Setting Redshift/RV
The Line Lists Plugin contains a redshift slider as well as the ability to view and set the redshift and/or radial velocity.
Additionally, the Line Analysis Plugin includes the capability to compute and assign the redshift based on the measured centroid of a line.
From the notebook
The range of the slider, as well as the resolution of a single
step in the slider, can be set from a notebook cell using the
set_redshift_slider_bounds()
method in specviz
by specifying the range
and/or step
keywords. By setting either or both
of these to ‘auto’, they will default based on the x-limits of the spectrum plot.
The redshift itself can be set from the notebook using the set_redshift
method.
Any set redshift values are applied to spectra output using the
jdaviz.configs.specviz.Specviz.get_spectra
helper method.
Note that using the lower-level app data retrieval (e.g.,
specviz.app.get_data_from_viewer()
) will return the data as
originally loaded, with the redshift unchanged.