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Vineet Ojha, Hum Chand & Gopal-Krishna

Intra-night optical variability properties of X-ray bright Narrow-line Seyfert 1 galaxies

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

Abstract

We present Intra Night Optical Variability (INOV) study of the 9 Narrow-line Seyfert 1 (NLSy 1) galaxies which are detected in X-ray at more than 3σ level. Our observations cover a total of 9 nights (~ 36 hr) with each NLSy 1 monitored for ≥ 3.5 hr in each night. After applying F-test to assess variability status of these sources, we found none of these sources to be variable. Such non-variability nature of X-ray detected NLSy 1 galaxies suggests the lack of jet dominance as far as X-ray emission is concerned. Higher photometric accuracy for these faint sources, achievable with the newly installed ARIES 3.6m DOT will be helpful.

Keywords : AGN, astronomy, astrophysics, extragalactic, variability

To cite this article

Vineet Ojha, Hum Chand & Gopal-Krishna, «Intra-night optical variability properties of X-ray bright Narrow-line Seyfert 1 galaxies», 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, 387 - 390 URL : https://popups.uliege.be/0037-9565/index.php?id=7798.

About: Vineet Ojha

Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India, vineet@aries.res.in

About: Hum Chand

Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India

About:  Gopal-Krishna

Centre for Excellence in Basic Sciences (CBS), University of Mumbai campus (Kalina) 400098, India