Cash, W., Parameter estimation in astronomy through application of the likelihood ratio, ApJ, 228, p. 939 (1979)
Cruddace, R. G., Hasinger, G., Schmitt, J. H., The application of a maximum likelihood analysis to detection of sources in the ROSAT database, in `Astronomy from large Databases', eds. Murtagh, F. and Heck, A., p. 177 (1988)
Mateos, S., Saxton, R. D., Read, A. M., Sembay, S., Statistical evaluation of the flux cross-calibration of the XMM-Newton EPIC cameras, A&A 496, 879 (2009), e-print arXiv:0901.4026
Rosen, S. R., Webb, N. A., Watson, M. G., et al., The XMM-Newton serendipitous survey. VII. The third XMM-Newton serendipitous source catalogue, A&A 590, A1 (2016), e-print arXiv:1504.07051
Traulsen, I., Schwope, A. D., Lamer, G., et al., The XMM-Newton serendipitous survey. VIII. The first XMM-Newton serendipitous source catalogue from overlapping observations, A&A 624, A77 (2019), e-print arXiv:1807.09178
Traulsen, I., Schwope, A. D., Lamer, G., et al., The XMM-Newton serendipitous survey. X. The second source catalogue from overlapping XMM-Newton observations and its long-term variable content, A&A 641, A137 (2020), e-print arXiv:2007.02932
Webb, N. A., Coriat, M., Traulsen, I., The XMM-Newton serendipitous survey. IX. The fourth XMM-Newton serendipitous source catalogue, A&A 614, A136 (2020), e-print arXiv:2007.02899
