Table 2: I-band magnitude, H$\alpha $ emission, pseudocontinuum indices and spectral types from the NOT data.
Name Ia pEW (H$\alpha $) PC1 PC2 PC3 PC4 Spectral type
  (mag) (Å)          
S Ori J053825.4-024241 16.86 $\pm$ 0.06 -230 $\pm$ 70 1.2 $\pm$ 0.6 1.85 $\pm$ 0.17 1.36 $\pm$ 0.13 1.7 $\pm$ 0.3 M6.0 $\pm$ 1.0
S Ori J053954.3-023719 17.03 $\pm$ 0.04 -5 $\pm$ 1 1.8 $\pm$ 0.2 2.0 $\pm$ 0.2 1.34 $\pm$ 0.18 1.64 $\pm$ 0.12 M6.0 $\pm$ 1.0
S Ori J053838.6-024157 16.52 $\pm$ 0.07 -6 $\pm$ 1 1.39 $\pm$ 0.14 1.75 $\pm$ 0.18 1.3 $\pm$ 0.3 1.6 $\pm$ 0.2 M5.5 $\pm$ 1.0
S Ori J053826.1-024041 16.87 $\pm$ 0.06 [-2,+2]b 1.4 $\pm$ 0.4 2.2 $\pm$ 0.5 1.19 $\pm$ 0.18 1.5 $\pm$ 0.3 M5.0 $\pm$ 2.0c
a From Béjar et al. (2004).
b pEW(H $\alpha) = -4 \pm 2$ Å (from Barrado y Navascués et al. 2003).
c M6.0 spectral type matches better to the spectroscopic cluster sequence. It is an M8-type binary
dwarf according to Barrado y Navascués et al. (2003).

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