Astrophysics
[Submitted on 4 Jan 2000]
Title:The variability analysis of PKS 2155-304
View PDFAbstract: In this paper, the post-1977 photometric observations of PKS 2155-304 are compiled and used to discuss the variation periodicity. Largest amplitude variations ($\Delta U = 1^{m}.5$; $\Delta B = 1^{m}.65$;
$\Delta V = 1^{m}.85 $; $\Delta R = 1^{m}.25$; $\Delta I = 1^{m}.14 $) and color indices ($(B-V) = 0.30\pm 0.06$; $(U-B) = -0.72\pm 0.08$;
$(B-R) = 0.62\pm 0.07$; $(V-R) = 0.32\pm 0.04$) are found.
The Jurkevich's method and DCF (Discrete Correlation Function) method indicate possible periods of 4.16-year and 7.0-year in the V light curve.
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