Erratum for: A&A, 608, A131 (2017), https://doi.org/10.1051/0004-6361/201731519

The original article contains some errors, which are corrected below.

Introduction. Line of text number 10, shows $\mathrm{\Delta }\dot{\nu }/\dot{\nu }\sim {10}^{-4}-{10}^{-3}$, but it must be “$\mathrm{\Delta }\dot{\nu }/\dot{\nu }\sim {10}^{-5}-{10}^{-2}$”.

Figure 4. The y axis is labeled by “$log{\dot{\nu }}_{\mathrm{g}}$ (Hz s⁻¹)”, but it must be “${\dot{\nu }}_{\mathrm{g}}$ (Hz s⁻¹)”.

Section 4.2. Page number 5, “the 7th bin $(log|\dot{\nu }|=-10.75)$” but it must be “7th bin $(log|\dot{\nu }|=-13.75)$”.

Equation (3) and its description is written as$$\begin{array}{c}\hfill p_i=min\{P(N_{\ell }^{\mathrm{obs}}\le N_{\ell }^{\exp }),P(N_{\ell }^{\mathrm{obs}}\ge N_{\ell }^{\exp })\}\text{,}\end{array}$$(3)

where $P(N_{\ell }^{\text{obs}}\le N_{\ell }^{\text{exp}})$ is the (Poisson) probability of observing a value $N_{\ell }^{\text{obs}}$ smaller or equal to the expected value $N_{\ell }^{\text{exp}}$ , based on the fixed ratio $\dot{N_{\ell }}/|\dot{\nu }|=(4.2\pm 0.5)\times {10}^2{\mathrm{Hz}}^{-1}$ calculated above (and analogously for $P[N_{\ell }^{\text{obs}}\ge N_{\ell }^{\text{exp}}]$).

However, it must be$$\begin{array}{c}\hfill p_i=min\{P(x\le N_{\ell }^{\mathrm{obs}}),P(N_{\ell }^{\mathrm{obs}}\ge x)\}\text{,}\end{array}$$(3)

where $P(x\le N_{\ell }^{\text{obs}})$ is the (Poisson) probability of obtaining a value x smaller or equal to the actual observed value $N_{\ell }^{\text{obs}}$, based on the fixed ratio $\dot{N_{\ell }}/|\dot{\nu }|=(4.2\pm 0.5)\times {10}^2{\mathrm{Hz}}^{-1}$ calculated above, and the observation time of the pulsar (and analogously for $P[N_{\ell }^{\text{obs}}\ge x]$ ).

Discussion. Line of text number 1, shows “$\dot{\nu }<{10}^{-10.5}\mathrm{Hz}{\mathrm{s}}^{-1}$” but it must be “$|\dot{\nu }|<{10}^{-10.5}\mathrm{Hz}{\mathrm{s}}^{-1}$”.

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