*4.1. GRB 160821B*

GRB 160821B is a short GRB at *z* = 0.162 detected by the Swift-BAT [141] on 21 August 2016 at *T*<sup>0</sup> = 22 : 29 : 13 UT and by the Fermi-GBM [142]. The analysis of MAGIC observations shows a ∼ 3*σ* excess at the GRB position.
