We have presented the results of a second epoch of global Very Long Baseline Interferometry observations , taken on 23 February 2001 at a wavelength of 18 \mathrm { cm } , of the central kiloparsec of the nearby starburst galaxy Messier 82 .
These observations were aimed at studying the structural and flux evolution of some of the compact radio sources in the central region that have been identified as supernova remnants .
The objects 41.95+575 and 43.31+592 have been studied , expansion velocities of 2500 \pm 1200 \mathrm { km } \mathrm { s } ^ { -1 } and 7350 \pm 2100 \mathrm { km } \mathrm { s } ^ { -1 } respectively have been derived .
Flux densities of 31.1 \pm 0.3 \mathrm { mJy } and 17.4 \pm 0.3 \mathrm { mJy } have been measured for the two objects .
These results are consistent with measurements and predictions from previous epochs .