... Archives . ... ArXiv] 4th week, Oct. 2007 . ... In search of an unbiased temperature estimator for statistically poor X-ray spectra . ... I was very excited because I haven?t seen any astronomical papers discussing unbiased estimators solely. By the same token that the authors discussed bias in the о‡^2 method and the maximum likelihood estimator, we know that the о‡^2 function is not always symmetric for applying н”о‡^2 =1 for a 68% confidence interval. ... Chandra Blog . ...