PoS - Proceedings of Science
Volume 401 - High Energy Astrophysics in Southern Africa 2021 (HEASA2021) - Session: Posters
Spectral analysis of S5 1803+784 in the recent flaring state
J. Omojola*, A. Chen  on behalf of the Fermi-LAT Collaboration
Full text: pdf
Published on: May 30, 2022
S5 1803+784 is a low synchrotron peaked (LSP) BL Lac object. Recent multiwavelength studies show no clear correlation between the synchrotron emission and the \gamma-ray emission in this blazar. Unlike most LSP blazars, the spectrum of S5 1803+784 is poorly fitted with a single zone synchrotron self-Compton (SSC) leptonic jet model. We utilize a simple single-zone leptonic jet emission model with external Compton (EC) originating from the dusty torus (DT) to explain the emission and produce the best-fit parameters. The spectral analysis of the blazar in the flaring state reported in Astronomy Telegram (ATel #13633) is studied using data from Fermi-LAT and NED archival data. We verified that the NED archival data are suitable for the spectral analysis of this blazar both during the flare and in the quiescent state by plotting the available synchrotron simultaneous data of the flare period with the NED archival data. The spectral energy distribution (SED) model of the flare and the quiescent state's best-fit parameters are produced using the Jetset code. The results constrain the upper limit of the \gamma-ray emission region length scale, the jet energetics, and the likely acceleration mechanism of the blazar during the flare.
DOI: https://doi.org/10.22323/1.401.0055
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.