Show simple item record

dc.contributor.authorAbramowski, A.
dc.contributor.authorCasanova, S.
dc.contributor.authorKrüger, P.P.
dc.contributor.authorPekeur, N.W.
dc.contributor.authorSushch, I.
dc.contributor.authorVenter, C.
dc.contributor.authorVorster, M.
dc.contributor.authorH.E.S.S. Collaboration
dc.date.accessioned2016-05-27T13:53:17Z
dc.date.available2016-05-27T13:53:17Z
dc.date.issued2013
dc.identifier.citationAbramowski, A. et al. 2013. Discovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9-185406. Astronomy & astrophysics, 554: Article no A72. [https://doi.org/10.1051/0004-6361/201220996]en_US
dc.identifier.issn0004-6361
dc.identifier.issn1432-0746 (Online)
dc.identifier.urihttp://hdl.handle.net/10394/17534
dc.identifier.urihttp://www.aanda.org/articles/aa/pdf/2013/06/aa20996-12.pdf
dc.identifier.urihttps://doi.org/10.1051/0004-6361/201220996
dc.description.abstractThe 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 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 of HBLs detected at VHE, with a particle-dominated jet.en_US
dc.language.isoenen_US
dc.publisherEDP Sciencesen_US
dc.subjectBL Lacertae objects: individual: SHBL J001355.9-185406en_US
dc.subjectgamma rays: generalen_US
dc.titleDiscovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9-185406en_US
dc.typeArticleen_US
dc.contributor.researchID22050574 - Pekeur, Nicolette Whilna
dc.contributor.researchID12006653 - Venter, Christo
dc.contributor.researchID12792322 - Vorster, Michael Johannes
dc.contributor.researchID24922986 - Sushch, Iurii
dc.contributor.researchID11749903 - Krüger, Petrus Paulus
dc.contributor.researchID23909196 - Casanova, Sabrina


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record