Multi-band optical variability of a newly discovered twelve blazars sample from 2013-2019
Abstract
Here we present the first optical photometric monitoring results of a sample of twelve newly discovered blazars from the ICRF - Gaia CRF astrometric link. The observations were performed from April 2013 until August 2019 using eight telescopes located in Europe. For a robust test for the brightness and colour variability, we use Abbe criterion and F-test. Moreover, linear fittings are performed to investigate the relation in the colour-magnitude variations of the blazars. Variability was confirmed in the case of 10 sources; two sources, 1429+249 and 1556+335 seem to be possibly variable. Three sources (1034+574, 1722+119, and 1741+597) have displayed large amplitude brightness change of more than one magnitude. We found that the seven sources displayed bluer-when-brighter variations, and one source showed redder-when-brighter variations. We briefly explain the various AGN emission models which can explain our results.
Keywords
Cite
@article{arxiv.2304.03664,
title = {Multi-band optical variability of a newly discovered twelve blazars sample from 2013-2019},
author = {Miljana D. Jovanovic and Goran Damljanovic and Francois Taris and Alok C. Gupta and Gopal Bhatta},
journal= {arXiv preprint arXiv:2304.03664},
year = {2023}
}
Comments
14 pages, 8 figures, 11 tables, 6 supplement figures can be provided on request, MNRAS in press