... planets

Based on observations collected at La Silla Observatory, ESO, Chile, with the HARPS spectrograph, at the 3.6-m ESO telescope (programs 073.D-0578 and 072.C-0488).

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... calibration

The nightly average of the HARPS radial velocities will be available in electronic form at CDS.

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...(McArthur et al. 2004)

A companion to the M-dwarf GJ 436 with a minimum mass $m_2~\sin i=$ 21  $M_{\oplus}$was also announced by Butler et al. (2004) after the submission of the current letter.

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