Package that provides the structure for joint and simulataneous fitting. That is, a single model can be jointly fitted to a series of 1D or 2D data where the user can decide which of the model parameters that should be fitted individually for each data set (e.g. an intercept or a bias) and which that should be fitted jointly (e.g. physical parameters).

The package also that provides a class for fitting models from astropy.modeling using iminuit. This can be used both for simple fitting and for joint fitting.