Photometric SED of BD-7°5977 with the best fitting model (left panel) and the confidence intervals for the effective temperature and surface gravity of both components (right panels). The observed photometry is plotted in blue crosses, while the synthetic best fit photometry is plotted in black horizontal line. The best fitting binary model is shown with a red line, while the models for the cool companion and sdB star are show respectively with a green and a blue line.