The Galactic Plane Survey:

This survey led by Christian Motch, is based on 26 XMM-Newton observations, obtained at | b | < 20°, distributed over a large range in Galactic longitudes and covering a summed area of 4 deg². The flux limit of this survey is 2 x 10^-15 erg cm^-2 s^-1 in the soft (0.5-2 keV) band and 1 x 10^-14 erg cm^-2 s^-1 in the hard (2-12 keV) band. A total of 1319 individual X-ray sources are detected. Using optical follow-up observations supplemented by cross-correlation with a large range of multi-wavelength archival catalogues we 316 X-ray sources have been identified, see Nebot Gómez-Morán (2013).

More information about this survey can be found in Motch (2001).