Abstract
The long-term variabilities of PKS 0735+178 in UBV bands have been shown and discussed by means of the methods of period analysis and correlation analysis. The results show that there is a strong variation period of 14.42years in B band, the variations in optical UBV bands are closely correlated with no delay, and the spectral shape is associated with the brightness of the source.
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Fan, J., Lin, R. & Xie, G. The Optical Properties of Variations for Bl Lac Object PKS 0735+178. Astrophysics and Space Science 249, 269–277 (1997). https://doi.org/10.1023/A:1000421615879
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DOI: https://doi.org/10.1023/A:1000421615879