burst would have released a total of assuming isotropic emission. Notes References Costa, E. et al. (1997a) "IAU Circular 6572: GRB 970228; 1997aa". International Astronomical Union. Fox, D. W. et al. (6 May 1997) "IAU Circular 6643: GRB 970228; 1997by". International Astronomical Union. Groot, P. J. et al. (12 March 1997) "IAU Circular 6584: GRB 970228". International Astronomical Union. Groot, P. J. et al. (14 March 1997) "IAU Circular 6588: GRB 970228". International Astronomical Union. Hurley, K. et al. (8 March 1997) "IAU Circular 6578: GRB 970228". International Astronomical Union. Retrieved on 23 February 2010. Pedichini, F. et al. (22 April 1997) "IAU Circular 6635: GRB 970228; C/1995 O1". International Astronomical Union. External links Gamma-ray Burst 970228 BeppoSAX follow-up observations of the region of the Gamma-ray burst GRB 970228 19970228 970228 February 1997 events