Line profile fitting for the spectrum of galaxy 30555, obtained with the vpfit code. The solid line represents the spectrum, which has been smoothed with a box function of 3 pixels wide for illustrative purposes. The dotted line is the fit from vpfit. The horizontal axis is the velocity, where a velocity of 0 is the centre of the rest-frame feature calculated with vpfit, and the vertical axis is the flux plus a constant. The absorption at ~500 km s^-1 in the Si ii λ1304 Å line is due to absorption of O iλ1302 Å.