A statistical study of pulsating stars.Seventh paper: The variables in M 2

The cluster M 2 contains several Cepheid variables. The dis- tribution of the values A (2) is peculiar. With the cluster type variable near- ly ali points are on the level a 2. With the Cepheid variables kin this clus­ ter the values A (2) seem to be considerably larger than with the Cepheids in other clusters.

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  • Communications, Series A1:Mathematics and Statistics