A comprehensive broadband analysis of the high-redshift GRB 240218A

Open Access

Table 5.

Broadband light curve physical modelling results.

Parameter	Spreading jet	Non-spreading jet
θ_v [rad]	0.05 $_{- 0.01}^{+ 0.01}$ $^{+0.01}_{-0.01}$	0.04 $_{- 0.005}^{+ 0.003}$ $^{+0.003}_{-0.005}$
θ_c [rad]	0.01 $_{- 0.002}^{+ 0.002}$ $^{+0.002}_{-0.002}$	0.01 $_{- 0.001}^{+ 0.001}$ $^{+0.001}_{-0.001}$
θ_w [rad]	0.72 $_{- 0.44}^{+ 0.41}$ $^{+0.41}_{-0.44}$	0.79 $_{- 0.46}^{+ 0.51}$ $^{+0.51}_{-0.46}$
log(E₀) [erg]	54.72 $_{- 0.08}^{+ 0.11}$ $^{+0.11}_{-0.08}$	55.10 $_{- 0.06}^{+ 0.08}$ $^{+0.08}_{-0.06}$
log(n₀) [cm⁻³]	1.24 $_{- 0.44}^{+ 0.35}$ $^{+0.35}_{-0.44}$	1.79 $_{- 0.27}^{+ 0.23}$ $^{+0.23}_{-0.27}$
p	2.05 $_{- 0.01}^{+ 0.01}$ $^{+0.01}_{-0.01}$	2.11 $_{- 0.02}^{+ 0.02}$ $^{+0.02}_{-0.02}$
log(ε_e)	–0.13 $_{- 0.03}^{+ 0.11}$ $^{+0.11}_{-0.03}$	–0.53 $_{- 0.07}^{+ 0.06}$ $^{+0.06}_{-0.07}$
log(ε_B)	–2.48 $_{- 0.21}^{+ 0.27}$ $^{+0.27}_{-0.21}$	–4.70 $_{- 0.19}^{+ 0.19}$ $^{+0.19}_{-0.19}$

Notes. Results of the broadband light curve physical modelling with an off-axis Gaussian jet. The fit results for both a spreading and non-spreading jet are presented. The reported values represent the medians of the posterior distributions, with errors corresponding to the 16th and 84th percentiles. The corresponding corner plots are shown in Appendix E.

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