Maps of the Balmer emission in IC 1553. Left: map of the Balmer decrement Hα/Hβ obtained from the spectral template fitting with pPXF. Middle: map of the extinction-corrected Hα emission line flux in Rayleighs with linear scaling. Right: the same as the middle panel, but with logarithmic scaling. The contours are arbitrary equidistant levels from the synthetic V-band image meant to give orientation for the eye. The white square in the lower left corner corresponds to the masked background galaxy. The red circles in the middle panel mark the H II regions used for the oxygen abundance measurement listed in Table 1. The boxed region marked A in the right-hand panel is identical to the gray shaded area in Fig. 5 below.