Performance of the Argo-YBJ detector operated in scaler mode

The ARGO-YBJ experiment in Tibet has been designed to decrease the energy threshold of typical EAS arrays by exploiting the high altitude location (4300 m a.s.l.) and the full coverage (92 %). The lower energy limit of the detector (E 1 GeV) is reached by the single particle technique, recording the counting rate at x ed time intervals. At these energies, local (e.g. solar GLE) and cosmological (e.g. GRBs) effects are expected as a signicant enhancement of the counting rate over the background. Results on the search of GRBs in coincidence with Swift, HETE and Integral satellites are presented.