision by means of deep observations. Methods. We analyzed 135 hours of selected MAGIC data taken between 2009 and 2013 in stereoscopic mode. In order to discuss the spectral shape in connection with lower energies, 5.5 years of Fermi-LAT data were also analyzed. Results. The known two pulses per period were detected with a significance of 8.0 σ and 12.6 σ. In addition, significant emission was found between the two pulses with 6.2 σ. Conclusions. We discovered the bridge emission above 50 GeV between the two main pulses. This emission can not be explained with the existing theories. These data can be used for testing new theoretical models.
Note: Versió postprint del document publicat a: http://dx.doi.org/10.1051/0004-6361/201423664
It is part of: Astronomy and Astrophysics, 2014, vol. 565, num. L12, p. 1-5
Related resource: http://dx.doi.org/10.1051/0004-6361/201423664
URI: http://hdl.handle.net/2445/58588
ISSN: 0004-6361
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
Articles publicats en revistes (Física Quàntica i Astrofísica)

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