First row: detection limits for granulation. The left panel shows the detection limit versus the planet period for a 30 min observing duration over 1 night, for different samplings: 1 day (red), 4 days (green), 8 days (orange), 20 day (blue), random sampling of 20 days per year (dashed yellow), random sampling of 40 days per year (dashed black). The middle panel shows the detection limit for the 1 day sampling over one night for different observing durations: 30 min (red), 1 h (green), 2 h (orange). The right panel shows the detection limit for the 8 day sampling over one night for different observing durations (same colors as middle panel) and nights: 1 night (solid lines), 2 nights (dashed lines), 5 nights (dotted lines). In all cases the horizontal dotted-dashed line shows the 1 M_Earth level. Second row: same for supergranulation (at a level 2.5 times the minimum). Third row: same for granulation + supergranulation + mesogranulation. Fourth row: same for magnetic activity. Fifth row: same for the four components.