Temporal relation between coronal rain and sunspot supersonic downflows. (a) An AIA 304 Å image showing the coronal rain falling into region A. The black contours outline the boundaries of the umbra and penumbra. (b) Space-time diagram of AIA 304 Å intensity along the trajectory S0 shown in panel a. The dark dotted line represents a parabolic fit to the track of one coronal rain flow occurring from 00:50 to 01:20 UT. (c) Spectral detector images of the C II 1335 Å Si IV 1403 Å and Mg II k 2796 Å lines along the slit (red vertical line) shown in panel a. The white arrows mark the SSDs caused by the falling coronal rain along trajectory S0. An animation of this figure is available online.