Journal
ASTROPHYSICAL JOURNAL
Volume 653, Issue 2, Pages 1566-1570Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/508677
Keywords
methods : statistical; X-rays : general; X-rays : ISM
Categories
Ask authors/readers for more resources
Hardness ratios are commonly used in X-ray photometry to roughly indicate spectral properties. They are usually defined as the ratio of counts in two different wave bands. This definition, however, is problematic when the counts are very limited. Here we instead define the hardness ratio using the lambda-parameter of Poisson processes and develop an estimation method via Bayesian statistics. Our Monte Carlo simulations show the validity of our method. Based on this new definition we can estimate the hydrogen column density for the photoelectric absorption of X-ray spectra in the case of low counting statistics.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available