2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/178533We have examined 8004 plates at the Harvard College Observatory Plate Collection searching for optical transient emission from the gamma-ray burst GRB 970228. This is the first archival search carried out so far for a gamma-ray burst with known transient optical emission. The total exposure time amounts to ~1.1 yr. No convincing optical activity was found above 12.5 mag at the expected position of the GRB 970228 optical counterpart.2 pages, 1 encapsulated PostScript and 1 jpeg figure included. Uses Astronomy & Astrophysics LaTeX macros. Accepted for publication in A&AAstrophysicstext