... jets

All appendices are only available in electronic form at http://www.edpsciences.org

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...1,2,

Present address: Max Planck Institute for Astrophysics, Box 1317, 85741 Garching, Germany.

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... are

Apparently, Eqs. (5)-(8) have some differences with their equivalent forms in a globally flat spacetime. The h appearing in Eqs. (7) and (8) results from formulating the laws of differentiation on a "per-unit-t-base'' while the vectors $\vec{E}$ and $\vec{B}$ are defined on a "per-unit-FIDO-time'' (Thorne et al. 1986).

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... parameter

$\mu$corresponds to the parameter m used by Daigne & Drenkhahn (2002).

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