VHE $\gamma$-ray discovery and multiwavelength study of the blazar 1ES 2322−409 - Archive ouverte HAL
Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2019

VHE $\gamma$-ray discovery and multiwavelength study of the blazar 1ES 2322−409

H. Abdalla , F. Aharonian , F. Ait Benkhali , E.O. Angüner (1) , M. Arakawa , C. Arcaro , C. Armand (2) , M. Arrieta (3) , M. Backes , M. Barnard , Y. Becherini , J. Becker Tjus , D. Berge , S. Bernhard , K. Bernlöhr , R. Blackwell , M. Böttcher , C. Boisson (3) , J. Bolmont (4) , S. Bonnefoy , P. Bordas , J. Bregeon (5) , F. Brun (6) , P. Brun (7) , M. Bryan , M. Büchele , T. Bulik , T. Bylund , M. Capasso , S. Caroff (2) , A. Carosi (2) , S. Casanova , M. Cerruti (4) , N. Chakraborty , S. Chandra , R.C.G. Chaves (5) , A. Chen , S. Colafrancesco , B. Condon (6) , I.D. Davids , C. Deil , J. Devin (5) , P. Dewilt , L. Dirson , A. Djannati-Ataï (8) , A. Dmytriiev (3) , A. Donath , L.O'C. Drury , J. Dyks , K. Egberts , G. Emery (4) , J.P. Ernenwein (1) , S. Eschbach , S. Fegan (9) , A. Fiasson (2) , G. Fontaine (10) , S. Funk , M. Füssling , S. Gabici (8) , Y.A. Gallant (5) , T. Garrigoux , F. Gaté (2) , G. Giavitto , D. Glawion , J.F. Glicenstein (7) , D. Gottschall , M.H. Grondin (6) , J. Hahn , M. Haupt , G. Heinzelmann , G. Henri (11) , G. Hermann , J.A. Hinton , W. Hofmann , C. Hoischen , T.L. Holch , M. Holler , D. Horns , D. Huber , H. Iwasaki , A. Jacholkowska (4) , M. Jamrozy , D. Jankowsky , F. Jankowsky , L. Jouvin (8) , I. Jung-Richardt , M.A. Kastendieck , K. Katarzyński , M. Katsuragawa , U. Katz , D. Kerszberg (4) , D. Khangulyan , B. Khélifi (8) , J. King , S. Klepser , W. Kluźniak , Nu. Komin , K. Kosack (7) , S. Krakau , M. Kraus , P.P. Krüger , G. Lamanna , J. Lau , J. Lefaucheur (7) , A. Lemière (8) , M. Lemoine-Goumard (6) , J.P. Lenain (4) , E. Leser , T. Lohse , M. Lorentz (7) , R. López-Coto , I. Lypova , D. Malyshev , V. Marandon , Alexandre Marcowith (5) , C. Mariaud (9) , G. Guillem Martí-Devesa , R. Marx , G. Maurin (2) , P.J. Meintjes , A.M.W. Mitchell , R. Moderski , M. Mohamed , L. Mohrmann , E. Moulin (7) , T. Murach , S. Nakashima , M. de Naurois (9) , H. Ndiyavala , F. Niederwanger , J. Niemiec , L. Oakes , P. O'Brien , H. Odaka , S. Ohm , M. Ostrowski , I. Oya , M. Padovani (5) , M. Panter , R.D. Parsons , C. Perennes (4) , P.O. Petrucci (11) , B. Peyaud (7) , Q. Piel (2) , S. Pita (8) , V. Poireau (2) , A. Priyana Noel , D.A. Prokhorov , H. Prokoph , G. Pühlhofer , M. Punch (8) , A. Quirrenbach , S. Raab , R. Rauth , A. Reimer , O. Reimer , Matthieu Renaud (5) , F. Rieger , L. Rinchiuso (12) , C. Romoli , G. Rowell , B. Rudak , E. Ruiz-Velasco , V. Sahakian , S. Saito , D.A. Sanchez (2) , A. Santangelo , M. Sasaki , R. Schlickeiser , F. Schüssler (7) , A. Schulz , U. Schwanke , S. Schwemmer , M. Seglar-Arroyo , M. Senniappan , A.S. Seyffert , N. Shafi , I. Shilon , K. Shiningayamwe , R. Simoni , A. Sinha (8) , H. Sol (3) , F. Spanier , A. Specovius , M. Spir-Jacob (8) , Ł. Stawarz , R. Steenkamp , C. Stegmann , C. Steppa , I. Sushch , T. Takahashi , J.P. Tavernet (4) , T. Tavernier (7) , A.M. Taylor , R. Terrier (10) , L. Tibaldo , D. Tiziani , M. Tluczykont , C. Trichard (9) , M. Tsirou (5) , N. Tsuji , R. Tuffs , Y. Uchiyama , D.J. van Der Walt , C. van Eldik , C. van Rensburg , B. van Soelen , George Vasileiadis (5) , J. Veh , C. Venter , A. Viana , P. Vincent (13) , J. Vink , F. Voisin (8) , H.J. Völk , T. Vuillaume (2) , Z. Wadiasingh , S.J. Wagner , P. Wagner , R.M. Wagner , R. White , A. Wierzcholska , A. Wörnlein , R. Yang , D. Zaborov (1) , M. Zacharias , R. Zanin , A.A. Zdziarski , A. Zech (3) , F. Zefi (9) , A. Ziegler , J. Zorn , N. Żywucka
H. Abdalla
  • Function : Author
F. Aharonian
F. Ait Benkhali
  • Function : Author
M. Arakawa
C. Arcaro
M. Backes
M. Barnard
Y. Becherini
J. Becker Tjus
  • Function : Author
D. Berge
S. Bernhard
  • Function : Author
K. Bernlöhr
R. Blackwell
  • Function : Author
M. Böttcher
C. Boisson
S. Bonnefoy
  • Function : Author
P. Bordas
  • Function : Author
