Speaker
Description
Historically, gamma-ray bursts (GRBs) are categorised into two classes: short GRBs (duration < 2 s) that are linked to compact object mergers and long GRBs linked to the death of massive stars. However, recent observations have shown that the population of GRBs is more complex. Understanding atypical GRBs can shed more light on this population and the progenitor systems. We present the observations of GRB 210704A: a burst with a short main emission peak followed by a faint high-energy emission tail. Multi-wavelength observations show an optical and infrared excess, peaking days after the GRB. We use the Bayesian inference package Redback to fit EM transients to the multi-band data of GRB 210704A to understand the origin of the excess and shed light on the progenitor system.
