Article 2022 · 5 citations

Multiwavelength temporal and spectral analysis of Blazar S5 1803+78

Priya, Shruti, Prince, Raj, Agarwal, Aditi, Bose, Debanjan, Ozdonmez, Aykut, Ege, Ergun

Abstract

Blazars are a class of AGN, one of their jets is pointed towards the earth. Here, we report about the multiwavelength study for blazar S5 1803+78 between MJD 58727 and MJD 59419. We analysed gamma-ray data collected by Fermi-LAI, X-ray data collected by Swift-XRT & NuSTAR, and optical photons detected by Swift-UVOT & TUBITAK observatory in Turkey. Three flaring states are identified by analysing the gamma-ray light curve. A day-scale variability is observed throughout the flares with the similar rise and decay times suggesting a compact emission region located close to the central engine. Cross-correlation studies are carried out between gamma-ray, radio, and X-ray bands, and no significant correlation is detected. The gamma-ray and optical emission are significantly correlated with zero time lag suggesting a co-spatial origin of them. The broad-band spectral energy distribution (SED) modelling was performed for all the flaring episodes as well as for one quiescent state for comparison. SEDs are best fitted with the synchrotron-self Compton (SSC) model under a one-zone leptonic scenario. The SED modelling shows that to explain the high flaring state, strong Doppler boosting is required.

Keywords

Galaxies: Active BL Lacertae objects galaxies: Jets Gamma-rays Galaxies X-rays Galaxies MULTIBAND OPTICAL VARIABILITY LARGE-AREA TELESCOPE RELATIVISTIC JETS COMPLETE SAMPLE DOPPLER FACTORS BROAD-BAND RAY FLARE 3C 279 X-RAY RADIO

WoS Categories

Astronomy & Astrophysics

Citation

Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Year: 2022
Volume: 513
Issue: 2
Pages: 2239-2251
ISSN: 0035-8711
eISSN: 1365-2966
DOI: 10.1093/mnras/stac1009
WoS UID: WOS:000791556200005

Open via DOI