Pie diagram of the satellite-origin of the 514 GROND-observed GRBs: the outer circle represents the overall ratio of the missions providing the trigger, the inner circle depicts the ratio of detected (darker colour) vs. non-detected (lighter colours) optical/NIR afterglows. The thin slice above MAXI is the optically identified iPTF14yb transient, which later was related to GRB 140226A based on a Mars/Odyssey, Konus-Wind and INTEGRAL data. The vast majority of GROND-observed are from Swift and thus have XRT-positions and spectra.