1 Introduction

The 2.56-m Nordic Optical Telescope located on La Palma is an almost ideal telescope for rapid response observations because of its good seeing, its flexibility and the constant availability of an optical imager. We have conducted a GRB ToO programme for several years and have imaged most known optical afterglows to gamma-ray bursts (GRBs). In May 1997 we obtained images of GRB 970508 3 hours after the BATSE trigger [6, (Jaunsen et al. 1997)] and later found the first evidence for a flattening of the power law decay of the light curve, indicative of the presence of a host galaxy [9, (Pedersen et al. 1998)]. More recently, NOT has contributed to observations of GRB 980329 [8, (Palazzi et al. 1998)] and GRB 980703 [1, (Castro-Tirado et al. 1999)]. In this contribution we describe our discoveries of two recent SAX GRBs, namely GRB 980519 and GRB 980613.