  We use radio-continuum all-sky surveys at 1420 and 408 MHz with the aim to
investigate properties of the Galactic radio source Lupus Loop. The survey data
at 1435 MHz, with the linear polarization of the southern sky, is also used. We
calculate properties of this supernova remnant: the brightness temperature,
surface brightness and radio spectral index. For determining borders and
calculation of its properties, we use the method we have developed. The
non-thermal nature of its radiation is confirmed. The distribution of spectral
index over its area is also given. A significant correlation between the radio
spectral index distribution and the corresponding polarized intensity
distribution inside the loop borders is found, indicating that the polarization
maps could provide us information about the distribution of interstellar
medium, and thus could represent one additional way to search for new Galactic
loops.
