SED plots, as well as the best template fits, shown for all the spatially associated optical sources for 73 of the 75 X‐ray sources. Solid lines: Best‐fitted template SED; squares: BATC PSF photometry SED; crosses: aperture photometry result for the filters is too faint to perform accurate photometry; error bars: photometry errors (see Zhou et al. 2003 for detail). Note that we do not use data that have great uncertainty in the SOCA classification. The best‐fitted χ² is also listed in for each SED.