Fig. 10
Double-logarithmic period-amplitude diagram for program Cepheids using the original OGLE-III periods and peak-to-peak amplitudes. Constant objects are shown as open circles, variable objects as filled circles. Left panel: changing periods. The color corresponds to column TP of Tables 1 and 2, from cyan (0%) to magenta (100%). Right panel: variable amplitudes. The color corresponds to column 
of Tables 1 and 2, from cyan (0%) to magenta (100%).
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