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Author Stalin, C. S. ♦ Gupta, A. C. ♦ Krishna, Gopal ♦ Wiita, P. J. ♦ Sagar, R.
Source Aryabhatta Research Institute of Observational Sciences (ARIES)
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword Galaxies ♦ Active- BL Lacertae ♦ Photometry-Quasars
Abstract We report monitoring observations of 20 high- luminosity active galactic nuclei (AGN), 12 of which are radio-quiet quasars (RQQs). Intranight optical variability (INOV) was detected for 13 of the 20 objects, including 5RQQs. The variations are distinctly stronger and more frequent for blazers than for the other AGN classes. By combining these data with results obtained earlier in our programme, we have formed an enlarged sample consisting of 9 BL Lacs, 19 RQQs and 11 lobe-dominated radio-loud quasars (LDQs) argues against a direct link between INOV and radio loudness. We supplemented the present observations of 3 BL Lacs with additional data from the literature. In this extended sample of 12 well observed BL Lacs, stronger INOV in found for the EGRET detected subset.
Part of series mn356-607
Educational Use Research
Education Level UG and PG
Learning Resource Type Article