Time resolved spectral behavior of bright BATSE precursors
Time resolved spectral behavior of bright BATSE precursors
<i>Aims. <i/>Gamma ray bursts (GRBs) are sometimes preceded by dimmer emission episodes, called "precursors", whose nature is still a puzzle: they could either have the same origin as the main emission episode or they could be due to another mechanism. We investigate if precursors have some spectral distinctive feature with …