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000598714 005__ 20240112093150.0
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000598714 0247_ $$2arXiv$$aarXiv:2301.01944
000598714 0247_ $$2datacite_doi$$a10.3204/PUBDB-2023-06969
000598714 037__ $$aPUBDB-2023-06969
000598714 041__ $$aEnglish
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000598714 088__ $$2arXiv$$aarXiv:2301.01944
000598714 1001_ $$0P:(DE-HGF)0$$aRoy, Abhradeep$$b0$$eCorresponding author
000598714 245__ $$aStudy of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164
000598714 260__ $$c2023
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000598714 500__ $$a27 pages, 10 figures. Accepted for publication in The Astrophysical Journal Supplement Series (ApJS)
000598714 520__ $$aWe present a long-term and intraday variability study of optical multiwaveband (U BV RI) data from the blazar AO 0235+164 collected by various telescopes for ∼44 yr (1975–2019). The blazar was found to be significantly variable over the years in all wave bands with a variation of about 6 mag between its low and active states. The variations in the different wave bands are highly correlated without any time lag. We did not observe any significant trend in color variation with time, but we observed a bluer-when-brighter trend between the B − I color index and the R magnitude. Optical BV R-band spectral energy distributions always show a convex shape. Significant intraday variability was frequently seen in the quasi-simultaneous observations of AO 0235+164 made on 22 nights in the R and V bands by the CASLEO and CAHA telescopes during 1999–2019. We also estimated a central supermassive black hole mass of 7.9 × 10$^{7}$ M $_{⊙}$ by analyzing the broad Mg ii emission line in AO 0235+164's spectrum. We briefly explore the probable physical scenarios responsible for the observed variability.
000598714 536__ $$0G:(DE-HGF)POF4-613$$a613 - Matter and Radiation from the Universe (POF4-613)$$cPOF4-613$$fPOF IV$$x0
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000598714 693__ $$0EXP:(DE-H253)VERITAS-20170101$$5EXP:(DE-H253)VERITAS-20170101$$eVery Energetic Radiation Imaging Telescope Array System$$x0
000598714 7001_ $$00000-0002-9331-4388$$aGupta, Alok C.$$b1
000598714 7001_ $$00000-0001-5046-7504$$aChitnis, Varsha R.$$b2
000598714 7001_ $$00000-0002-3866-2726$$aCellone, Sergio A.$$b3
000598714 7001_ $$00000-0003-1784-2784$$aRaiteri, Claudia M.$$b4
000598714 7001_ $$00000-0002-5260-1807$$aRomero, Gustavo E.$$b5
000598714 7001_ $$00000-0002-1029-3746$$aWiita, Paul J.$$b6
000598714 7001_ $$00000-0003-0881-9275$$aChatterjee, Anshu$$b7
000598714 7001_ $$00000-0002-2565-5025$$aCombi, Jorge A.$$b8
000598714 7001_ $$00000-0002-9137-7019$$aLiao, Mai$$b9
000598714 7001_ $$0P:(DE-H253)PIP1101390$$aSarkar, Arkadipta$$b10
000598714 7001_ $$0P:(DE-HGF)0$$aVillata, Massimo$$b11
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000598714 9141_ $$y2023
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