Fig. 1

GMRT 610 MHz image (black contours). The contours correspond to 2, 3, and 4 times 0.22 mJy beam-1, the rms, and the beam size is 12.2″ × 4.8″. The colour image shows the VGPS data of the SNR G35.6−0.4 at 1.4 GHz with arcminute resolution (Stil et al. 2006). The HESS significance contours (4, 5, and 6σ, in magenta) for the location of HESS J1858+020 are overlaid.
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