The equipartition or minimum-energy calculation is a well-known procedure for estimating magnetic field strength and total energy in the magnetic field and cosmic ray particles by using only the radio synchrotron emission .
In one of our previous papers we have offered a modified equipartition calculation for supernova remnants ( SNRs ) with spectral indices 0.5 < \alpha < 1 .
Here we extend the analysis to SNRs with \alpha = 0.5 and \alpha = 1 .