Context.The association of GRB 980425 with the nearby supernova SN 1998bw at implies the existence of a population of gamma-ray bursts with an isotropic-equivalent luminosity that is about 104 times lower than in the standard cosmological case. Apart from its weak luminosity, GRB 980425 appears a “normal” burst based on all its other properties (variability, duration, spectrum), with however a rather low peak energy of 30-100 keV.
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