Astronomy & Astrophysics

Table 1: Observing log and radial velocities. The spectra numbers 1-19 are used for the first Doppler image, the spectra No. 20-40 for the second Doppler image.
Table 2: Astrophysical data for HD 31993.
Table 3: Longitudes and latitudes of surface features in degrees. The identifications (ID) follow Figs. 4 and 5. Capital letters refer to cool spots, lower-case letters to warm spots. Features b and c are not considered real (see text).