Bibcode
Aleksić, J.; Antonelli, L. A.; Antoranz, P.; Asensio, M.; Backes, M.; Barres de Almeida, U.; Barrio, J. A.; Becerra González, J.; Bednarek, W.; Berger, K.; Bernardini, E.; Biland, A.; Blanch, O.; Bock, R. K.; Boller, A.; Bonnefoy, S.; Bonnoli, G.; Borla Tridon, D.; Borracci, F.; Bretz, T.; Carmona, E.; Carosi, A.; Carreto Fidalgo, D.; Colin, P.; Colombo, E.; Contreras, J. L.; Cortina, J.; Cossio, L.; Covino, S.; da Vela, P.; Dazzi, F.; de Angelis, A.; de Caneva, G.; de Lotto, B.; Delgado Mendez, C.; Doert, M.; Domínguez, A.; Dominis Prester, D.; Dorner, D.; Doro, M.; Eisenacher, D.; Elsaesser, D.; Farina, E.; Ferenc, D.; Fonseca, M. V.; Font, L.; Fruck, C.; García López, R. J.; Garczarczyk, M.; Garrido Terrats, D.; Gaug, M.; Giavitto, G.; Godinović, N.; González Muñoz, A.; Gozzini, S. R.; Hadamek, A.; Hadasch, D.; Häfner, D.; Herrero, A.; Hose, J.; Hrupec, D.; Idec, W.; Jankowski, F.; Kadenius, V.; Klepser, S.; Knoetig, M. L.; Krähenbühl, T.; Krause, J.; Kushida, J.; La Barbera, A.; Lelas, D.; Lewandowska, N.; Lindfors, E.; Lombardi, S.; López, M.; López-Coto, R.; López-Oramas, A.; Lorenz, E.; Lozano, I.; Makariev, M.; Mallot, K.; Maneva, G.; Mankuzhiyil, N.; Mannheim, K.; Maraschi, L.; Marcote, B.; Mariotti, M.; Martínez, M.; Masbou, J.; Mazin, D.; Meucci, M.; Miranda, J. M.; Mirzoyan, R.; Moldón, J.; Moralejo, A.; Munar-Adrover, P.; Nakajima, D.; Niedzwiecki, A.; Nilsson, K.; Nowak, N. et al.
Bibliographical reference
Astronomy and Astrophysics, Volume 563, id.A90, 6 pp.
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3
2014
Journal
Citations
26
Refereed citations
22
Description
Motivated by the prediction of a high TeV luminosity we investigated
whether the blazar 1ES 1727+502 (z = 0.055) is emitting very high energy
(VHE, E > 100 GeV) γ rays. We observed the BL Lac object 1ES
1727+502 in stereoscopic mode with the two MAGIC telescopes for 14
nights between May 6th and June 10th 2011, for a total effective
observing time of 12.6 h. To study the multiwavelength spectral energy
distribution (SED), we used simultaneous optical R-band data from the
KVA telescope, archival UV/optical and X-ray observations from
instruments UVOT and XRT on board of the Swift satellite, and high
energy (HE, 0.1 GeV-100 GeV) γ-ray data from the Fermi-LAT
instrument. We detected, for the first time, VHE γ-ray emission
from 1ES 1727+502 at a statistical significance of 5.5σ. The
integral flux above 150 GeV is estimated to be (2.1 ± 0.4)% of
the Crab nebula flux and the de-absorbed VHE spectrum has a photon index
of (2.7 ± 0.5). No significant short-term variability was found
in any of the wavebands presented here. We model the SED using a
one-zone synchrotron self-Compton model obtaining parameters typical for
this class of sources.
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