Fig. 5.
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Calibration of the RGB tip as a function of colour. Upper panel: Absolute magnitude of the RGB tip in ACS-WFC F814W band as a function of F606W-F814W colour. The dashed line is the linear calibration by Rizzi et al. (2007). Lower panel: Absolute magnitude of the RGB tip in PS1 y band as a functon of PS1 g − i colour. The meaning of the symbols and arrangement is the same as in Fig. 4.
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