The radio surroundings of the microquasar GRO J1655-40

We report the results of a study of the radio surroundings of the superlumi nal microquasar GRO J1655-40. We have searched for extended continuum struc tures that might be indicative of the presence of a supernova remnant (SNR) associated with the formation of the compact object in the binary system. We also carried out; HI-line observations of the region looking for a local minimum created by an explosive event. Our results indicate that there is, in fact, a bubble in the large-scale HI distribution around GRO J1655-40. We suggest that this structure might be created by the original supernova e xplosion occurred a few hundred thousand years ago and whose signatures can be traced by the overabundance of or-elements recently found by Israelian et al. (1999) in the companion star.