Observations of galactic supernova remnants at 1.7 and 2.7 GHz.

Summary. Maps of fifteen galactic supernova remnants with angular resolution 5' at a frequency of 2.7 GHz are presented, and 1.7 GHz flux densities of several of the sources are given. Several of the remnants are examined in detail to determine associations between radio and optical features, spectral index variations, and the distribution of radio emissivity giving rise to the observed source structure. Analysis of a large number of remnants showing shell structure indicates that the ratio of shell thickness to source radius of supernova remnants does not evolve in any particular way as a function of surface brightness ( ). Using the assumption of equipartition it is shown that the magnetic field strength is proportional to 0,6%%MHz Point sources within the supernova remnant maps are found to be random extragalactic background sources and not knots of high surface brightness associated with the supernova remnants. Key words: supernova remnants - structure - evolution - interstellar medium