Skip to the navigation links
Last modified: 26 October 2020

URL: https://cxc.cfa.harvard.edu/sherpa/bugs/poisson.html

Bugs: poisson


Bugs

Implemented model is incorrect.

The Poisson model has a functional form of:

\[ f(x) = A\frac{\mu!}{x!}\exp(x-\mu) \]

but as implemented, the model is:

\[ f(x) = A\mu^{x-\mu}\exp(\mu!-x!) \]