CIRCE Version 1.0: Beam Spectra for Linear Collider Physics
  I describe parameterizations of realistic $e^\pm$- and $\gamma$-beam spectra at future linear $e^+e^-$-colliders. Emphasis is put on simplicity and reproducibility of the parameterizations, supporting reproducible physics simulations. The parameterizations are implemented in a library of distribution functions and event generators. 
Thorsten Ohl (TH Darmstadt)