Our RV measurements of vB10 (crosses) vs. the measurements of ZO09 (open circles). The RV precision given by our analysis is about    220 m s^-1, except for the last epoch in 2008, which was hampered by bad weather. We prove that the RV shift in the work of ZO09 in the first 2001 epoch (BJD  = 2   452   076) originates from unaccounted asymmetries in the IP and not from a planetary companion.