Fig. 1
Left panel: GTC/OSIRIS ~51′′× 51′′ Sloan g′-image fragment of the PSR J0357+3205 field. The circle shows 3σ X-ray pulsar position uncertainty for the optical observations epoch (see text for details). The 15′′× 15′′ pulsar vicinity within the dashed rectangle is enlarged in the right panel and smoothed with a one-pixel Gaussian kernel. The sources discussed in the text are labelled by numbers
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