An intermittent extreme BL Lac: MWL study of 1ES 2344+514 in an enhanced state

V A Acciari; S Ansoldi; L A Antonelli; A Arbet Engels; A Babić; B Banerjee; U Barres de Almeida; J A Barrio; J Becerra González; W Bednarek; L Bellizzi; E Bernardini; A Berti; J Besenrieder; W Bhattacharyya; C Bigongiari; O Blanch; G Bonnoli; Ž Bošnjak; G Busetto; R Carosi; G Ceribella; M Cerruti; Y Chai; A Chilingaryan; S Cikota; S M Colak; U Colin; E Colombo; J L Contreras; J Cortina; S Covino; V D’Elia; P Da Vela; F Dazzi; A De Angelis; B De Lotto; M Delfino; J Delgado; D Depaoli; F Di Pierro; L Di Venere; E Do Souto Espiñeira; D Dominis Prester; A Donini; M Doro; D Elsaesser; V Fallah Ramazani; A Fattorini; G Ferrara; L Foffano; M V Fonseca; L Font; C Fruck; S Fukami; R J García López; M Garczarczyk; S Gasparyan; M Gaug; N Giglietto; F Giordano; N Godinović; P Gliwny; D Green; D Hadasch; A Hahn; J Herrera; J Hoang; D Hrupec; M Hütten; T Inada; S Inoue; K Ishio; Y Iwamura; L Jouvin; Y Kajiwara; D Kerszberg; Y Kobayashi; H Kubo; J Kushida; A Lamastra; D Lelas; F Leone; E Lindfors; S Lombardi; F Longo; M López; R López-Coto; A López-Oramas; S Loporchio; B Machado de Oliveira Fraga; C Maggio; P Majumdar; M Makariev; M Mallamaci; G Maneva; M Manganaro; L Maraschi; M Mariotti; M Martínez; D Mazin; S Mender; S Mićanović; D Miceli; T Miener; M Minev; J M Miranda; R Mirzoyan; E Molina; A Moralejo; D Morcuende; V Moreno; E Moretti; P Munar-Adrover; V Neustroev; C Nigro; K Nilsson; D Ninci; K Nishijima; K Noda; L Nogués; S Nozaki; Y Ohtani; T Oka; J Otero-Santos; S Paiano; M Palatiello; D Paneque; R Paoletti; J M Paredes; L Pavletić; P Peñil; M Peresano; M Persic; P G Prada Moroni; E Prandini; I Puljak; M Ribó; J Rico; C Righi; A Rugliancich; L Saha; N Sahakyan; T Saito; S Sakurai; K Satalecka; B Schleicher; K Schmidt; T Schweizer; J Sitarek; I Šnidarić; D Sobczynska; A Spolon; A Stamerra; D Strom; M Strzys; Y Suda; T Surić; M Takahashi; F Tavecchio; P Temnikov; T Terzić; M Teshima; N Torres-Albà; L Tosti; J van Scherpenberg; G Vanzo; M Vazquez Acosta; S Ventura; V Verguilov; C F Vigorito; V Vitale; I Vovk; M Will; D Zarić; FACT Collaboration: D Baack; M Balbo; M Beck; N Biederbeck; A Biland; M Blank; T Bretz; K Bruegge; M Bulinski; J Buss; M Doerr; D Dorner; D Hildebrand; R Iotov; M Klinger; K Mannheim; S Achim Mueller; D Neise; A Neronov; M Nöthe; A Paravac; W Rhode; B Schleicher; K Sedlaczek; A Shukla; V Sliusar; L Tani; F Theissen; R Walter; MWL Collaborators: J Acosta Pulido; A V Filippenko; T Hovatta; S Kiehlmann; V M Larionov; W Max-Moerbeck; C M Raiteri; A C S Readhead; M Šegon; M Villata; W Zheng
An intermittent extreme BL Lac: MWL study of 1ES 2344+514 in an enhanced state

