The median sSFR as a function of M_* for satellites (square symbols connected by solid lines) and field galaxies (circles connected by dotted lines). The two panels include only SF (a) and Q (b) galaxies as defined in Fig. 2. Error bars are bootstrap errors. Satellites have lower sSFR than field galaxies by about 0.1 dex at the same mass and star formation class. In particular, the main sequence is lower for satellites than for field galaxies.