Image showing the intensity of the radio emission measured by the Very Large Array (VLA) (Frail et al. 1994) at 330 MHz in the vicinity of PSR B1706−44, smoothed with a Gaussian of width σ = 0.03°. The observations have a half-power beamwidth of 0.03° × 0.015°. The radio arc of the partial shell-type SNR G 343.1−2.3 is clearly visible as well as the diffuse emission both inside and outside the arc. The white contours correspond to a smoothed VHE excess of 0.14, 0.17, and 0.21 γ-rays arcmin-2, taken from the image in Fig. 1, left. The horizontal stripes visible at Dec = −44°40′ and Dec = −43°47.5′ are imperfections which resulted from the joining of data to form the final wide-field image (Frail et al. 1994). The bright point source at the center of the radio image is PMN J1708−4419, likely an extragalactic object seen in projection (see Sect. 4.3).
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