 |
Journal articles
Discovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9–185406
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.
Cited literature [32 references]
https://hal-cea.archives-ouvertes.fr/cea-01135393
Contributor : EDP Sciences Connect in order to contact the contributor
Submitted on : Wednesday, March 25, 2015 - 12:17:31 PM
Last modification on : Tuesday, August 2, 2022 - 3:44:44 AM
Long-term archiving on: : Monday, April 17, 2017 - 10:34:18 PM
Contributor : EDP Sciences Connect in order to contact the contributor
Submitted on : Wednesday, March 25, 2015 - 12:17:31 PM
Last modification on : Tuesday, August 2, 2022 - 3:44:44 AM
Long-term archiving on: : Monday, April 17, 2017 - 10:34:18 PM
File
aa20996-12.pdf
Publication funded by an institution