Polarised intensity in the centre of NGC253. Upper panels: Maps of the linearly polarised intensity. The vectors indicate the magnetic field orientation and are displayed only at pixels where PI/σ_PI > 3. Centre panels: S/N maps of the polarised intensity with contours corresponding to [1, 3, 5, 10]×PI/σ_PI. White stars in the lower left panel indicate the positions of the SSCs catalogued by Leroy et al. (2018). The synthesised beam of the data is indicated in the bottom left corner, and the pixel selection threshold is shown in the top right corner. Both maps have been obtained selecting pixels with total intensity above 3σ. Bottom panels: Histograms of polarised intensity pixel values in the map. The empty histogram shows the distribution of pixels with total intensity above 3σ, while the solid green and blue histograms are the distribution of pixels with polarised intensity above 1σ and 3σ, respectively. The Band 4 and Band 7 results are shown in the top row and the bottom row, respectively.