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

A. Abramowski Fabio Acero F. Aharonian 1 A. G. Akhperjanian E. Angüner G. Anton S. Balenderan A. Balzer A. Barnacka Y. Becherini 2 J. Becker Tjus K. Bernlöhr 1 E. Birsin E. Bissaldi J. Biteau 3, * C. Boisson J. Bolmont P. Bordas J. Brucker F. Brun 1 P. Brun 4 T. Bulik S. Carrigan S. Casanova M. Cerruti P. M. Chadwick R. Chalme-Calvet R. C. G. Chaves 4 A. Cheesebrough M. Chrétien S. Colafrancesco G. Cologna J. Conrad C. Couturier M. Dalton M. K. Daniel I. D. Davids B. Degrange C. Deil P. Dewilt H. J. Dickinson A. Djannati-Ataï 2 W. Domainko L. O’c. Drury G. Dubus K. Dutson J. Dyks M. Dyrda T. Edwards K. Egberts P. Eger P. Espigat 2 C. Farnier S. Fegan F. Feinstein M. V. Fernandes D. Fernandez A. Fiasson G. Fontaine A. Förster M. Füßling M. Gajdus Y. A. Gallant T. Garrigoux H. Gast B. Giebels J. F. Glicenstein 4 D. Göring M.-H. Grondin M. Grudzińska S. Häffner J. D. Hague J. Hahn J. Harris G. Heinzelmann G. Henri G. Hermann O. Hervet A. Hillert J. A. Hinton W. Hofmann P. Hofverberg M. Holler D. Horns A. Jacholkowska C. Jahn M. Jamrozy M. Janiak F. Jankowsky I. Jung M. A. Kastendieck K. Katarzyński U. Katz S. Kaufmann B. Khélifi M. Kieffer S. Klepser D. Klochkov W. Kluźniak T. Kneiske D. Kolitzus Nu. Komin K. Kosack 4 S. Krakau F. Krayzel P. P. Krüger H. Laffon G. Lamanna J. Lefaucheur 2 M. Lemoine-Goumard J.-P. Lenain D. Lennarz T. Lohse A. Lopatin C.-C. Lu V. Marandon A. Marcowith G. Maurin N. Maxted M. Mayer T. J. L. Mccomb M. C. Medina 4 J. Méhault U. Menzler M. Meyer R. Moderski M. Mohamed E. Moulin 4 T. Murach C. L. Naumann M. de Naurois D. Nedbal J. Niemiec S. J. Nolan L. Oakes S. Ohm E. de Oña Wilhelmi B. Opitz M. Ostrowski I. Oya M. Panter R. D. Parsons M. Paz Arribas N. W. Pekeur G. Pelletier J. Perez P.-O. Petrucci B. Peyaud 4 S. Pita 2 H. Poon G. Pühlhofer M. Punch 2 A. Quirrenbach S. Raab M. Raue A. Reimer O. Reimer M. Renaud R. de los Reyes F. Rieger L. Rob S. Rosier-Lees G. Rowell B. Rudak C. B. Rulten V. Sahakian D. A. Sanchez⋆ 1, * A. Santangelo R. Schlickeiser F. Schüssler 4 A. Schulz U. Schwanke S. Schwarzburg S. Schwemmer H. Sol G. Spengler F. Spieß Ł. Stawarz R. Steenkamp C. Stegmann F. Stinzing K. Stycz I. Sushch A. Szostek J.-P. Tavernet R. Terrier 2 M. Tluczykont C. Trichard K. Valerius C. van Eldik G. Vasileiadis C. Venter A. Viana 1 P. Vincent H. J. Völk 1 F. Volpe 1 M. Vorster S. J. Wagner P. Wagner M. Ward M. Weidinger R. White A. Wierzcholska P. Willmann A. Wörnlein D. Wouters 4 M. Zacharias A. Zajczyk A. A. Zdziarski A. Zech H.-S. Zechlin
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 GeV) with the Fermi Large Area Telescope (LAT) and the High Energy Stereoscopic System (H.E.S.S.) is reported. Dedicated observations were performed with the H.E.S.S. telescopes, leading to a detection at the 5.5σ significance level. The measured flux above 310 GeV is (8.3 ± 1.7stat ± 1.7sys) × 10-13 photons cm-2 s-1 (about 0.6% of that of the Crab Nebula), and the power-law spectrum has a photon index of Γ = 3.4 ± 0.5stat ± 0.2sys. Using 3.5 years of publicly available Fermi-LAT data, a faint counterpart has been detected in the LAT data at the 5.5σ significance level, with an integrated flux above 300 MeV of (9.3 ± 3.4stat ± 0.8sys) × 10-10 photons cm-2 s-1 and a photon index of Γ = 1.96 ± 0.20stat ± 0.08sys. X-ray observations with Swift-XRT allow the synchrotron peak energy in νFν representation to be located at ~1.0 keV. The broadband spectral energy distribution is modelled with a one-zone synchrotronself-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 of HBLs detected at VHE, with a particle-dominated jet.
Document type :
Journal articles
Complete list of metadatas

Cited literature [32 references]  Display  Hide  Download

https://hal-cea.archives-ouvertes.fr/cea-01135393
Contributor : Edp Sciences <>
Submitted on : Wednesday, March 25, 2015 - 12:17:31 PM
Last modification on : Friday, May 10, 2019 - 1:54:12 PM
Long-term archiving on : Monday, April 17, 2017 - 10:34:18 PM

File

aa20996-12.pdf
Publication funded by an institution

Identifiers

Citation

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, EDP Sciences, 2013, 554, pp.A72. ⟨10.1051/0004-6361/201220996⟩. ⟨cea-01135393⟩

Share

Metrics

Record views

399

Files downloads

260