Fractional variability (Fvar) as a function of the energy for Phase A and Phase B. Vertical bars denote 1σ uncertainties. In gray an SED of the source is overlayed (a snapshot of 26 January 2015) to facilitate association of the value of the fractional variability to the corresponding energy band.
Joaquin Weiss
Abstract
In this talk, I will present the research carried out by our group on active galactic nuclei, mainly blazars, based on a long-term optical monitoring program covering nearly three decades.
Our group has collected observations for about 40 AGNs using Argentinian observational facilities, primarily the Jorge Sahade Telescope at CASLEO. This extensive dataset has enabled long-term variability studies of these sources, including detailed analyses of objects such as PKS 2155-304.
We currently continue monitoring these objects, with the aim of characterizing their nature from a multi wavelength perspective.
In addition, I am working on testing and validating a method proposed by Marchesini, E. J., to detect blazars using X-ray and gamma-ray data, with the goal of assessing whether this technique can be used as a reliable tool to identify new blazar candidates in modern surveys.