Dynamic spectra showing the Hα line of V530 Per, color coded according to the normalized flux. Rotational phases are computed according to Eq. (1). Upper and lower panels: 29 Nov. and 05 Dec., respectively. From left to right: we display the observations, the outcome of the tomographic model, and the residuals. Hα mapping from the first night leads to a reduced χ² of 7.2, while the second night provides us with a reduced χ² of 7.6.