3C 66A is one of the most interesting blazars and one of our monitoring objects carried out with the 1.56 m telescope at Sheshan station, Shanghai Astronomical Observatory (ShAO). It has been monitored since 1996 December 11. In the present work, we show its optical light curves during the period of 1996 December 11–2009 December 28. From our observations, we found that the largest variations in the V, R, and I bands are , mag, and ΔI = 1.659 ± 0.047 mag, respectively. Intra-day variabilities are found in the three bands: in the V band, an A = 17.7% brightness increase over minutes on JD 2455119, and an brightness increase over minutes on JD 2454816; in the R band, an brightness increase over minutes on JD 2454004, and an brightness increase over minutes on JD 2453995; and in the I band, an brightness decrease over ΔT = 38.44 minutes on JD 2453995, and an brightness decrease over ΔT = 344.02 minutes on JD 2454818. For micro-variability, we found that R variability leads I variability by 25.92 ± 1.09 minutes. When the periodicity analysis methods, with the red noise being considered, are adopted to the V, R, and I observations, we can find that the periodogram to the V data is consistent with red noise, except for 1 CLEANest peak corresponding to the timescale of 696.0 ± 182.0 days, those to the R data are 653.0 ± 171.0 and 156.0 ± 17.0 days; and those to the I data are 801.0 ± 207.0 and 156.0 ± 15.0 days, respectively.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.