Vol 14, No 8

Optical monitoring of the Seyfert galaxy NGC 4151 and possible periodicities in its historical light curve

Di-Fu Guo, Shao-Ming Hu, Jun Tao, Hong-Xing Yin, Xu Chen, Hong-Jian Pan


Abstract We report B, V and R band CCD photometry of the Seyfert galaxy NGC 4151 obtained with the 1.0 m telescope at Weihai Observatory of Shandong University and the 1.56 m telescope at Shanghai Astronomical Observatory from 2005 December to 2013 February. Combining all available data from literature, we have constructed a historical light curve from 1910 to 2013 to study the periodicity of the source using three different methods (the Jurkevich method, the Lomb-Scargle periodogram method and the Discrete Correlation Function method). We find possible periods of P1 = 4 ± 0.1, P2 = 7.5 ± 0.3 and P3 = 15.9 ± 0.3 yr.


Keywords methods: data analysis — galaxies: active — galaxies: individual (NGC 4151)

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