Signal of ionized calcium from the individual data sets and from an average of the data sets, weighted according to the S/N of the data set. The signals have been scaled to be in units of the standard deviation of the noise. The left column is not binned while the right column is binned every 0.05 Å or 3.8 km s^-1. The vertical dotted line in all panels indicates a planet rest frame velocity of 0 km s^-1. The binned average signal has a detection S/N = 4.1; however, this completely originates from the HARPS A data set which individually has a binned detection S/N of 4.9.