2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/112015We present the results of the UBVRcIc surface brightness profiles decomposition of the Seyfert galaxies III Zw 2, Mrk 506 and Mrk 509. The profiles were modelled as a sum of a Gaussian, a Sersic law and an exponent. A Ferrers bar and a Gaussian ring were added to the model profiles of III Zw 2 and Mrk 506, respectively. The parameters and the total magnitudes of the structural components were derived.a poster presented at the 5th Bulgarian-Serbian Conference "Astronomy and Space Science"Astrophysicstext