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Table 5:

Effective temperatures at the mid-point of each curvilinear quadrilateral representing a MK spectral type-luminosity class in the BCD ( $\lambda _1, D)$ plane for early type stars.
LC: V IV III II Ib Ia
SpT $\lambda _1$ D $T_{\rm eff}$ $\lambda _1$ D $T_{\rm eff}$ $\lambda _1$ D $T_{\rm eff}$ $\lambda _1$ D $T_{\rm eff}$ $\lambda _1$ D $T_{\rm eff}$ $\lambda _1$ D $T_{\rm eff}$
O6-7 67.0 0.062 34640 59.4 0.060 34800 54.5 0.055 35060 50.2 0.048 33970 45.9 0.040 32590 37.3 0.014 29670
O8-9 66.1 0.075 32750 58.4 0.071 33070 53.1 0.067 32460 47.9 0.061 30690 43.1 0.052 28350 34.7 0.025 26040
B0 65.1 0.094 30000 56.9 0.091 29970 51.2 0.085 29070 45.0 0.077 26710 39.9 0.066 24380 31.9 0.037 23890
B1 63.5 0.121 27080 54.9 0.116 26960 48.4 0.110 24880 41.5 0.099 23370 36.3 0.085 22360 28.8 0.052 22020
B2 61.5 0.160 22620 52.2 0.156 22380 44.9 0.147 21740 37.5 0.127 20570 32.2 0.107 19790 25.0 0.071 19310
B3 59.7 0.203 19270 49.7 0.201 19160 41.6 0.188 18900 33.5 0.160 18010 28.2 0.133 17520 21.6 0.091 17140
B4 58.8 0.235 17220 48.3 0.235 17130 39.6 0.218 17310 31.1 0.184 16500 25.7 0.152 16180 18.9 0.108 15660
B5 57.9 0.269 15380 47.1 0.271 15570 37.8 0.249 15890 29.0 0.211 15080 23.1 0.174 14770 16.6 0.126 14460
B6 57.7 0.302 14100 46.7 0.309 14200 36.3 0.286 14530 27.1 0.241 13790 20.9 0.197 13510 14.6 0.143 13560
B7 58.1 0.333 13000 47.0 0.345 13000 35.3 0.322 13460 25.7 0.273 12600 19.2 0.221 12540 12.8 0.159 12800
B8 59.1 0.363 12190 47.7 0.380 12120 35.0 0.363 12380 24.8 0.306 11790 17.9 0.246 11930 11.2 0.176 12280
B9 61.5 0.406 11340 49.5 0.427 11240 35.8 0.423 11240 23.9 0.362 10800 16.0 0.291 11070 8.9 0.205 11720
A0 64.8 0.448 10470 52.1 0.476 10310 37.3 0.477 10350 23.5 0.431 10140 14.3 0.352 10310 6.3 0.243 11010
A1 67.4 0.476 9860 54.0 0.508 9730 38.4 0.511 9820 23.7 0.478 9680 13.4 0.401 9690 4.3 0.277 10440

LC = Luminosity class; SpT = spectral type; [ $\lambda_1]=\lambda_1-3700$ Å; [D] = dex.


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