  G1.9+0.3 is the youngest known Galactic supernova remnant (SNR) and dominated
by X-ray synchrotron emission. Synchrotron X-rays can be a useful tool to study
the electron acceleration in young SNRs. The X-ray spectra of young SNRs give
us information about the particle acceleration at the early stages of evolution
of SNRs. In this work, we investigate the time evolution of roll-off frequency
of the synchrotron spectrum from SNR G1.9+0.3 using Suzaku. For this analysis,
we use ~101 ks (2011) and ~92 ks (2015) observations with the X-ray Imaging
Spectrometer. We find that there are no significant differences in the spectral
parameters and interpret our results.
