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

M. Ribó; M. Strzys; T. Hovatta; X. Paredes-Fortuny; S. R. Gozzini; E. Lindfors; F. Borracci; S. Buson; H. Kellermann; K. Saito; T. Saito; P. Temnikov; J. A. Barrio; M. Nievas Rosillo; A. Carosi; J. Rodriguez Garcia; T. Bretz; M. Garczarczyk; R. Orito; D. Lelas; J. M. Miranda; V. Neustroev; M. Makariev; P. Da Vela; K. Nishijima; M. V. Fonseca; P. Bangale; R. Reinthal; K. Nilsson; V. Scalzotto; B. Biasuzzi; P. Vogler; M. Gaug; H. Takami; K. Mannheim; E. Carmona; J. Hose; A. De Angelis; E. Colombo; R. J. García López; D. Gasparrini; E. Bernardini; J. Krause; D. Dominis Prester; L. Maraschi; V. Kadenius; M. Teshima; A. González Muñoz; J. Rico; S. Bonnefoy; J. Kushida; K. Kodani; D. Galindo; F. Longo; J. M. Paredes; C. Fruck; R. Mirzoyan; E. Prandini; K. Mallot; A. La Barbera; †; M. L. Knoetig; P. Colin; D. Sobczynska; T. Steinbring; J. Poutanen; B. Marcote; B. De Lotto; A. Babic; G. Maneva; M. Martínez; W. Idec; P. Antoranz; M. Doro; H. Kubo; F. Di Pierro; A. Fernández-Barral; T. Terzić; M. Palatiello; A. Sillanpää; D. Tescaro; I. Lozano; P. Munar-Adrover; K. Satalecka; G. Bonnoli; E. de Oña Wilhelmi; F. D'Ammando; G. De Caneva; L. Font; O. Blanch; A. Stamerra; Y. Hanabata; N. Godinović; R. Zanin; M. Mariotti; P. G. Prada Moroni; L. Takalo; D. Hadasch; D. Dorner; M. Hayashida; N. Lewandowska; A. Readhead; J. L. Contreras; W. Rhode; D. F. Torres; S. Lombardi; C. Schultz; W. Bednarek; M. Will; K. Berger; S. N. Shore; J. Becerra González; D. Paneque; J. Richards; F. Dazzi; I. Snidaric; T. Toyama; W. Max-Moerbeck; Y. Konno; K. Noda; V. Scapin; D. Nakajima; S. Covino; J. Aleksić; E. Lorenz; D. Elsaesser; I. Puljak; M. López; A. Biland; R. López-Coto; J. Thaele; A. Overkemping; S. Einecke; F. Tavecchio; M. Persic; K. Frantzen; J. Sitarek; A. Treves; A. López-Oramas; U. Menzel; A. Niedzwiecki; L. A. Antonelli; S. Ansoldi; D. Hrupec; T. Schweizer; D. Fidalgo; S. Paiano; D. Eisenacher; D. Garrido Terrats; R. Paoletti; J. Herrera; J. Cortina; A. Moralejo; C. Delgado Mendez; D. Mazin

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

M. Ribó
M. Strzys
T. Hovatta
X. Paredes-Fortuny
S. R. Gozzini
E. Lindfors
F. Borracci
S. Buson
H. Kellermann
K. Saito
T. Saito
P. Temnikov
J. A. Barrio
M. Nievas Rosillo
A. Carosi
J. Rodriguez Garcia
T. Bretz
M. Garczarczyk
R. Orito
D. Lelas
J. M. Miranda
V. Neustroev
M. Makariev
P. Da Vela
K. Nishijima
M. V. Fonseca
P. Bangale
R. Reinthal
K. Nilsson
V. Scalzotto
B. Biasuzzi
P. Vogler
M. Gaug
H. Takami
K. Mannheim
E. Carmona
J. Hose
A. De Angelis
E. Colombo
R. J. García López
D. Gasparrini
E. Bernardini
J. Krause
D. Dominis Prester
L. Maraschi
V. Kadenius
M. Teshima
A. González Muñoz
J. Rico
S. Bonnefoy
J. Kushida
K. Kodani
D. Galindo
F. Longo
J. M. Paredes
C. Fruck
R. Mirzoyan
E. Prandini
K. Mallot
A. La Barbera
†
M. L. Knoetig
P. Colin
D. Sobczynska
T. Steinbring
J. Poutanen
B. Marcote
B. De Lotto
A. Babic
G. Maneva
M. Martínez
W. Idec
P. Antoranz
M. Doro
H. Kubo
F. Di Pierro
A. Fernández-Barral
T. Terzić
M. Palatiello
A. Sillanpää
D. Tescaro
I. Lozano
P. Munar-Adrover
K. Satalecka
G. Bonnoli
E. de Oña Wilhelmi
F. D'Ammando
G. De Caneva
L. Font
O. Blanch
A. Stamerra
Y. Hanabata
N. Godinović
R. Zanin
M. Mariotti
P. G. Prada Moroni
L. Takalo
D. Hadasch
D. Dorner
M. Hayashida
N. Lewandowska
A. Readhead
J. L. Contreras
W. Rhode
D. F. Torres
S. Lombardi
C. Schultz
W. Bednarek
M. Will
K. Berger
S. N. Shore
J. Becerra González
D. Paneque
J. Richards
F. Dazzi
I. Snidaric
T. Toyama
W. Max-Moerbeck
Y. Konno
K. Noda
V. Scapin
D. Nakajima
S. Covino
J. Aleksić
E. Lorenz
D. Elsaesser
I. Puljak
M. López
A. Biland
R. López-Coto
J. Thaele
A. Overkemping
S. Einecke
F. Tavecchio
M. Persic
K. Frantzen
J. Sitarek
A. Treves
A. López-Oramas
U. Menzel
A. Niedzwiecki
L. A. Antonelli
S. Ansoldi
D. Hrupec
T. Schweizer
D. Fidalgo
S. Paiano
D. Eisenacher
D. Garrido Terrats
R. Paoletti
J. Herrera
J. Cortina
A. Moralejo
C. Delgado Mendez
D. Mazin
Katso/Avaa
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. (1.561Mb)
Lataukset: 

OXFORD UNIV PRESS
doi:10.1093/mnras/stv895
URI
http://arxiv.org/abs/1504.06115
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Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042713589
Tiivistelmä


The high-frequency-peaked BL Lac (HBL) 1ES 0806+524 (z = 0.138) was discovered in very high energy (VHE) gamma-rays in 2008. Until now, the broad-band spectrum of lES 0806+524 has been only poorly characterized, in particular at high energies. We analysed multiwave-length observations from gamma-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 ES 0806+524 to date. The stereoscopic Major Atmospheric Gamma-Ray Imaging Cherenkov (MAGIC) observations yielded a gamma-ray signal above 250 GeV of (3.7 +/- 0.7) per cent of the Crab Nebula flux with a statistical significance of 9.9a. The multiwavelength observations showed significant variability in essentially all energy bands, including a VHE gamma-ray flare that lasted less than one night, which provided unprecedented evidence for short-term variability in lES 0806+524. The spectrum of this flare is well described by a power law with a photon index of 2.97 +/- 0.29 between similar to 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 lES 0806+524 is not substantially different from the HBLs previously detected.

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