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Table 5

NIR-to-optical amplitude ratios.

MW+ LMC SMC

Period AJ/AV AH/AV AKs/AV AJ/AV AH/AV AKs/AV

P 20 daysa 0.43 ± 0.01b 0.34 ± 0.01b 0.33 ± 0.01b 0.33 ± 0.01 b 0.26 ± 0.01b 0.25 ± 0.01b
P > 20 daysa 0.45 ± 0.01b 0.40 ± 0.01b 0.41 ± 0.01b 0.39 ± 0.03b 0.39 ± 0.03b 0.37 ± 0.02b

Notes.

(a)

Note that for the AKs/AV ratio of SMC Cepheids the adopted period ranges are P ≤ 15.5 days and P> 15.5 days.

(b)

These errors were estimated as , where N is the number of calibrators in the specific period range.

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