Best-fitted parameters of the spectra from bursts #1−3 using the model TBabs × (bbodyrad + f_a× (diskbb + bbodyrad)). From top to bottom: Bolometric blackbody flux (F_bb), blackbody temperature (kT_bb), blackbody radius (R_bb), and the goodness of fit (χ_ν²). In the bottom panel, the red and black lines indicate the χ_ν² with f_a free and fixed at 1, respectively. Since allowing f_a to vary did not improve the fit, it was fixed at 1.