Table 1: RVs for BDs and VLMSs (M6-M8) in Cha I. Given are the date of the observation, heliocentric Julian day (HJD) at the middle of the exposure, the measured RV and the estimated error $\sigma _{{\it RV}}$ of the relative RVs. The asterisk marks RVs based on the average of two single measurements for which the errors are standard deviations. The last column gives the weighted mean RV for the individual objects and the error of this mean, which takes into account an uncertainty of 400 m s-1 for the zero point of the velocity.
Object Date HJD RV  $\sigma _{{\it RV}}$ $\overline{{\it RV}}$
      [km s-1] [km s-1] [km s-1]
Cha H$\alpha $ 1 2000 Apr. 04 2 451 638.56395 16.167  0.53  
  2000 Apr. 24 2 451 658.57346 16.648  0.67 16.35 $\pm$ 0.63
Cha H$\alpha $ 2 2000 Apr. 04 2 451 638.59431 16.015  0.50  
  2000 Apr. 24 2 451 658.60407 16.282  0.56 16.13 $\pm$ 0.53
Cha H$\alpha $ 3 2000 Apr. 04 2 451 639.49340 14.357  0.45  
  2000 Apr. 24 2 451 658.61991 14.758  0.45 14.56 $\pm$ 0.60
Cha H$\alpha $ 4 2000 Mar. 14 2 451 617.73646 14.909  0.38 *  
  2000 Mar. 24 2 451 627.80388 14.866  0.19 *  
  2000 Mar. 31 2 451 635.51085 14.773  0.14  
  2000 Apr. 23 2 451 658.52150 14.908  0.05 *  
  2000 May 22 2 451 687.50595 14.830  0.08 * 14.82 $\pm$ 0.40
  2002 Jan. 17 2 452 291.78912 14.949  0.48 *  
  2002 Jan. 18 2 452 292.82508 14.754  0.12 *  
  2002 Jan. 24 2 452 298.70540 14.635  0.08 *  
  2002 Feb. 02 2 452 307.71979 15.064  0.39 *  
  2002 Feb. 04 2 452 309.74222 14.821  0.001 *  
  2002 Feb. 13 2 452 318.71915 14.985  0.07 *  
Cha H$\alpha $ 5 2000 Apr. 05 2 451 639.51485 15.499  0.45  
  2000 Apr. 24 2 451 658.63522 15.446  0.42 15.47 $\pm$ 0.43
Cha H$\alpha $ 6 2000 Apr. 05 2 451 639.58967 16.093  0.50  
  2000 Apr. 24 2 451 658.65099 16.652  0.50 16.37 $\pm$ 0.68
Cha H$\alpha $ 7 2000 Apr. 05 2 451 639.55225 16.513  0.56  
  2000 Apr. 24 2 451 658.68756 17.664  0.56 17.09 $\pm$ 0.98
Cha H$\alpha $ 8 2000 Apr. 05 2 451 639.61095 14.787  0.50  
  2000 Apr. 24 2 451 658.72597 14.935  0.50 14.86 $\pm$ 0.47 (2000)
  2002 Mar. 06 2 452 339.68965 16.920  0.07 *  
  2002 Mar. 22 2 452 355.65264 16.912  0.16 *  
  2002 Apr. 16 2 452 380.61646 17.551  0.23 *  
  2002 Apr. 19 2 452 383.57565 17.379  0.03 * 17.30 $\pm$ 0.50 (2002)
Cha H$\alpha $ 12 2000 Apr. 05 2 451 639.63487 15.021  0.50  
  2000 Apr. 25 2 451 659.59469 13.905  0.53 14.50 $\pm$ 0.96


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