Multi-band optical variability of a newly discovered twelve blazars sample from 2013-2019 - Archive ouverte HAL
Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2023

Multi-band optical variability of a newly discovered twelve blazars sample from 2013-2019

Miljana D Jovanovic
  • Fonction : Auteur
Goran Damljanovic
  • Fonction : Auteur
Alok C Gupta
  • Fonction : Auteur
Gopal Bhatta
  • Fonction : Auteur

Résumé

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.
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Dates et versions

hal-04084030 , version 1 (22-04-2024)

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Miljana D Jovanovic, Goran Damljanovic, Francois Taris, Alok C Gupta, Gopal Bhatta. Multi-band optical variability of a newly discovered twelve blazars sample from 2013-2019. Monthly Notices of the Royal Astronomical Society, 2023, 522 (1), pp.767-791. ⟨10.1093/mnras/stad904⟩. ⟨hal-04084030⟩
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