Spectroscopic analysis and modeling of quasar 3C-279

We analyze the X-ray and ultraviolet emission of the AGN 3C-279 using Swift data. Located 5 billion light-years away at a redshift distance of Z=0.537, 3C-279 is a bright AGN powered by a relativistic jet from its supermassive black hole and served as a calibration source for the EHT’s first black hole image. We model the spectral emission of 3C-279 in the 0.3–6 keV range to study its luminosity evolution before, during, and after a GRB event, comparing our results with those in the previous literature. Five Swift datasets were processed with HEASARC software, using XRT and UVOT data to characterize X-ray and UV behavior. The results confirm expected luminosity peaks and flare activity, consistent with published studies, demonstrating the capability of XRT and UVOT to probe low- to mid-energy X-ray and UV phenomena.