Various Memos


Most of the memos that I have written are specific to the Chandra X-ray Observatory. On this page you will find links to some that may be of more general interest. I am placing them here in the hope that the reader will find them to be of some pedagogical value.

  • The Multilayer Reflectivity memo presents a self-contained derivation of the reflection and transmission probabilties of a plane classical electromagnetc wave incident upon a multilayer with complex indices of refraction.
  • The Combining Error Ellipses memo was written to show how to combine a number of independent estimates of a source's position to obtain an improved estimate of its position. Here I have adopted a general multivariate approach and discuss tangent plane projections.
  • Creating the ``Behr Memo'' was my introduction to Bayesian methods. Here the technique is applied to the ratio of two Poisson rates (a hardness ratio).

This page was last updated Mar 31, 2013 by John E. Davis. To comment on it or the material presented here, send email to davis at space mit edu.
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