Multi Frequency Temporal and Spectral variability study of Blazar PKS 1424-418

TL;DR

This paper analyzes the multi-frequency variability of blazar PKS 1424-418 during flaring episodes, using multi-wavelength data to understand emission regions and mechanisms, and estimates the Doppler factor through spectral modeling.

Contribution

It provides a detailed multi-wavelength study of PKS 1424-418's flaring activity, including spectral energy distribution modeling and emission region analysis, which is novel for this source.

Findings

Identified two gamma-ray flaring episodes.

Estimated Doppler factor > 12 during flares.

Modeled broadband emission with leptonic mechanisms.

Abstract

A study of blazar PKS 1424-418 was carried out using multi waveband data collected by Fermi-LAT, Swift-XRT, Swift-UVOT and SMARTS telescopes between MJD 56000 to MJD 56600 (14 Mar 2012 to 4 Nov 2013). Two flaring episodes were identified by analysing the gamma ray light curve. Simultaneous multi waveband Spectral Energy Distributions (SED) were obtained for those two flaring periods. A cross-correlation analysis of IR-Optical and $\gamma$-ray data suggested the origin of these emissions from the same region. We have set a lower limit for the Doppler factor using the highest energy photon observed from this source during the flaring periods, which should be $>$12. The broadband emission mechanism was studied by modelling the SED using leptonic emission mechanism.