Exploring the Spectra of Very-High-Energy Gamma-Ray Blazars

Blazars are active galactic nuclei (AGNs) that launch relativistic jets directed toward us and comprise the majority of the detected very-high-energy (VHE) gamma-ray sources. The curvature of blazar’s energy spectrum can give us information about particle acceleration, cooling mechanisms, and gamma-ray propagation, consequently, allowing us to explore the mysteries of the physical mechanisms in jets and the intervening space between the source and the observer. The gamma rays are attenuated through pair production with the extragalactic background light (EBL), leading to electromagnetic cascades that can be affected by the intergalactic magnetic field (IGMF). These effects can be reflected in the curvature of the energy flux spectrum. This study uses data collected by Fermi-LAT and VERITAS observatories over a period of ten years. Fermi-LAT is a space-based observatory that detects gamma rays with energies from 50 MeV to 1 TeV and VERITAS is a ground-based observatory that detects VHE gamma rays with energies from 85 GeV to 30 TeV. Here we present temporal and spectral analyses for a sample of bright TeV blazars, using Bayesian blocks to define periods with steady flux and accounting for the absorption effect from the EBL.