This panel contains a link to a version of the Spectral Line Picker (Rest Frequency SLP or RFSLP) that allows the user to enter the rest frequencies that will be observed. These will be written to the SB at Phase 2 and used during data reduction to set the velocity scale and as part of archive searches to identify relevant data.
When this tool is first opened, it will automatically include any rest frequencies that were used to define a spectral window. It will also ask the user if they would like to add the frequencies of any overlaid lines that fall into spws. Therefore, we recommend that this tool be used once the spectral setup has been fully defined. This default list of rest frequencies can then be edited i.e. rest frequencies added or deleted. Adding or deleting spws and re-opening the tool will update the list of rest frequencies accordingly.
If a spectral window is moved such that a defined rest frequency no longer falls within an spw, this will cause a validation error and the offending line will be highlighted in red if the RFSLP is opened. It should be deleted and the tool closed. This includes spws that were created using the SLP and these must be deleted and re-entered if the line used to define the spw no longer falls within it. Users will find that Science Goals which have been extensively edited and used as the basis for new projects, perhaps in different bands, now give such validation errors.
If it is desired to start again with a revised spectral setup and/or additional overlaid lines, all rest frequencies should be deleted and the rest-frequency tool re-opened.