GCN Circular 37964
Subject
GRB 241025A: The discovery of a BdHN I from data of Swift, Fermi, SVOM and Einstein Probe telescopes
Event
Date
2024-10-30T12:11:00Z (9 months ago)
From
Remo Ruffini at ICRA <ruffini@icra.it>
Via
Web form
R. Ruffini, L. Becerra, C.L. Bianco, M. Della Valle, Liang Li, G.J. Mathews, M.T. Mirtorabi, R. Moradi, F. Rastegar Nia, J.A. Rueda and Y. Wang
We are comparing and contrasting the seven episodes of BdHN I observed in GRB 241025A with Eiso = 5.5 x 10^53 erg (GCN 37927) and GRB 220101A with Eiso = 3.7 x 10^54 erg (GCN 31365). Both are highly energetic and located at a redshift greater than 4 (GCN 37866, GCN 31353), which allows a zoom-in investigation due to cosmological expansion. By examining the onset of black hole formation and the ultra-relativistic prompt emission (UPE), we gain insight into the rotational dynamics within these systems. This investigation requires additional observational data, particularly optical emission measurements from the newly born pulsar and extended X-ray afterglow data up to more than 10^6 seconds. Concurrent monitoring by Fermi-LAT will be crucial for capturing high-energy emissions, while the already performed Fermi-GBM observations enable the identification of the jetted emission. On this basis, the energy extraction process from a newly formed black hole will be determine.