We report on the status of our search for X-ray afterglows of gamma-ray burts (GRBs) using ROSAT all-sky survey (RASS) date. The number of potential X-ray afterglow candidates with respect to the expected number of bearmed GRBs allows to constrain the relative beaming angles of GRB emission and afterglow emission at about 1-5 hrs after the GRB
