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Table 7
Coefficients of the colour–colour polynomial fittings using 2MASS passbands.
| Pure-H (with T eff > 5000 K) | |||||
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| Colour | Zero point | J − H | (J − H)2 | (J − H)3 | σ |
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| G − G BP | –0.0034 | –1.1932 | 2.1269 | –8.0313 | 0.028 |
| G − G RP | 0.0065 | 2.2502 | –3.2057 | 6.3488 | 0.029 |
| G − G RVS | 0.0356 | 3.0105 | –4.1872 | 8.1704 | 0.037 |
| GBP – GRP | 0.0099 | 3.4434 | –5.3326 | 14.3800 | 0.056 |
| G − J | –0.1012 | 4.6781 | –5.8656 | 12.5043 | 0.062 |
| G − H | –0.1012 | 5.6781 | –5.8656 | 12.5043 | 0.062 |
| G − KS | –0.1471 | 6.0017 | –6.5462 | 15.6901 | 0.068 |
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| Colour | Zero point | H − KS | (H − KS)2 | (H − KS)3 | σ |
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| G − G BP | –0.1554 | –3.3439 | 1.7800 | 17.6435 | 0.032 |
| G − G RP | 0.2713 | 5.4984 | –12.2013 | –88.7226 | 0.050 |
| G − G RVS | 0.3897 | 7.3579 | –16.1908 | –120.0339 | 0.069 |
| GBP – GRP | 0.4267 | 8.8424 | –13.9813 | –106.3661 | 0.080 |
| G − J | 0.4739 | 11.9522 | –25.0546 | –216.7318 | 0.090 |
| G − H | 0.6107 | 14.8963 | –28.7366 | –293.7142 | 0.110 |
| G − KS | 0.6107 | 15.8963 | –28.7366 | –293.7142 | 0.110 |
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| Pure-He (All T eff ) | |||||
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| Colour | Zero point | J − H | (J − H)2 | (J − H)3 | σ |
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| G − G BP | –0.0161 | –1.5484 | –1.7352 | 1.0170 | 0.039 |
| G − G RP | 0.0854 | 2.6145 | –1.1648 | –0.3721 | 0.027 |
| G − G RVS | 0.1256 | 3.4444 | –1.1064 | –0.6378 | 0.037 |
| GBP – GRP | 0.1015 | 4.1628 | 0.5704 | –1.3891 | 0.065 |
| G − J | –0.0079 | 5.1327 | –0.1668 | –1.4542 | 0.049 |
| G − H | –0.0079 | 6.1327 | –0.1668 | –1.4542 | 0.049 |
| G − KS | –0.0304 | 6.7716 | 0.1327 | –1.9867 | 0.047 |
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| Colour | Zero point | H − KS | (H − KS)2 | (H − KS)3 | σ |
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| G − G BP | –0.0661 | –2.5496 | –3.4271 | 3.7898 | 0.046 |
| G − G RP | 0.1692 | 3.9294 | –4.1881 | 2.2276 | 0.036 |
| G − G RVS | 0.2360 | 5.2135 | –4.4738 | 2.0733 | 0.049 |
| GBP – GRP | 0.2354 | 6.4790 | –0.7610 | –1.5622 | 0.080 |
| G − J | 0.1599 | 7.8890 | –3.5933 | 2.1854 | 0.066 |
| G − H | 0.1933 | 9.4216 | –4.3087 | 4.3196 | 0.070 |
| G − KS | 0.1933 | 10.4216 | –4.3087 | 4.3196 | 0.070 |
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