GRB 210306A after glow observed with iTelescope T24 remote telescope. Photo by: Markku Nissinen.   Full GCN Circular https://gcn.gsfc.nasa.gov/gcn/gcn3/29603.gcn3 and below. TITLE: GCN CIRCULAR NUMBER: 29603 SUBJECT: GRB 210306A: iTelescope T24 optical observations DATE: 21/03/06 14:23:19 GMT FROM: Veli-Pekka Hentunen at Taurus Hill Obs,A95 Veli-Pekka Hentunen and Markku Nissinen (Taurus Hill Observatory, Varkaus, Finland) report: […]