Star counts in the Galaxy - Simulating from very deep to very shallow photometric surveys with the TRILEGAL code

  title={Star counts in the Galaxy - Simulating from very deep to very shallow photometric surveys with the TRILEGAL code},
  author={L{\'e}o Girardi and Martin A. T. Groenewegen and Evanthia Hatziminaoglou and Luiz Nicolaci da Costa and OATrieste and Leuven and Eső and Iac},
  journal={Astronomy and Astrophysics},
We describe TRILEGAL, a new populations synthesis code for simulating the stellar photometry of any Galaxy field. The code attempts to improve upon several technical aspects of star count models, by: dealing with very complete input libraries of evolutionary tracks; using a stellar spectral library to simulate the photometry in virtually any broad-band system; being very versatile allowing easy changes in the input libraries and in the description of all of its ingredients - like the star… 
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