MAGIC detection of short-term variability of the high-peaked BL Lac object 1ES 0806+524

Magic, Collaboration; de O. na Wilhelmi, E.; 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.; González, J. Becerra; 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.; Wilhelmi, E. de O. na; Mendez, C. Delgado; Delgado Mendez, C.; Di Pierro, F.; Dominis Prester, D.; Dorner, D.; Prester, D. Dominis; Doro, M.; Einecke, S.; Eisenacher, D.; Elsaesser, D.; Fernández-Barral, A.; Fidalgo, D.; Fonseca, M. V.; Font, L.; Frantzen, K.; Fruck, C.; Garcia Lopez, R. J.; Galindo, D.; García López, R. J.; Garczarczyk, M.; López, R. J. García; Garrido Terrats, D.; Gaug, M.; Godinovi, N.; Godinović, N.; Gonzalez Munoz, A.; Gozzini, S. R.; Hadasch, D.; Terrats, D. Garrido; Hanabata, Y.; Hayashida, M.; Herrera, J.; Hose, J.; Hrupec, D.; González M. U. noz, A.; Idec, W.; Kadenius, V.; Kellermann, H.; Knoetig, M. L.; Kodani, K.; Konno, Y.; Krause, J.; Kubo, H.; Noz, A. González M.-U.; Kushida, J.; La Barbera, A.; Lelas, D.; Lewandowska, N.; Lindfors, E.; Lombardi, S.; Longo, F.; Lopez, M.; López, M.; Lopez-Coto, R.; López Oramas, A.; Lorenz, E.; Lozano, I.; Makariev, M.; Lopez-Oramas, A.; Mallot, K.; Maneva, G.; Mannheim, K.; Maraschi, L.; Marcote, B.; Mariotti, M.; Martínez, M.; Mazin, D.; López-Coto, R.; Menzel, U.; Miranda, J. M.; Mirzoyan, R.; Moralejo, A.; Munar-Adrover, P.; Nakajima, D.; Neustroev, V.; López-Oramas, A.; Niedzwiecki, A.; Nievas Rosillo, M.; Nilsson, K.; Nishijima, K.; Noda, K.; Orito, R.; Overkemping, A.; Paiano, S.; Palatiello, M.; Rosillo, M. Nievas; Paneque, D.; Paoletti, R.; Paredes, J. M.; Paredes-Fortuny, X.; Persic, M.; Poutanen, J.; Prada Moroni, P. G.; Prandini, E.; Puljak, I.; Reinthal, R.; Rhode, W.; Ribó, M.; Moroni, P. G. Prada; Rico, J.; Rodriguez Garcia, J.; Saito, T.; Saito, K.; Satalecka, K.; Scalzotto, V.; Scapin, V.; Garcia, J. Rodriguez; Schultz, C.; Schweizer, T.; Shore, S. N.; Sillanpää, A.; Sitarek, J.; Snidaric, I.; Sobczynska, D.; Stamerra, A.; Steinbring, T.; Strzys, M.; Takalo, L.; Takami, H.; Tavecchio, F.; Temnikov, P.; Terzi, T.; Terzić, T.; Tescaro, D.; Teshima, M.; Thaele, J.; Torres, D. F.; Toyama, T.; Treves, A.; Vogler, P.; Will, M.; Zanin, R.; Berger, K.; Buson, S.; D'Ammando, F.; Gasparrini, D.; Hovatta, T.; Max-Moerbeck, W.; Readhead, A.; Richards, J.; Aleksić, J.; Aleksi, J.; Aleksi\textquoterightc, J. And Ansoldi S And Biasuzzi B And Overkemping A And Paiano S And Palatiello M And Paneque D And Paoletti R And Paredes J-M. And Paredes-Fortuny X And Persic M And Poutanen J And Prada Moroni P-G. And Biland A And Prandini E And Puljak I And Reinthal R An

Published in

Oxford University Press (OUP), Monthly Notices of the Royal Astronomical Society, 1(451), p. 739-750

DOI: 10.1093/mnras/stv895

Tools

Export citation

Search in Google Scholar

MAGIC detection of short-term variability of the high-peaked BL Lac object 1ES 0806+524

Journal article published in 2015 by Collaboration Magic, E. de O. na Wilhelmi, S. Ansoldi, L. A. Antonelli

, P. Antoranz, A. Babic, P. Bangale, J. A. Barrio

, J. Becerra González

, W. Bednarek, E. Bernardini

, B. Biasuzzi, A. Biland, O. Blanch, S. Bonnefoy and other authors.

This paper is available in a repository.

Full text: Download

Preprint: archiving allowed

Upload

Postprint: archiving allowed

Upload

Published version: archiving allowed

Upload

Policy details

Data provided by

Abstract

The high-frequency-peaked BL Lac (HBL) 1ES 0806+524 (z = 0.138) was discovered in 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 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 9.9 $σ$. 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. ; Comment: 12 pages, 8 figures, 3 tables, accepted 2015 April 20 for publication in Monthly Notices of the Royal Astronomical Society Main Journal

Published in

Links

Tools

MAGIC detection of short-term variability of the high-peaked BL Lac object 1ES 0806+524

Abstract