Prompt emission properties of GRB~200613

We study the prompt emission properties of the long duration GRB~200613A using $\mathit{\text{Fermi}}$-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 $\sim$ 50 s after the burst accompanied by an extended emission up to $\sim$ 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 $E_{\mathrm{p}}$–$E_{\mathrm{i}\mathrm{s}\mathrm{o}}$ and $E_{\mathrm{p}}$–$T_{90}$ plots. In addition to the GBM detection, the $\mathit{\text{Fermi}}$-LAT detected the highest energetic photons of 7.56 GeV after 6.2 ks since burst, which lies beyond the maximum synchrotron energy range.