Broadband SEDs of GRB 160131A at 0.8 d (top left), 1.7 d (top right), 2.7 d (bottom left), and 5.8 d (bottom right). Blue (red) points are measured (linearly interpolated in a log-log plot) data. These SEDs display radio peaks (at 0.8 d, 1.7 d, and 5.8 d) and dust extinction (red shaded regions, especially at 0.8 d). The green dashed line shows the resulting modelling of the high-energy data (optical/X-ray). Filled circles indicate detections, and upside-down triangles indicate 3σ upper limits.