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Table 7

Coefficients of the colour–colour polynomial fittings using 2MASS passbands.

Pure-H (with T eff > 5000 K)
Colour Zero point J − H (J − H)2 (J − H)3 σ
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
Colour Zero point H − KS (H − KS)2 (H − KS)3 σ
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
Pure-He (All T eff )
Colour Zero point J − H (J − H)2 (J − H)3 σ
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
Colour Zero point H − KS (H − KS)2 (H − KS)3 σ
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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