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Дата индексирования: Sat Sep 11 20:40:02 2010
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Accuracy of data, comparison with independent measurements

To get an estimate of the external accuracy of IPCS redshifts we compared our results for common galaxies with the redshifts from CfA catalog (Huchra et al. [1995]). For 18 galaxies in common we have mean difference $\langle\Delta v_0\rangle$ = -27 km s^-1 with the error 16 km s^-1 and the standard deviation $\sigma(\Delta v_0)$ = 64 km s^-1. This comparison indicates that most of IPCS redshifts have uncertainty less than 100 km s^-1.