Prompt emission properties of GRB 200613

We study the prompt emission properties of the long duration GRB 200613A using Fermi-Gamma-Ray Burst Monitor (GBM) and Large Area Telescope (LAT) data. The prompt emission light curve of GRB 200613A reveals a strong peak emission up to ∼ 50 s after the burst accompanied by an extended emission up to ∼ 470 s similar to that seen in ultra-long GRB light curves. The time-integrated spectroscopy shows that the Band function best fits the main emission episode, and the extended emission follows the power-law behaviour because of poor count rates. Due to its high isotropic energy and low peak energy, GRB 200613A lies at the extreme end in both the E_ p–E_ iso and E_ p–T_90 plots. In addition to the GBM detection, the Fermi-LAT detected the highest energetic photons of 7.56 GeV after 6.2 ks since burst, which lies beyond the maximum synchrotron energy range.