RMs from the RM cube of the combined λ18 cm and λ22 cm data above a 5σ detection limit using the differential technique. In the lower right we show the size of the synthesised beam (43.̋1 × 39.̋6). The galactic foreground RM of –19.65 rad m^-2 was corrected for. Only |RM| values between 84 rad m^-2 and 600 rad m^-2 were searched for in the RM cube on which the image was based. The red cross marks the optical centre of the galaxy.