An intermittent extreme BL Lac: MWL study of 1ES 2344+514 in an enhanced state
K Sedlaczek; D Mazin; D Depaoli; A Chilingaryan; M Hütten; S Ansoldi; J Buss; M Balbo; G Busetto; M Klinger; P G Prada Moroni; C Fruck; J Sitarek; D Hrupec; M Nöthe; U Barres de Almeida; S Covino; M Doro; P Munar-Adrover; W Zheng; M Cerruti; M Ribó; B De Lotto; J A Barrio; P Majumdar; E Do Souto Espiñeira; D Kerszberg; D Strom; M Beck; W Bednarek; A Babić; D Morcuende; V Verguilov; E Molina; Y Kobayashi; M Blank; Y Suda; S M Colak; M Strzys; L Tani; M Garczarczyk; E Lindfors; A Lamastra; T Inada; D Neise; Y Chai; Y Kajiwara; M Gaug; P Da Vela; E Bernardini; S Mender; M Vazquez Acosta; S Sakurai; D Sobczynska; K Mannheim; J Becerra González; T Hovatta; J Rico; K Nishijima; A Paravac; T Oka; I Šnidarić; O Blanch; L Bellizzi; D Hildebrand; M Villata; C Bigongiari; A Arbet Engels; P Peñil; N Torres-Albà; M V Fonseca; F Tavecchio; H Kubo; J Kushida; M Teshima; A Stamerra; G Vanzo; D Miceli; C M Raiteri; F Di Pierro; A Hahn; M Mallamaci; J Hoang; C Maggio; T Bretz; J Herrera; A Moralejo; L Di Venere; E Colombo; G Ceribella; M Manganaro; V Fallah Ramazani; N Giglietto; M Delfino; I Vovk; R Iotov; B Machado de Oliveira Fraga; J M Miranda; K Schmidt; R Paoletti; Ž Bošnjak; A Donini; F Theissen; D Dominis Prester; M Will; A V Filippenko; S Cikota; P Gliwny; J Otero-Santos; M Makariev; K Ishio; M Takahashi; T Miener; W Rhode; T Saito; A Spolon; J M Paredes; C F Vigorito; S Loporchio; G Ferrara; M Peresano; M Persic; P Temnikov; M Bulinski; T Schweizer; N Godinović; R Carosi; FACT Collaboration: D Baack; Y Ohtani; S Fukami; R Mirzoyan; B Schleicher; V Moreno; J Delgado; K Noda; S Inoue; D Ninci; MWL Collaborators: J Acosta Pulido; F Longo; V Sliusar; R Walter; S Achim Mueller; A De Angelis; D Green; S Mićanović; J van Scherpenberg; T Terzić; J Besenrieder; M Mariotti; C Nigro; A López-Oramas; T Surić; F Leone; S Gasparyan; L Tosti; S Paiano; A Biland; L Pavletić; L A Antonelli; L Font; S Nozaki; R J García López; R López-Coto; M Minev; L Maraschi; V D’Elia; A Shukla; S Kiehlmann; A Rugliancich; V M Larionov; N Sahakyan; D Zarić; L Nogués; E Moretti; D Hadasch; U Colin; I Puljak; V A Acciari; G Bonnoli; C Righi; Y Iwamura; J Cortina; W Max-Moerbeck; M Doerr; E Prandini; G Maneva; J L Contreras; M Martínez; M Šegon; K Satalecka; F Dazzi; D Lelas; A C S Readhead; L Foffano; V Neustroev; M López; L Jouvin; S Ventura; A Neronov; M Palatiello; A Fattorini; D Paneque; K Nilsson; V Vitale; N Biederbeck; S Lombardi; D Elsaesser; W Bhattacharyya; B Banerjee; F Giordano; A Berti; D Dorner; L Saha; K Bruegge
An intermittent extreme BL Lac: MWL study of 1ES 2344+514 in an enhanced state
K Sedlaczek
D Mazin
D Depaoli
A Chilingaryan
M Hütten
S Ansoldi
J Buss
M Balbo
G Busetto
M Klinger
P G Prada Moroni
C Fruck
J Sitarek
D Hrupec
M Nöthe
U Barres de Almeida
S Covino
M Doro
P Munar-Adrover
W Zheng
M Cerruti
M Ribó
B De Lotto
J A Barrio
P Majumdar
E Do Souto Espiñeira
D Kerszberg
D Strom
M Beck
W Bednarek
A Babić
D Morcuende
V Verguilov
E Molina
Y Kobayashi
M Blank
Y Suda
S M Colak
M Strzys
L Tani
M Garczarczyk
E Lindfors
A Lamastra
T Inada
D Neise
Y Chai
Y Kajiwara
M Gaug
P Da Vela
E Bernardini
S Mender
M Vazquez Acosta
S Sakurai
D Sobczynska
K Mannheim
J Becerra González
T Hovatta
J Rico
K Nishijima
A Paravac
T Oka
I Šnidarić
O Blanch
L Bellizzi
D Hildebrand
M Villata
C Bigongiari
A Arbet Engels
P Peñil
N Torres-Albà
M V Fonseca
F Tavecchio
H Kubo
J Kushida
M Teshima
A Stamerra
G Vanzo
D Miceli
C M Raiteri
F Di Pierro
A Hahn
M Mallamaci
J Hoang
C Maggio
T Bretz
J Herrera
A Moralejo
L Di Venere
E Colombo
G Ceribella
M Manganaro
V Fallah Ramazani
N Giglietto
M Delfino
I Vovk
R Iotov
B Machado de Oliveira Fraga
J M Miranda
K Schmidt
R Paoletti
Ž Bošnjak
A Donini
F Theissen
D Dominis Prester
M Will
A V Filippenko
S Cikota
P Gliwny
J Otero-Santos
M Makariev
K Ishio
M Takahashi
T Miener
W Rhode
T Saito
A Spolon
J M Paredes
C F Vigorito
S Loporchio
G Ferrara
M Peresano
M Persic
P Temnikov
M Bulinski
T Schweizer
N Godinović
R Carosi
FACT Collaboration: D Baack
Y Ohtani
S Fukami
R Mirzoyan
B Schleicher
V Moreno
J Delgado
K Noda
S Inoue
D Ninci
MWL Collaborators: J Acosta Pulido
F Longo
V Sliusar
R Walter
S Achim Mueller
A De Angelis
D Green
S Mićanović
J van Scherpenberg
T Terzić
J Besenrieder
M Mariotti
C Nigro
A López-Oramas
T Surić
F Leone
S Gasparyan
L Tosti
S Paiano
A Biland
L Pavletić
L A Antonelli
L Font
S Nozaki
R J García López
R López-Coto
M Minev
L Maraschi
V D’Elia
A Shukla
S Kiehlmann
A Rugliancich
V M Larionov
N Sahakyan
D Zarić
L Nogués
E Moretti
D Hadasch
U Colin
I Puljak
V A Acciari
G Bonnoli
C Righi
Y Iwamura
J Cortina
W Max-Moerbeck
M Doerr
E Prandini
G Maneva
J L Contreras
M Martínez
M Šegon
K Satalecka
F Dazzi
D Lelas
A C S Readhead
L Foffano
V Neustroev
M López
L Jouvin
S Ventura
A Neronov
M Palatiello
A Fattorini
D Paneque
K Nilsson
V Vitale
N Biederbeck
S Lombardi
D Elsaesser
W Bhattacharyya
B Banerjee
F Giordano
A Berti
D Dorner
L Saha
K Bruegge
OXFORD UNIV PRESS
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042827411
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.
Kokoelmat
- Rinnakkaistallenteet [19207]