Bibcode
Aleksić, J.; Ansoldi, S.; Antonelli, L. A.; Antoranz, P.; Babic, A.; Bangale, P.; 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, 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.; Hadasch, D.; Hanabata, Y.; Hayashida, M.; Herrera, J.; Hose, J.; Hrupec, D.; Idec, W.; Kadenius, V.; 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.; Lozano, I.; 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.; Nievas Rosillo, M.; Nilsson, K.; Nishijima, K.; Noda, K.; Orito, R. et al.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 451, Issue 1, p.739-750
Fecha de publicación:
7
2015
Número de citas
27
Número de citas referidas
24
Descripción
The high-frequency-peaked BL Lac (HBL) 1ES 0806+524 (z = 0.138) was
discovered in very high energy (VHE) γ-rays in 2008. Until now,
the broad-band spectrum of 1ES 0806+524 has been only poorly
characterized, in particular at high energies. We analysed
multiwavelength observations from γ-rays to radio performed from
2011 January to March, which were triggered by the high activity
detected at optical frequencies. These observations constitute the most
precise determination of the broad-band emission of 1ES 0806+524 to
date. The stereoscopic Major Atmospheric Gamma-Ray Imaging Cherenkov
(MAGIC) observations yielded a γ-ray signal above 250 GeV of (3.7
± 0.7) per cent of the Crab Nebula flux with a statistical
significance of 9.9σ. The multiwavelength observations showed
significant variability in essentially all energy bands, including a VHE
γ-ray flare that lasted less than one night, which provided
unprecedented evidence for short-term variability in 1ES 0806+524. The
spectrum of this flare is well described by a power law with a photon
index of 2.97 ± 0.29 between ˜150 GeV and 1 TeV and an
integral flux of (9.3 ± 1.9) per cent of the Crab nebula flux
above 250 GeV. The spectrum during the non-flaring VHE activity is
compatible with the only available VHE observation performed in 2008
with VERITAS when the source was in a low optical state. The broad-band
spectral energy distribution can be described with a one-zone
synchrotron self-Compton model with parameters typical for HBLs,
indicating that 1ES 0806+524 is not substantially different from the
HBLs previously detected.
Proyectos relacionados
Astrofísica de Partículas
El Grupo de Astrofísica de Partículas del IAC participa activamente en tres grandes colaboraciones internacionales de astrofísica de muy altas energías: AMS (Alpha Magnetic Spectrometer), los telescopios de radiación Cherenkov MAGIC I y II, y el Cherenkov Telescope Array (CTA). AMS es un detector de partículas diseñado para operar en el espacio, a
Ramón
García López