Discovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9–185406 - Archive ouverte HAL Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 2013

Discovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9–185406

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A. Abramowski
  • Function : Author
Fabio Acero
F. Aharonian
A. G. Akhperjanian
  • Function : Author
E. Angüner
  • Function : Author
G. Anton
  • Function : Author
S. Balenderan
  • Function : Author
Agnès Balzer
  • Function : Author
A. Barnacka
  • Function : Author
J. Becker Tjus
  • Function : Author
K. Bernlöhr
E. Birsin
  • Function : Author
E. Bissaldi
  • Function : Author
J. Biteau
  • Function : Correspondent author
  • PersonId : 941255

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C. Boisson
P. Bordas
  • Function : Author
J. Brucker
  • Function : Author
F. Brun
P. Brun
T. Bulik
  • Function : Author
S. Carrigan
  • Function : Author
S. Casanova
M. Cerruti
P. M. Chadwick
  • Function : Author
A. Cheesebrough
  • Function : Author
S. Colafrancesco
  • Function : Author
G. Cologna
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J. Conrad
  • Function : Author
M. K. Daniel
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I. D. Davids
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C. Deil
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P. Dewilt
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H. J. Dickinson
  • Function : Author
W. Domainko
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L. O’c. Drury
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G. Dubus
K. Dutson
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J. Dyks
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M. Dyrda
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T. Edwards
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K. Egberts
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P. Eger
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C. Farnier
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S. Fegan
M. V. Fernandes
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A. Fiasson
A. Förster
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M. Füssling
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M. Gajdus
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H. Gast
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D. Göring
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M.-H. Grondin
M. Grudzińska
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S. Häffner
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J. D. Hague
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J. Hahn
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J. Harris
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G. Heinzelmann
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G. Henri
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G. Hermann
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O. Hervet
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A. Hillert
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J. A. Hinton
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W. Hofmann
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P. Hofverberg
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M. Holler
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D. Horns
C. Jahn
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M. Jamrozy
M. Janiak
  • Function : Author
F. Jankowsky
  • Function : Author
I. Jung
M. A. Kastendieck
  • Function : Author
K. Katarzyński
  • Function : Author
U. Katz
S. Kaufmann
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B. Khélifi
S. Klepser
D. Klochkov
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W. Kluźniak
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T. Kneiske
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D. Kolitzus
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K. Kosack
S. Krakau
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P. P. Krüger
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D. Lennarz
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T. Lohse
A. Lopatin
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C.-C. Lu
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V. Marandon
N. Maxted
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M. Mayer
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T. J. L. Mccomb
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U. Menzler
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M. Meyer
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R. Moderski
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M. Mohamed
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Emmanuel Moulin
T. Murach
M. de Naurois
D. Nedbal
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J. Niemiec
S. J. Nolan
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L. Oakes
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S. Ohm
E. de Oña Wilhelmi
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B. Opitz
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M. Ostrowski
I. Oya
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M. Panter
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R. D. Parsons
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M. Paz Arribas
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N. W. Pekeur
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G. Pelletier
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J. Perez
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P.-O. Petrucci
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H. Poon
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G. Pühlhofer
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M. Punch
A. Quirrenbach
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S. Raab
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M. Raue
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A. Reimer
O. Reimer
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R. de Los Reyes
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F. Rieger
L. Rob
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G. Rowell
B. Rudak
C. B. Rulten
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V. Sahakian
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A. Santangelo
R. Schlickeiser
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F. Schüssler
A. Schulz
  • Function : Author
U. Schwanke
S. Schwarzburg
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S. Schwemmer
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H. Sol
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G. Spengler
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F. Spiess
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Ł. Stawarz
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R. Steenkamp
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C. Stegmann
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F. Stinzing
  • Function : Author
K. Stycz
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I. Sushch
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A. Szostek
  • Function : Author
M. Tluczykont
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K. Valerius
  • Function : Author
C. van Eldik
C. Venter
M. Vorster
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S. J. Wagner
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P. Wagner
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M. Ward
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M. Weidinger
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R. White
  • Function : Author
A. Wierzcholska
P. Willmann
  • Function : Author
A. Wörnlein
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M. Zacharias
A. A. Zdziarski
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A. Zech
H.-S. Zechlin
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Abstract

The detection of the high-frequency peaked BL Lac object (HBL) SHBL J001355.9-185406 ($z$=0.095) at high (HE; 100 MeV$<$E$<$300 GeV) and very high-energy (VHE; $E>100\,{\rm GeV}$) with the \fer\ Large Area Telescope (LAT) and the High Energy Stereoscopic System (H.E.S.S.) is reported. Dedicated observations have been performed with the H.E.S.S. telescopes, leading to a detection at the $5.5\,\sigma$ significance level. The measured flux above 310 GeV is $(8.3 \pm 1.7_{\rm{stat}}\pm 1.7_{\rm{sys}})\times 10^{-13}$ photons \cms\ (about 0.6% of that of the Crab Nebula), and the power law spectrum has a photon index of \indexHESS. Using 3.5 years of publicly available \fla\ data, a faint counterpart has been detected in the LAT data at the $5.5\,\sigma$ significance level, with an integrated flux above 300 MeV of $(9.3 \pm 3.4_{\rm stat} \pm 0.8_{\rm sys})\times 10^{-10}$ photons \cms\ and a photon index of $\Gamma = 1.96 \pm 0.20_{\rm stat} \pm 0.08_{\rm sys}$. X-ray observations with \textit{Swift}-XRT allow the synchrotron peak energy in $\nu F_\nu$ representation to be located at $\sim 1.0\,{\rm keV}$. The broadband spectral energy distribution is modelled with a one-zone synchrotron self-Compton (SSC) model and the optical data by a black-body emission describing the thermal emission of the host galaxy. The derived parameters are typical for HBLs detected at VHE, with a particle dominated jet.
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Dates and versions

cea-01135393 , version 1 (25-03-2015)

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A. Abramowski, Fabio Acero, F. Aharonian, A. G. Akhperjanian, E. Angüner, et al.. Discovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9–185406. Astronomy and Astrophysics - A&A, 2013, 554, pp.A72. ⟨10.1051/0004-6361/201220996⟩. ⟨cea-01135393⟩
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