Wide-field map around SNR G016.8−01.1. The grey scale corresponds to the Parkes-MIT-NRAO survey at 5 GHz (Tasker et al. 1994). The green and red lines mark the past trajectory of LS 5039 and PSR J1825−1446, respectively. The arrows mark the proper motion sense. Circles are plotted in the trajectories every 10⁴ yr. The contours represent the 68.2, 95.4 and 99.7% confidence levels on the position that LS 5039 had 10⁵ and 5 × 10⁴ years ago (see uncertainties in the proper motion shown in Fig. 5). The grey dotted lines show the Galactic coordinates.