Radial velocity measurements for α Tau from the seven data sets: CFHT (diamonds), DAO (inverted triangles), McD-2.1 m (circles), McD-CS11 (squares), McD-Tull (sideways triangles), TLS (triangles), and BOAO (pentagons). Zero point corrections have been applied to the individual data sets before plotting (see text). The curve represents the orbital solution (see Table 10). The vertical dash represents the peak-to-peak variations of the stellar oscillations.