Posted in astro-ph.HE · 2026-01-07 · A. Rossi, L. Izzo, K. Maeda, P. Schady, D. B. Malesani, D. A. Kann, S. Klose, L. Amati, P. D'Avanzo, A. de Ugarte Postigo, K. E. Heintz, A. Kumar, V. Lipunov, A. Martin-Carrillo, A. Melandri, A. M. Nicuesa Guelbenzu, S. R. Oates, S. Schulze, J. Selsing, R. L. C. Starling, G. Stratta, D. Vlasenko, P. Balanutsa, R. Brivio, V. D'Elia, B. Milvang-Jensen, E. Palazzi, D. A. Perley, A. Rau, J. Sollerman, N. R. Tanvir, T. Zafar
The long GRB 180728A, at a redshift of $z = 0.1171$, stands out due to its high isotropic energy of $E_{γ,iso} \sim 2.5 \times 10^{51}$ erg, in contrast with most events at redshift $z<0.2$. We analyze the properties of GRB 180728A's prompt emission, afterglow, and associated supernova SN 2018fip, comparing them with other GRB-SN...