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This is the documentation for the updated version of the code used in the following papers :

• Toward mapping turbulence in the intra-cluster medium III. Constraints on the turbulent power spectrum with Athena/X-IFU

• Toward mapping turbulence in the intracluster medium IV. Using NewAthena/X-IFU and simulation-based inference to constrain turbulence

This code can : - Simulate a toy-model galaxy cluster on a discret grid (with its density, norm, temperature, abundance, velocity) - Simulate a random realization of a velocity field drawn from a known power spectrum - Create a photon list from the list of properties of the cluster (this can be extended to any simulation output). The emission is assumed to be a bapec model, with a single abundance. - Launch several SIXTE processes in parallel to simulate an X-IFU observation of the cluster. - Manage the SIXTE outputs to make a single event list, count map, make a Vornoi binning of the map and create spectra for each bin. - Do the spectral fitting of all synthetic spectra in parallel. - Create output maps (and velocity structure function)