Bulletin de la Société Royale des Sciences de Liège Bulletin de la Société Royale des Sciences de Liège -  Volume 87 - Année 2018  Actes de colloques  First Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - November 2016 - Nainital, India 

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

Vineet Ojha
Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India, vineet@aries.res.in
Hum Chand
Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India
Krishna Gopal
Centre for Excellence in Basic Sciences (CBS), University of Mumbai campus (Kalina) 400098, India

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

Pour citer cet article

Vineet Ojha, Hum Chand & Krishna Gopal, «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.