Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/6707
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dc.contributor.authorBhattacharya, Debbijoy-
dc.contributor.authorGulati, S-
dc.contributor.authorStalin, C. S-
dc.date.accessioned2020-11-10T02:04:26Z-
dc.date.available2020-11-10T02:04:26Z-
dc.date.issued2019-03-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, Vol. 483, No. 3, pp. 3382 - 3389en_US
dc.identifier.issn1365-2966-
dc.identifier.urihttp://prints.iiap.res.in/handle/2248/6707-
dc.descriptionRestricted Access © Royal Astronomical Society https://doi.org/10.1093/mnras/sty3299en_US
dc.description.abstractThe majority of the γ-ray sources detected by the Fermi Gamma-ray Space Telescope belong to the blazar class of active galactic nuclei (AGNs). In addition to blazars, a minority of non-blazar AGNs is also found to be γ-ray emitters. A class of AGNs with large jet to line-of-sight angle are termed as misaligned AGNs (MAGNs). A significant fraction of γ-ray emitting non-blazar AGNs belong to this class. The detection of these sources in γ-rays suggests that most of their emission originate in the jet. Considering jet origin of intra-night optical variability (INOV), one thus can expect to observe strong presence of INOV in these γ-ray detected MAGN. However, no observations exist on their INOV nature. We therefore, have carried out a first search for INOV on a sample of six MAGN, that comprises three FR I, two Steep Spectrum Radio Quasars (SSRQs)/Compact Steep Spectrum (CSS) and one FR II galaxy. Our observations carried out on a total of eight nights for a duration of ∼29 h, reveal that MAGNs show large amplitude (between 2 and 10 per cent) INOV with a duty cycle of about 50 per cent, including both variable and probably variable sources, which is similar to that shown by blazars. Though INOV has been detected in MAGNs, differences if any between the INOV characteristics of FR I, SSRQs/CSS, and FR II types of MAGNs could not be unambiguously established owing to limited observations. Nevertheless, the first detection of INOV in MAGNs points to their jet based origin.en_US
dc.language.isoenen_US
dc.publisherOxford University Press on behalf of the Royal Astronomical Societyen_US
dc.subjectGalaxies: activeen_US
dc.subjectGalaxies: jetsen_US
dc.subjectGalaxies: photometryen_US
dc.subjectQuasars: generalen_US
dc.titleIntra-night optical variability of misaligned active galaxiesen_US
dc.typeArticleen_US
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