Astronomy & Astrophysics

Table 1: Observed and derived data for NGC 2264 candidates discussed Sect. 4.1 (the first eight) and Sect. 4.2 (last two listed). Columns 7-9 give respectively the $A_{\rm v}$ derived from near-infrared colours, and the dereddened I and J-magnitudes. Uncertainties in JHK are taken to be $\pm$ 0.1 mag and $\pm$ 0.3 mag for flags A and C respectively, yielding errors in $A_{\rm v}\pm 1$ mag for flag A, $\pm$ 3 mag for flag C. These errors are carried through to the dereddened magnitudes (see text for details).