Sketch of the Carina region with the positions of the various X-ray surveys. The regions are superposed to an R filter image where the open clusters Tr 14 and Tr 16 are located. Starting from Tr 16, note the well-known V-shaped dark lane (appearing white). The field investigated here is on the right side, indicated by a circle (red in the electronic version of the paper, dark-grey in the printed version). The other two circles (light-blue, looking light-grey) represent the survey reported by Antokhin et al. (2008). Both surveys are based on XMM-Newton observations. The two squares (red/dark-grey) represent the Chandra pointings analysed by Evans et al. (2003, 2004) and Albacete-Colombo et al. (2008). The latter corresponds to the less tilted square. The third square (yellow/white) stands for the Suzaku investigation (Ezoe et al. 2009).