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Caption: Figure 1.
Prompt emission properties of GRB 260310A. (a). Fermi/GBM count-rate light curves from NaI detectors na and nb in the 50–300 keV energy band. The black lines and gray lines represent the net counts and errors with a bin size of 2 s. (b). Accumulated counts. The blue horizontal solid (dashed) lines are drawn at 0%–100% (5%–95%) of the total accumulated counts. The vertical lines in (a) and (b) represent the T90 interval. (c). Amati relation diagram (L. Amati et al. 2002; B.-B. Zhang et al. 2018a, 2018b). Type I (short) and Type II (long) GRBs are shown as gray and blue circles, and the corresponding solid lines and dashed regions are the best-fit models and 95% c.l., respectively. The red star marks the position of GRB 260310A. Other outliers (GRBs 980425, 031203, 061021, 161219B, and 171205A) are marked as orange squares.
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