SIMBAD references

We present calibrations of the effective temperatures of giant stars versus [Fe/H] and colours (U-V), (B-V), (R-I), (V-R), (V-I), (V-K), (J-H), (J-K), (I-K), (V-L'), (b-y) and (u-b). These calibrations are based on a large sample of field and globular cluster stars which roughly cover spectral types from F0 to K5. Their effective temperatures, scaled to direct T_eff determinations via reliable angular diameter measurements, were derived by applying the infrared flux method. The empirical relations have been fitted to polynomials of the form θ_eff = P(colour,[Fe/H]) by using the least squares method. The precision of the fits ranges from 40K for (V-K) to 170K for (J-H). We tabulate intrinsic colours of giant stars in the ranges: 3500K≤T_eff≤8000K; -3.0≤[Fe/H]≤+0.5. We also present the calibration of BC(V) as a function of log(T_eff) and metallicity. Finally, we compare the resulting scale of temperatures with previous works.