Observed radial (top) and angular (bottom) profiles of PSO J0309+27 in the 0.5–7 keV energy band. In both cases the background has been subtracted and data points have Poissonian uncertainties. The dashed black line in the top panel is the expected PSF of the observation, computed with MARX. The vertical blue lines delimit the extraction region considered for the spectral analysis of the jet, and the area delimited by the grey lines is where the counter-jet is expected (see Sect. 2.3.2). The direction of the PA in the lower panel is east of north.