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We use radio-continuum all-sky surveys at 1420 and 408 MHz with the aim toinvestigate properties of the Galactic radio source Lupus Loop. The survey dataat 1435 MHz, with the linear polarization of the southern sky, is also used. Wecalculate properties of this supernova remnant: the brightness temperature,surface brightness and radio spectral index. For determining borders andcalculation of its properties, we use the method we have developed. Thenon-thermal nature of its radiation is confirmed. The distribution of spectralindex over its area is also given. A significant correlation between the radiospectral index distribution and the corresponding polarized intensitydistribution inside the loop borders is found, indicating that the polarizationmaps could provide us information about the distribution of interstellarmedium, and thus could represent one additional way to search for new Galacticloops.

SNR radio spectral index distribution and its correlation with polarization: a case study of Lupus Loop