Unbinned maximum-likelihood estimators for low-count data - Applications to faint X-ray spectra in the Taurus molecular cloudK. Arzner, M. Güdel, K. Briggs, A. Telleschi, M. Schmidt, M. Audard, L. Scelsi and E. FranciosiniA&A, 468 2 (2007) 501-514DOI: https://doi.org/10.1051/0004-6361:20064927
