pyplatefit is a python package for emission and absorption lines fit of MUSE spectra. It is inspired by the IDL routine Platefit originally developed by Christy Tremonti, Jarle Brinchmann for the SDSS project (Tremonti et al. 2004;. Brinchmann et al. 2004). The continuum fit is a direct python translation of the IDL routines. The emission and absorption line fitting has been completely rewritten from scratch in python using the lmfit python fitting module. Compared to the original IDL version, the python routine offer the following improvements:

• Asymmetric gaussian single and double fit for the lyman-alpha line
• Separate fit for resonant lines
• Allow various minimization algorithms
• Improved Equivalent width estimate
• Flexibility of a python code
• Improved error estimate using MCMC emcee python module

The continuum fitting code has been developed by Madusha Gunawardhana and the original line fitting code was developed by Yannick Roehlly. Jarle Brinchmann provide critical help in the validation process and explanation of the original IDL code. The final code is developed and maintained by Roland Bacon.

If you use this software, please cite Bacon et al, 2022, A&A [in prep]

See on-line documentation at https://pyplatefit.readthedocs.io/en/latest/