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Table 2
Indices used to derive the spectral type for G,K,M-type stars.
| Name | T0 (10 K) | I 0 | b (10 K) | Range (Teff/103 K, Spec. Type) | Index (I) |
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| TiO 6185 | 3.40 | 1.58 ± 0.03 | −0.94 ± 0.11 | 3−3.9, M5−M0 | F6165−6210/F6100−6150 |
| TiO 7140 | 3.40 | 1.99 ± 0.02 | −0.40 ± 0.03 | 3−3.7, M5−M2 | F7125−7155/F7020−7050 |
| MgI | 5.35 | 0.84 ± 0.02 | 5.50 ± 0.28 | 4.8−6, K2-G0 | (2 × F5160−5180)/(F5005−5025 + F5225−5245) |
| CaI | 3.22 | 1.43 ± 0.01 | −1.18 ± 0.05 | 3−3.6, M5−M3 | (F6000−6200 + F6300−6320)/(2 × F6155−6175) |
| CaI | 4.10 | 1.16 ± 0.03 | −8.74 ± 0.80 | 3.6−5.1, M3-K1 | (F6000−6200 + F6300−6320)/(2 × F6155−6175) |
Notes. Indices used for spectral typing of G, K, and early-M star (Sicilia-Aguilar et al. 2004).
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