Table 1

Keck/HIRES observing log.

Star V Observing date (UT) E×p. time [s] Total exp. time [s] S / N

HD 19445 8.06 2005/10/22 3 × 500 1500 740
HD 84937 8.32 2006/01/19 2 × 400 + 3 × 500 + 4 × 600 4700 1030
HD 140283 7.21 2005/06/16 2 × 300 600 990
G64-12 11.45 2005/06/16-17 18 × 1200 21 600 820

Notes.The S/N value has been estimated in the region around the Li 6707 Å line.

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