M. Bryan
  • Function : Author
M. Büchele
  • Function : Author
T. Bulik
  • Function : Author
T. Bylund
M. Capasso
  • Function : Author
S. Caroff
S. Casanova
N. Chakraborty
  • Function : Author
S. Chandra
A. Chen
  • Function : Author
S. Colafrancesco
  • Function : Author
I.D. Davids
  • Function : Author
C. Deil
  • Function : Author
P. Dewilt
  • Function : Author
L. Dirson
  • Function : Author
A. Donath
L.O'C. Drury
  • Function : Author
J. Dyks
  • Function : Author
K. Egberts
  • Function : Author
S. Eschbach
  • Function : Author
G. Fontaine
  • Function : Author
S. Funk
  • Function : Author
M. Füssling
  • Function : Author
T. Garrigoux
  • Function : Author
G. Giavitto
D. Glawion
D. Gottschall
  • Function : Author
J. Hahn
  • Function : Author
M. Haupt
  • Function : Author
G. Heinzelmann
  • Function : Author
G. Hermann
  • Function : Author
J.A. Hinton
  • Function : Author
W. Hofmann
  • Function : Author
C. Hoischen
T.L. Holch
  • Function : Author
M. Holler
  • Function : Author
D. Horns
D. Huber
  • Function : Author
H. Iwasaki
  • Function : Author
M. Jamrozy
D. Jankowsky
  • Function : Author
F. Jankowsky
  • Function : Author
L. Jouvin
I. Jung-Richardt
  • Function : Author
M.A. Kastendieck
  • Function : Author
K. Katarzyński
  • Function : Author
M. Katsuragawa
  • Function : Author
U. Katz
D. Khangulyan
B. Khélifi
J. King
  • Function : Author
S. Klepser
W. Kluźniak
  • Function : Author
Nu. Komin
S. Krakau
  • Function : Author
M. Kraus
  • Function : Author
P.P. Krüger
  • Function : Author
G. Lamanna
  • Function : Author
J. Lau
  • Function : Author
E. Leser
  • Function : Author
T. Lohse
R. López-Coto
I. Lypova
  • Function : Author
D. Malyshev
V. Marandon
G. Guillem Martí-Devesa
  • Function : Author
R. Marx
P.J. Meintjes
  • Function : Author
A.M.W. Mitchell
  • Function : Author
R. Moderski
  • Function : Author
M. Mohamed
  • Function : Author
L. Mohrmann
T. Murach
S. Nakashima
  • Function : Author
M. de Naurois
H. Ndiyavala
F. Niederwanger
  • Function : Author
J. Niemiec
L. Oakes
  • Function : Author
P. O'Brien
  • Function : Author
H. Odaka
  • Function : Author
S. Ohm
M. Ostrowski
I. Oya
  • Function : Author
M. Panter
  • Function : Author
R.D. Parsons
  • Function : Author
A. Priyana Noel
  • Function : Author
D.A. Prokhorov
  • Function : Author
H. Prokoph
  • Function : Author
G. Pühlhofer
  • Function : Author
M. Punch
A. Quirrenbach
  • Function : Author
S. Raab
  • Function : Author
R. Rauth
A. Reimer
O. Reimer
  • Function : Author
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
E. Ruiz-Velasco
V. Sahakian
  • Function : Author
S. Saito
  • Function : Author
A. Santangelo
M. Sasaki
R. Schlickeiser
  • Function : Author
A. Schulz
  • Function : Author
U. Schwanke
S. Schwemmer
  • Function : Author
M. Seglar-Arroyo
M. Senniappan
A.S. Seyffert
  • Function : Author
N. Shafi
  • Function : Author
I. Shilon
  • Function : Author
K. Shiningayamwe
  • Function : Author
R. Simoni
  • Function : Author
F. Spanier
  • Function : Author
A. Specovius
  • Function : Author
Ł. Stawarz
  • Function : Author
R. Steenkamp
  • Function : Author
C. Stegmann
  • Function : Author
C. Steppa
I. Sushch
  • Function : Author
T. Takahashi
  • Function : Author
A.M. Taylor
  • Function : Author
R. Terrier
  • Function : Author
L. Tibaldo
  • Function : Author
D. Tiziani
  • Function : Author
M. Tluczykont
  • Function : Author
N. Tsuji
R. Tuffs
  • Function : Author
Y. Uchiyama
  • Function : Author
D.J. van Der Walt
  • Function : Author
C. van Eldik
C. van Rensburg
  • Function : Author
B. van Soelen
J. Veh
  • Function : Author
C. Venter
A. Viana
  • Function : Author
J. Vink
H.J. Völk
  • Function : Author
Z. Wadiasingh
S.J. Wagner
  • Function : Author
P. Wagner
  • Function : Author
R.M. Wagner
  • Function : Author
R. White
  • Function : Author
A. Wierzcholska
A. Wörnlein
  • Function : Author
R. Yang
  • Function : Author
M. Zacharias
R. Zanin
A.A. Zdziarski
  • Function : Author
A. Zech
A. Ziegler
  • Function : Author
J. Zorn
N. Żywucka

