Thumbnails for the 24 GRBs observed with GROND. The orange circles represent the Swift/XRT 90% error circles as taken from www.swift.ac.uk/xrt_positions/, and the green circles show the position of the NIR or optical afterglow as given in Table 1. A 2′′ scale bar is shown in the top left plot for GRB 071025 and the particular GROND filter is denoted in the bottom left corner of each finding chart. With the exception of GRBs 090429B, 120923A, and 131227A, we were able to detect the NIR or optical counterpart with GROND.
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