Chandra images of 5–7.5 keV centred on the position of Xp12 (as indicated by two lines) taken in the three observations in Period I (1999–2002) and ObsID 10542 in 2009. The exposure times are 66 ks and 118 ks, respectively. Observed counts in the aperture centred on Xp12 are 12 counts (the contribution of diffuse emission counts for the same aperture estimated from the surrounding region is 12 ± 3.5 counts, meaning no excess) in Period I. In ObsID 10542, the image registered 56 counts for the Xp12 aperture, including the estimated diffuse emission of 25 ± 5 counts, leaving an excess of 31 counts.