Bibcode
Aleksić, J.; Alvarez, E. A.; Antonelli, L. A.; Antoranz, P.; Asensio, M.; Backes, M.; Barrio, J. A.; Bastieri, D.; Becerra-González, J.; Bednarek, W.; Berdyugin, A.; Berger, K.; Bernardini, E.; Biland, A.; Blanch, O.; Bock, R. K.; Boller, A.; Bonnoli, G.; Borla Tridon, D.; Braun, I.; Bretz, T.; Cañellas, A.; Carmona, E.; Carosi, A.; Colin, P.; Colombo, E.; Contreras, J. L.; Cortina, J.; Cossio, L.; Covino, S.; Dazzi, F.; de Angelis, A.; de Caneva, G.; de Cea Del Pozo, E.; de Lotto, B.; Delgado-Mendez, C.; Diago-Ortega, A.; Doert, M.; Domínguez, A.; Dominis Prester, D.; Dorner, D.; Doro, M.; Eisenacher, D.; Elsaesser, D.; Ferenc, D.; Fonseca, M. V.; Font, L.; Fruck, C.; García-López, R. J.; Garczarczyk, M.; Garrido, D.; Giavitto, G.; Godinović, N.; Hadasch, D.; Häfner, D.; Herrero, A.; Hildebrand, D.; Höhne-Mönch, D.; Hose, J.; Hrupec, D.; Jogler, T.; Kellermann, H.; Klepser, S.; Krähenbühl, T.; Krause, J.; Kushida, J.; La Barbera, A.; Lelas, D.; Leonardo, E.; Lewandowska, N.; Lindfors, E.; Lombardi, S.; López, M.; López-Oramas, A.; Lorenz, E.; Makariev, M.; Maneva, G.; Mankuzhiyil, N.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martínez, M.; Mazin, D.; Meucci, M.; Miranda, J. M.; Mirzoyan, R.; Moldón, J.; Moralejo, A.; Munar-Adrover, P.; Niedzwiecki, A.; Nieto, D.; Nilsson, K.; Nowak, N.; Orito, R.; Paneque, D.; Paoletti, R.; Pardo, S.; Paredes, J. M.; Partini, S.; Perez-Torres, M. A. et al.
Bibliographical reference
Astronomy and Astrophysics, Volume 540, id.A69
Advertised on:
4
2012
Journal
Citations
104
Refereed citations
70
Description
We use 73 h of stereoscopic data taken with the MAGIC telescopes to
investigate the very high-energy (VHE) gamma-ray emission of the Crab
pulsar. Our data show a highly significant pulsed signal in the energy
range from 50 to 400 GeV in both the main pulse (P1) and the interpulse
(P2) phase regions. We provide the widest spectra to date of the VHE
components of both peaks, and these spectra extend to the energy range
of satellite-borne observatories. The good resolution and background
rejection of the stereoscopic MAGIC system allows us to cross-check the
correctness of each spectral point of the pulsar by comparison with the
corresponding (strong and well-known) Crab nebula flux. The spectra of
both P1 and P2 are compatible with power laws with photon indices of 4.0
± 0.8 (P1) and 3.42 ± 0.26 (P2), respectively, and the
ratio P1/P2 between the photon counts of the two pulses is 0.54 ±
0.12. The VHE emission can be understood as an additional component
produced by the inverse Compton scattering of secondary and tertiary
e± pairs on IR-UV photons.
Related projects
Particle Astrophysics
The MAGIC Collaboration is integrated by 20 research institutes and university departments from Armenia, Bulgaria, Finland, Germany, Italy, Poland, Spain, Switzerland and USA. The collaboration comprises two 17m diameter telescopes, located at the Roque de los Muchachos Observatory, designed to measure the Cherenkov radiation associated with
Ramón
García López