Abstract

A hotspot at a position compatible with the BL Lac object 1ES 2322−409 was serendipitously detected with H.E.S.S. during observations performed in 2004 and 2006 on the blazar PKS 2316−423. Additional data on 1ES 2322−409 were taken in 2011 and 2012, leading to a total live-time of 22.3 h. Point-like very-high-energy (VHE; |$E\gt 100\, \mathrm{GeV}$|⁠) γ-ray emission is detected from a source centred on the 1ES 2322−409 position, with an excess of 116.7 events at a significance of 6.0σ. The average VHE γ-ray spectrum is well described with a power law with a photon index Γ = 3.40 ± 0.66_stat ± 0.20_sys and an integral flux |$\Phi (E\gt 200\, \mathrm{GeV}) = (3.11\pm 0.71_{\rm stat}\pm 0.62_{\rm sys})\times 10^{-12} \, \mathrm{cm}^{-2} \, \mathrm{s}^{-1}$|⁠, which corresponds to 1.1 |${{\ \rm per\ cent}}$| of the Crab nebula flux above |$200\, \mathrm{GeV}$|⁠. Multiwavelength data obtained with Fermi LAT, Swift XRT and UVOT, RXTE PCA, ATOM, and additional data from WISE, GROND, and Catalina are also used to characterize the broad-band non-thermal emission of 1ES 2322−409. The multiwavelength behaviour indicates day-scale variability. Swift UVOT and XRT data show strong variability at longer scales. A spectral energy distribution (SED) is built from contemporaneous observations obtained around a high state identified in Swift data. A modelling of the SED is performed with a stationary homogeneous one-zone synchrotron-self-Compton leptonic model. The redshift of the source being unknown, two plausible values were tested for the modelling. A systematic scan of the model parameters space is performed, resulting in a well-constrained combination of values providing a good description of the broad-band behaviour of 1ES 2322−409.
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Dates and versions

hal-01921605 , version 1 (02-06-2023)

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Cite

H. Abdalla, F. Aharonian, F. Ait Benkhali, E.O. Angüner, M. Arakawa, et al.. VHE $\gamma$-ray discovery and multiwavelength study of the blazar 1ES 2322−409. Monthly Notices of the Royal Astronomical Society, 2019, 482 (3), pp.3011-3022. ⟨10.1093/mnras/sty2686⟩. ⟨hal-01921605⟩
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