...$B = 2.4\times10^{13}$ G

The other object with a measure of the period derivative is RBS 1223, with $\dot{P} = 1.12 \times 10^{-13}~ \rm s s^{-1}$, which implies $B = 3.4\times10^{13}$ G (Kaplan & van Kerkwijk 2005b).

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... models

Tabular models are available upon request to the authors.

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