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Asterism Selection for MAVIS instrument

Project description


This library was developed with 2 goals: support the Asterism Selection for MAVIS instrument ( and managing the computation of the jitter (i.e. tip/tilt) error in Adaptive Optics simulations done in the Fourier domain. It is used by TIPTOP (

The main features are located in:

  • mastsel/ class that computes the jitter ellipses that can be

  • convolved with High Orders (HO, i.e. aberrations of higher spatial

  • frequencies than tip/tilt) Point Spread Functions (PSF) to get the PSFs that

  • consider both the effect of HO and Low Orders (LO, i.e. tip/tilt).

  • mastsel/ that contains a set of methods and classes to compute

  • short and long exposure PSF from Power Spectral Densities (PSD), Strehl

  • Ratios, radial profiles, encircled energies (and other quantities) from PSF,

  • to convolve kernels with PSFs, …

Reference: section 5 “LOW ORDER PART OF THE PSF” of Benoit et al. "TIPTOP: a new tool to efficiently predict your favorite AO PSF" SPIE 2020 (ARXIV:

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