Most important discoveries in the pre-Swift era >1967: Klebesadelet al 's discovery >1992: spatial distribution(BATSE) >1997: observations on multiwavelength the redshift of GRB970508(BeppoSAy'of afterglows of GRB970228 and detection >1998 association of grb980425 with SN1998bw(BeppoSAX >2003: association of grbo30329 with SN2003dh (HETE-2)Most important discoveries in the pre-Swift era ➢ 1967: Klebesadel et al.’s discovery ➢ 1992: spatial distribution (BATSE) ➢ 1997: observations on multiwavelength afterglows of GRB970228 and detection of the redshift of GRB970508 (BeppoSAX) ➢ 1998: association of GRB980425 with SN1998bw(BeppoSAX) ➢ 2003: association of GRB030329 with SN2003dh(HETE-2)