(H–K_s, J–H) color-color diagram of our targets. We also display the intrinsic color tracks of main-sequence (MS; dash-dotted line) and giant (dotted line) stars from Bessell & Brett (1988), which we converted into the 2MASS photometric system using the Carpenter (2001) relation. Eight sources lie outside the locus of MS stars: two sources likely suffering from extinction (red circles) and six sources with possibly small extinction or poor-quality infrared magnitudes (orange crosses). We also overplot their error bars, except for source #102 because its J and K_s magnitudes are upper limits in 2MASS. The arrow indicates the reddening vector for A_V = 1 mag. For a better readability, the source #120 with H–K_s = −0.152 ± 0.045 mag does not appear.