085458

We propose radio continuum observations of four Galactic SNRs comma G28.6-0.1 comma G32.4+0.1 comma G347.3-0.5 comma and G353.6-0.7 comma with X-ray spectra dominated by synchrotron emission. Multi-wavelength studies of these sources are essential for improving our understanding on how SNRs accelerate cosmic-ray particles. These SNRs are all intrinsically radio faint and require sensitive observations to correlate radio features that produce X-ray emission. The radio observations will allow robust determinations of the integrated flux densities at each frequency comma along with their radio spectral indices. The L band polarization measurements will determine the direction and strength of their magnetic fields. We request a 50 ksec XMM-Newton observation of G32.4+0.1 comma essential for modeling its broadband emission.