The following is a list if minor planets down to V=22 within 10 arcminutes of the center of the field This list was generated using MPChecker at the IAU Minor Planet Center.
Charts and more info on this GRB at http://www.aavso.org/grb/archive/ Please note that the MPC MPCHecker server is sometimes down or very slow, so if data does not exist here you may have to visit them manually at http://scully.harvard.edu/~cgi/CheckMP