Merged intensity image of the 16 Chandra observations analyzed in this work (the log of the observations is summarized in Appendix A). The observations were taken with the ACIS-I array, and the image is exposure corrected. We highlight the boundaries of the count distribution of each source at a 3σ level through white ellipses. The magenta ellipses present the source locations along with their 1σ uncertainty in position. ULX1-4 and X6 were detected by wavdetect, while ULX5 was manually added as described in the text.