10 citations · 29 across the 8 of their papers we have counts for
8 papers
Modelling the Time-variable Broadband Emission and Correlation Study of FSRQ S5 1044+71
Sajad Ahanger, Shah Zahir, Sunder Sahayanathan +3
We present a detailed temporal and spectral analysis of the blazar S5\,1044+71 using multi-wavelength data obtained from the \emph{Fermi}-LAT and Swift-XRT/UVOT telescopes. Applyin…
Comprehensive Variability Analysis of Blazars Using Fermi Light Curves Across Multiple Timescales
Zahir Shah, Athar A. Dar, Sikandar Akbar +8
In this study, we conducted a systematic analysis of long-term Fermi-LAT γ-ray data for a sample of blazars, including FSRQs, BL\,Lacs, and BCUs, to investigate their -ray varia…
Statistical Insights into Flux and Photon Index Distributions of VHE FSRQs from Fermi-LAT Observations
Zahoor Malik, Sikandar Akbar, Zahir Shah +8
This study examines the flux and photon index distributions of 11 Very High Energy (VHE) Flat Spectrum Radio Quasars (FSRQs) using over 16 years of Fermi-LAT -ray data. The dist…
Broadband spectral and temporal study of Ton 599 during the brightest January 2023 flare
Aaqib Manzoor, Zahir Shah, Sunder Sahayanathan +2
In this work, we provide a detailed analysis of the broadband temporal and spectral properties of the blazar Ton\,599 by using the observations from \emph{Fermi}-LAT and \emph{Swif…
Understanding the Very High Energy γ-ray excess in nearby blazars using leptonic model
Aaqib Manzoor, Sunder Sahayanathan, Zahir Shah +3
The availability of simultaneous X-ray and Very High Energy (VHE) observations of blazars helps to identify the plausible radiative contributors to the VHE emission. Under leptonic…
Multi-wavelength study of blazar 4C +01.02 during its long-term flaring activity in 2014-2017
Malik Zahoor, Shah Zahir, Sunder Sahayanathan +2
We conducted a detailed long-term spectral and temporal study of flat spectrum radio quasar 4C +01.02, by using the multi-wavelength observations from Fermi-LAT, Swift-XRT, and Swi…
Very High Energy Flat Spectral Radio Quasar Candidates
Zahoor Malik, Sunder Sahayanathan, Zahir Shah +2
The attenuation of very high energy (VHE) photons by the extragalactic background light (EBL) prevents the observation of high redshift flat spectrum radio quasars (FSRQs). However…
Model-independent Redshift Estimation of BL Lac Objects through VHE Observations
Malik Zahoor, Sunder Sahayanathan, Shah Zahir +3
The very high energy (VHE) gamma-ray spectral indices of blazars show strong correlation with the source redshift. Absence of any such correlation in low energy gamma rays and X-ra…