Bibcode
Ansoldi, S.; Antonelli, L. A.; Antoranz, P.; Babic, A.; Bangale, P.; Barres de Almeida, U.; Barrio, J. A.; Becerra González, J.; Bednarek, W.; Bernardini, E.; Biasuzzi, B.; Biland, A.; Blanch, O.; Bonnefoy, S.; Bonnoli, G.; Borracci, F.; Bretz, T.; Carmona, E.; Carosi, A.; Colin, P.; Colombo, E.; Contreras, J. L.; Cortina, J.; Covino, S.; Da Vela, P.; Dazzi, F.; De Angelis, A.; De Caneva, G.; De Lotto, B.; de Oña Wilhelmi, E.; Delgado Mendez, C.; Di Pierro, F.; Dominis Prester, D.; Dorner, D.; Doro, M.; Einecke, S.; Eisenacher Glawion, D.; Elsaesser, D.; Fernández-Barral, A.; Fidalgo, D.; Fonseca, M. V.; Font, L.; Frantzen, K.; Fruck, C.; Galindo, D.; García López, R. J.; Garczarczyk, M.; Garrido Terrats, D.; Gaug, M.; Godinović, N.; González Muñoz, A.; Gozzini, S. R.; Hanabata, Y.; Hayashida, M.; Herrera, J.; Hirotani, K.; Hose, J.; Hrupec, D.; Hughes, G.; Idec, W.; Kellermann, H.; Knoetig, M. L.; Kodani, K.; Konno, Y.; Krause, J.; Kubo, H.; Kushida, J.; La Barbera, A.; Lelas, D.; Lewandowska, N.; Lindfors, E.; Lombardi, S.; Longo, F.; López, M.; López-Coto, R.; López-Oramas, A.; Lorenz, E.; Makariev, M.; Mallot, K.; Maneva, G.; Mannheim, K.; Maraschi, L.; Marcote, B.; Mariotti, M.; Martínez, M.; Mazin, D.; Menzel, U.; Miranda, J. M.; Mirzoyan, R.; Moralejo, A.; Munar-Adrover, P.; Nakajima, D.; Neustroev, V.; Niedzwiecki, A.; Nevas Rosillo, M.; Nilsson, K.; Nishijima, K.; Noda, K.; Orito, R.; Overkemping, A. et al.
Bibliographical reference
Astronomy and Astrophysics, Volume 585, id.A133, 6 pp.
Advertised on:
1
2016
Journal
Citations
106
Refereed citations
77
Description
Aims: We investigate the extension of the very high-energy
spectral tail of the Crab Pulsar at energies above 400 GeV.
Methods: We analyzed ~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 70 GeV up to
1.5 TeV and connect smoothly with the spectra measured above 10 GeV 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 5 ×
106. 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.