Fig. 3
As Fig. 1, but for 7 more INTEGRAL sources of our sample (see Table 1). The image of the field of IGR J20450+7530 (centre right panel) has been extracted from the DSS-II-Infrared survey, whereas the one of IGR J18371+2634 (upper right panel) shows the optical counterparts of both X-ray objects reported in Landi et al. (2011, see also Sect. 4.3 of the present work).
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