Contour map of the polarised intensity of the Leo Triplet at 2.64 GHz. Superimposed are the apparent B-vectors of the polarisation degree overlaid upon the blue image from DSS. The contour levels are 3, 5, 10, 20 and 50 × 0.35 mJy /beam. A polarisation vector of 1′ corresponds to a polarisation degree of 2%. The TDG candidate is marked with an arrow. The beam size is .
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