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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/7910
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dc.contributor.authorAgarwal, Aditi-
dc.contributor.authorMihov, B.-
dc.contributor.authorAndruchow, I.-
dc.contributor.authorCellone, Sergio A.-
dc.contributor.authorAnupama, G.C.-
dc.contributor.authorAgrawal, V.-
dc.contributor.authorZola, S.-
dc.contributor.authorÖzdönmez, Aykut-
dc.contributor.authorEge, Ergün-
dc.date.accessioned2022-03-25T11:10:55Z-
dc.date.available2022-03-25T11:10:55Z-
dc.date.issued2022-02-15-
dc.identifier.citationJournal of Astrophysics and Astronomy, 2022, Vol. 43, Article No. - 9en_US
dc.identifier.issn0250-6335-
dc.identifier.issn0973-7758 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/7910-
dc.descriptionOpen Access from Indian Academy of Sciencesen_US
dc.description.abstractWe study flux and spectral variability of the high energy peaked TeV blazar PG 1553 + 113 on diverse timescales using the data collected from 2005 to 2019 which also includes the intensive intra-night monitoring of the target. Additionally, we recorded the brightest flare of the blazar PG 1553 + 113 during April 2019 when the source attained an R-band magnitude of 13.2. Analyzing the spectral evolution of the source during the flare gave a clockwise spectral hysteresis loop and a time lag with V-band variations leading to the R-band ones. Various statistical tests, fitting procedures and cross-correlation techniques are applied to search for periodicity and examine the color-magnitude relationship. We find a median period of (2.21 ± 0.04) years along with the secondary period of about 210 days. Finally, we briefly discuss various physical mechanisms which are capable of explaining our findings.en_US
dc.language.isoenen_US
dc.publisherSpringer for Indian Academy of Sciencesen_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2022JApA...43....9A/abstracten_US
dc.relation.urihttps://doi.org/10.1007/s12036-021-09793-5en_US
dc.rights2022 Indian Academy of Sciencesen_US
dc.subjectActive galaxiesen_US
dc.subjectBL Lacertae objectsen_US
dc.titleOptical flux and spectral characterization of the blazar PG 1553 + 113 based on the past 15 years of dataen_US
dc.typeArticleen_US
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