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This article is an erratum for:

Volume 588, April 2016
Article Number C2
Number of page(s) 1
Section Galactic structure, stellar clusters and populations
Published online 25 March 2016

The paper “Estimating the parameters of globular cluster M 30 (NGC 7099) from time-series photometry”, used an incorrect expression for the phase φ(t) at time t of a periodic variable undergoing a linear period change. Equation (3) of that paper should be: (1)where NE(t) is the number of cycles elapsed at time t since a reference epoch E. For a constant rate of period change β, NE(t) is given by (Kains et al. 2015): (2)where P0 is the period at the epoch E. Using this correct expression, we are still unable to phase the light curve of RR Lyrae star V16 satisfactorily, and our conclusions therefore remain unaffected.


  1. Kains, N., Arellano Ferro, A., Figuera Jaimes, R., et al. 2015, A&A, 578, A128 [NASA ADS] [CrossRef] [EDP Sciences] [Google Scholar]

© ESO, 2016

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