Extended Data Fig. 1: Prompt gamma-ray phase of GRB 211211A.
From: A nearby long gamma-ray burst from a merger of compact objects
a,b, The Swift background subtracted light curves of GRB 211211A are shown in two energy bands and compared with the time history of GRB 060614 (grey shaded area) rescaled at a distance of 346 Mpc. The time bin is 1 s. Error bars are 1σ. Both bursts display a first episode with hard spectrum (dominant in GRB 211211A), followed by a long-lasting tail with soft spectrum (dominant in GRB 060614). c, The inset magnifies the first 12 s, showing a weak precursor at T0 preceding the main prompt event. The time bin is 16 ms.
