TITLE: GCN CIRCULAR NUMBER: 29867 SUBJECT: GRB 210420B: Correction to DDOTI Magnitude DATE: 21/04/21 15:58:43 GMT FROM: Alan M Watson at UNAM There was a transcription error in the DDOTI magnitude reported by Watson et al. (GCN Circ. 29858) for GRB 210420B. The correct magnitude is w = 20.47 +/- 0.09.