Extended Data Fig. 2: Temporal evolution of the UV through NIR SED of the counterparts to GRB 211211A and GW170817. | Nature

Extended Data Fig. 2: Temporal evolution of the UV through NIR SED of the counterparts to GRB 211211A and GW170817.

From: A kilonova following a long-duration gamma-ray burst at 350 Mpc

Extended Data Fig. 2: Temporal evolution of the UV through NIR SED of the counterparts to GRB 211211A and GW170817.The alternative text for this image may have been generated using AI.

Circles or squares represent detections, whereas triangles represent upper limits. For both GRB 211211A (solid lines) and GW170817 (dashed lines), the counterparts’ SEDs at 4–5.1 days post-burst (dark blue and purple) demonstrate a notable reddening compared with those at earlier epochs.

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