Fading optical source in the field of GRB020531. Dullighan, A. ; Monnelly, G. ; Butler, N. ; Vanderspek, R. ; Ford, P. ; Ricker, G. ; Ebeling, H. ; Wainscoat, R. ; Kawai, N. ; Yoshida, A. Abstract Publication: GRB Coordinates Network Pub Date: 2002 Bibcode: 2002GCN..1434....1D