V A Acciari
S Ansoldi
L A Antonelli
A Arbet Engels
A Babić
B Banerjee
U Barres de Almeida
J A Barrio
J Becerra González
W Bednarek
L Bellizzi
E Bernardini
A Berti
J Besenrieder
W Bhattacharyya
C Bigongiari
O Blanch
G Bonnoli
Ž Bošnjak
G Busetto
R Carosi
G Ceribella
M Cerruti
Y Chai
A Chilingaryan
S Cikota
S M Colak
U Colin
E Colombo
J L Contreras
J Cortina
S Covino
V D’Elia
P Da Vela
F Dazzi
A De Angelis
B De Lotto
M Delfino
J Delgado
D Depaoli
F Di Pierro
L Di Venere
E Do Souto Espiñeira
D Dominis Prester
A Donini
M Doro
D Elsaesser
V Fallah Ramazani
A Fattorini
G Ferrara
L Foffano
M V Fonseca
L Font
C Fruck
S Fukami
R J García López
M Garczarczyk
S Gasparyan
M Gaug
N Giglietto
F Giordano
N Godinović
P Gliwny
D Green
D Hadasch
A Hahn
J Herrera
J Hoang
D Hrupec
M Hütten
T Inada
S Inoue
K Ishio
Y Iwamura
L Jouvin
Y Kajiwara
D Kerszberg
Y Kobayashi
H Kubo
J Kushida
A Lamastra
D Lelas
F Leone
E Lindfors
S Lombardi
F Longo
M López
R López-Coto
A López-Oramas
S Loporchio
B Machado de Oliveira Fraga
C Maggio
P Majumdar
M Makariev
M Mallamaci
G Maneva
M Manganaro
L Maraschi
M Mariotti
M Martínez
D Mazin
S Mender
S Mićanović
D Miceli
T Miener
M Minev
J M Miranda
R Mirzoyan
E Molina
A Moralejo
D Morcuende
V Moreno
E Moretti
P Munar-Adrover
V Neustroev
C Nigro
K Nilsson
D Ninci
K Nishijima
K Noda
L Nogués
S Nozaki
Y Ohtani
T Oka
J Otero-Santos
S Paiano
M Palatiello
D Paneque
R Paoletti
J M Paredes
L Pavletić
P Peñil
M Peresano
M Persic
P G Prada Moroni
E Prandini
I Puljak
M Ribó
J Rico
C Righi
A Rugliancich
L Saha
N Sahakyan
T Saito
S Sakurai
K Satalecka
B Schleicher
K Schmidt
T Schweizer
J Sitarek
I Šnidarić
D Sobczynska
A Spolon
A Stamerra
D Strom
M Strzys
Y Suda
T Surić
M Takahashi
F Tavecchio
P Temnikov
T Terzić
M Teshima
N Torres-Albà
L Tosti
J van Scherpenberg
G Vanzo
M Vazquez Acosta
S Ventura
V Verguilov
C F Vigorito
V Vitale
I Vovk
M Will
D Zarić
FACT Collaboration: D Baack
M Balbo
M Beck
N Biederbeck
A Biland
M Blank
T Bretz
K Bruegge
M Bulinski
J Buss
M Doerr
D Dorner
D Hildebrand
R Iotov
M Klinger
K Mannheim
S Achim Mueller
D Neise
A Neronov
M Nöthe
A Paravac
W Rhode
B Schleicher
K Sedlaczek
A Shukla
V Sliusar
L Tani
F Theissen
R Walter
MWL Collaborators: J Acosta Pulido
A V Filippenko
T Hovatta
S Kiehlmann
V M Larionov
W Max-Moerbeck
C M Raiteri
A C S Readhead
M Šegon
M Villata
W Zheng
Katso/Avaa
Lataukset: 

OXFORD UNIV PRESS
doi:10.1093/mnras/staa1702
Näytä kaikki kuvailutiedot
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042827411
Tiivistelmä
Extreme high-frequency BL Lacs (EHBL) feature their synchrotron peak of the broad-band spectral energy distribution (SED) at nu(s) >= 10(17) Hz. The BL Lac object 1ES 2344+514 was included in the EHBL family because of its impressive shift of the synchrotron peak in 1996. During the following years, the source appeared to be in a low state without showing any extreme behaviours. In 2016 August, 1ES 2344+514 was detected with the groundbased gamma-ray telescope FACT during a high gamma-ray state, triggering multiwavelength (MWL) observations. We studied the MWL light curves of 1ES 2344+514 during the 2016 flaring state, using data from radio to very-high-energy (VHE) gamma-rays taken with OVRO, KAIT, KVA, NOT, some telescopes of the GASP-WEBT collaboration at the Teide, Crimean, and St. Petersburg observatories, Swift-UVOT, Swift-XRT, Fermi-LAT, FACT, and MAGIC. With simultaneous observations of the flare, we built the broad-band SED and studied it in the framework of a leptonic and a hadronic model. The VHE gamma-ray observations show a flux level of 55 per cent of the Crab Nebula flux above 300 GeV, similar to the historical maximum of 1995. The combination of MAGIC and Fermi-LAT spectra provides an unprecedented characterization of the inverse-Compton peak for this object during a flaring episode. The Gamma index of the intrinsic spectrum in the VHE gamma-ray band is 2.04 +/- 0.12(stat) +/- 0.15(sys). We find the source in an extreme state with a shift of the position of the synchrotron peak to frequencies above or equal to 1018 Hz.
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