TITLE: GCN CIRCULAR NUMBER: 33557 SUBJECT: GRB 230228A: detection by GTC of the potential host galaxy DATE: 23/04/03 03:19:37 GMT FROM: Youdong HU at IAA-CSIC huyoudong072@hotmail.com

Y.-D. Hu, E. Fernandez-Garcia, A. J. Castro-Tirado, I. Perez-Garcia, M.D. Caballero-Garcia, R. Sanchez-Ramirez (IAA-CSIC), Bin-bin Zhang (NJU) and D. Garcia (GTC, IAC) on behalf of a larger collaboration, report:

Following the detection of short GRB 230228A by Swift (Dichiara et al. GCN 33378), we triggered the 10.4 m Gran Telescopio de Canarias (GTC) in La Palma (Spain) to image the GRB location with the OSIRIS instrument in two epochs (Mar 1 20:16 UT and Mar 3, 20:02 UT, 1.6 and 2.6 days post-burst respectively). Within the XRT error region, a constant brightness (z-band magnitude = 23.6) is found, which we suggest as the potential host galaxy of this burst.

We thank the excellent support from the GTC staff.