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.