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Fig. 1

image

Period distribution for the calibrating Cepheids in our sample for the three different bands J (top), H (middle), and KS (bottom). The color coding indicates different data sets (red: MP sample; blue: LS sample; green: SMC sample; orange: P04 sample). The total number of calibrating Cepheids per data set are also labeled. See text for more details.

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