SED fitting of the central star using BT-Settl-CIFIST models. Upper panel: the filled squares with errorbar are the measured photometric data and the open squares are the modelled photometric data. The black line is the optimised model spectrum and the grey lines are 30 spectra randomly drawn from the posterior distributions. Lower panel: posteriors distributions of SED fitting. b_GALEX and b_SDSS are the inflation factors of the GALEX and SDSS photometric data.