Left: IBIS/ISGRI mosaic extracted with the OSA software from the SCW 51 in revolution 1215 (20−80  keV energy band). We indicated (green squares) on the mosaic the position of 4 sources detected with a sufficiently high significance (SWIFT J174510.8−2624, GRS 1758−258, GX 1+4, IGR J17464−3213) and that previously reported for IGR J18175−2419. The latter is indicated by using a yellow circle with a radius of 24′ centred on the source best position provided by Grebenev (2013). Right: significance map obtained with the BATIMAGER software (Segreto et al. 2010a) in the 20−80  keV energy band for the SCW 51. Green circles (24′ radius) shows the positions of all sources significantly detected in the field, as well as the position of IGR J18175−2419, as reported by Grebenev (2013). In either mosaic, independently built with different software, we do not detect any significant emission from IGR J18175−2419. The bars at the bottom of each mosaic indicate the colour codes for the detection significances in units of standard deviations.