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Table 1
Coefficients b0,...,b5 of the colour–Teff relations.
| Colour | Colour range |  |
N | b0 | b1 | b2 | b3 | b4 | b5 |
|---|---|---|---|---|---|---|---|---|---|
| (mag) | (K) | ||||||||
| Dwarf stars | |||||||||
 |
[0.39–1.50] | 61 | 436 | 0.4929 | 0.5092 | –0.0353 | 0.0192 | –0.0020 | –0.0395 |
 |
[0.13–0.69] | 58 | 418 | 0.5316 | 1.2452 | –0.4677 | 0.0068 | –0.0031 | –0.0752 |
 |
[0.25–0.81] | 62 | 439 | 0.5050 | 0.6532 | 0.2284 | 0.0260 | –0.0011 | –0.0726 |
 |
[0.62–3.21] | 44 | 439 | 0.5342 | 0.2044 | –0.0021 | 0.0276 | 0.0005 | –0.0158 |
 |
[0.34–1.74] | 53 | 435 | 0.5526 | 0.3712 | –0.0121 | 0.0330 | 0.0029 | –0.0220 |
 |
[0.53–2.54] | 48 | 443 | 0.5351 | 0.2440 | 0.0016 | 0.0289 | 0.0015 | –0.0163 |
| Giant stars | |||||||||
 |
[0.33–1.81] | 83 | 209 | 0.5323 | 0.4775 | –0.0344 | –0.0110 | –0.0020 | –0.0009 |
 |
[0.11–0.89] | 83 | 208 | 0.5701 | 1.1188 | –0.3710 | –0.0236 | –0.0039 | 0.0070 |
 |
[0.22–0.92] | 71 | 201 | 0.5472 | 0.5914 | 0.2347 | –0.0119 | –0.0012 | 0.0060 |
 |
[0.68–3.97] | 49 | 211 | 0.5668 | 0.1890 | –0.0017 | 0.0065 | –0.0008 | –0.0045 |
 |
[0.35–2.23] | 61 | 215 | 0.5774 | 0.3637 | –0.0226 | 0.0346 | 0.0007 | –0.0221 |
 |
[0.57–3.10] | 46 | 206 | 0.5569 | 0.2436 | –0.0035 | 0.0211 | 0.0007 | –0.0089 |
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