NTT images (60″ × 35″) of the fields of XTE J1637−498, IGR J17379−3747, IGR J17585−3057 and GX 9+1 with the X-ray 90% position marked. IGR J17379−3747 is an EFOSC2 R band image, while all others are SofI KS band images; all have a common scaling and orientation.
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