bri25 (or amp25 ) is the apparent brightness : B + 5logD +3.63 + as . where B is the apparent magnitude in the B-band, logD is the logd25 diameter and . as is the inclination correction in magnitude per squared arcsec and is calculated as given below: . ... k is the bulge to disk ratio and depends on morphological type as follows: k=0.754*10 (-0.2*t) , if k >1 then k=1 (Simien and de Vaucouleurs) . K is the coefficient dlogD/db (where D is the isophotal diameter at surface brightness b ). ...