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Spline noise model implemented#260

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LucaZapelli wants to merge 5 commits intoCosmoglobe:hfifrom
LucaZapelli:hfi
Open

Spline noise model implemented#260
LucaZapelli wants to merge 5 commits intoCosmoglobe:hfifrom
LucaZapelli:hfi

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Spline noise model has n_log + n_lin +1 parameters, which are the number of spline nodes + sigma0. The nodes are computed by setting a frequency threshold (currently 1 Hz), and performing a logarithmic binning before the threshold and a linear binning after, based on the specified number of nodes.
To go back to 1/f model, change line 73 in comm_tod_hfi_smod.f90.

Also minor updates to rolloff deconvolution and 4k lines fitting routines are pushed.

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