envelope

tayph.envelope(wlm, fxm, binsize, selfrac=0.05, mode='top', threshold='')

This routine measures the top or bottom envelope of a spectrum (wl,fx), by chopping it up into bins of size binsze (unit of wl), and measuring the mean of the top n-% of values in that bin. Setting the mode to ‘bottom’ will do the oppiste: The mean of the bottom n-% of values. The output is the resulting wl and flux points of these bins.

Parameters

wlmnp.ndarray

The wavelength axis.

fxmnp.ndarray

The flux axis.

binsizeint, float

The width of the bin within which to measure the continuum, in units of wavelength.

selfrac: float

The top fraction of values in each bin to be used to measure the continuum. Default 0.05.

modestr

The direction in which the envelope is measured. Can be set to “top” or “bottom”. Default “top”.

Returns

wlenp.array

The wavelength points associated with the envelope.

fxenp.array

The corresponding flux points describing the envelope.