A comparison of the deconvolved profiles (Mrk 335) with the observed ones. The profiles are shifted vertically by a constant value (﹩{10}^{-14}\;\mathrm{erg}\;{{\rm{s}}}^{-1}\;{\mathrm{cm}}^{-2}\;{\mathring{\rm A} }^{-1}﹩) from bottom to top for clarity. The broadening caused by instruments and varying seeing is corrected successfully. The miscentering effect (see Section 3) is also eliminated effectively. The dashed lines mark the center of Hβ λ4861. The wavelength is in the rest frame and JD − 2456000 is marked next to each profile.