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Fig. 1

image

WVIc (W/M13) and Spitzer (M13) distances for Cepheids in IC 1613 and NGC 6822. Cepheids near the crowded core of IC 1613 appear brighter owing to photometric contamination from neighboring (unresolved) stars. Colors associated with the Cepheids are likewise shown, and the overlaid piecewise fits are provided as a guide. For clarity purposes photometric uncertainties (probably underestimated) are provided for the IC 1613 Spitzer distances only.

This figure is made of several images, please see below:

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