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Table 2

Spectroscopic indices and colour ratios.

Index Feature Value SpT
A CaH λ6975 Å 1.24 M3.0
B/A Ti I λ7358 Å 0.85 M3.5
D/A Ca II λ8542 Å 0.87 M3.5
TiO5 TiO λλ7042–7135 Å 0.48 M3.0
PC3 Pseudo-continuum λλ7569, 8250 Å 1.21 M5.0

Notes. The uncertainty of the indices is 5% or less. All spectral types have been rounded to the nearest half subtype.

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