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Associated Arrays

The spectra imported from Herschel-HIFI FITS are also one of the firsts to use the so-called Associated Arrays in the CLASS observation. These arrays can be found under the structure R%ASSOC%. CLASS can understand those special arrays (see below where the dedicated documentation can be found). In practice, the Herschel-HIFI spectra provides the usual intensity array (i.e. in the RY variable), but also 2 arrays of the same size (same number of channels):

Note that the Associated Arrays are removed by the commands that do not know how to process them. In this case, a warning is issued. This is being solved as the Associated Arrays are more and more integrated in CLASS. In order to know the current status, please check the dedicated documentation for your current CLASS version in the widget menu $>$ Help $>$ CLASS $>$ Associated Arrays.


next up previous contents
Next: Setting the source velocity Up: Quick start guide Previous: Observation header   Contents
Gildas manager 2023-06-01