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Recent observations of the microwave sky, by the space telescopes such asWMAP and Planck, have opened a new window into the analysis of continuumemission from supernova remnants (SNRs). In this paper, different emissionmodels that can explain the characteristic shape of presently known integratedradio/microwave continuum spectrum of the Galactic SNR IC 443 are tested anddiscussed. In particular, the possibility that the slight bump in theintegrated continuum of this remnant around 20 -- 70~GHz is genuine and thatcan be explained by the contribution of additional emission mechanism such asof spinning dust is emphasized. We find that adding a spinning dust componentto the emission model improves the fit of the integrated spectrum of this SNRwhile, at the same time preserves the physically probable parameter values.Finally, models that include the high-frequency synchrotron bending of the IC443 radio to microwave continuum are favored.

A new look at the integrated radio/microwave continuum spectrum of Galactic supernova remnant IC443