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Aditi Agarwal

Multi-band optical variability studies of Blazars

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Mots-clés : AGN, astronomie, astrophysique, extragalactique, photométrie, variabilité

Abstract

To search for optical variability on a wide range of timescales, we have carried out photometric monitoring of a dozen blazars. CCD magnitudes in B, V, R and I pass-bands were determined for > 10,000f new optical observations from 300 nights made during 2011 – 2016, with an average length of ~ 4 h each, using seven optical telescopes: four in Bulgaria, one in Greece, and two in India. We measured multiband optical flux and colour variations on diverse timescales. Blazar variability studies helped us in understanding their nature and extreme conditions within the emission region. To explain possible physical causes of the observed spectral variability, we also investigated spectral energy distributions using B, V, R, I, J and K pass-band data.

Keywords : AGN, astronomy, astrophysics, extragalactic, photometry, variability

Pour citer cet article

Aditi Agarwal, «Multi-band optical variability studies of Blazars», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 87 - Année 2018, Actes de colloques, First Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - November 2016 - Nainital, India, 321 - 324 URL : https://popups.uliege.be:443/0037-9565/index.php?id=7758.

A propos de : Aditi Agarwal

Indian Institute of Astrophysics, Bangalore - 560034, India, aditiagaral.phy@gmail.com