Conveners
AGN III
- Geoff Beck
We present a comprehensive analysis of the broadband spectral energy distribution (SED) of the extreme high-energy peaked BL Lac (EHBL) source, 1ES 0229+200. Our study utilizes near-simultaneous data collected at various epochs between September 2017 and August 2021 (MJD: 58119−59365) from different instruments, including AstroSat−UVIT, SXT, LAXPC, Swift−UVOT, Fermi-LAT, and MAGIC. We...
Blazars produce highly polarised nonthermal synchrotron emission, detectable from radio to optical-UV/X-ray wavelengths. In contrast, the dusty torus, broad line region, accretion disk, and host galaxy emit unpolarised thermal radiation, which reduces the observed synchrotron polarisation. This effect is often visible as a decline towards shorter wavelengths in the total optical-UV...
We present an analysis of the optical and GeV gamma-ray behaviour of the flat-spectrum radio quasar 3C 279 during four phases of significant gamma-ray flux variability between 2014 – 2019. Multiple flares were observed during this period, with the most rapid flare exhibiting a flux doubling time of 2.66 hr. A ZDCF analysis of the optical and gamma-rays light curves show a near-zero time-lag...
A sample of 143 AGN, mainly Seyfert 1s, has been monitored photometrically (BVugr) using the Las Cumbres Observatory robotic telescope network with a ~1-month cadence for up to three years. While almost all targets show some variation if tracked long enough, the amplitude of the variations appears correlated with some of the AGN spectral characteristics. For example, significantly smaller...
