Line ratio analysis

[djpisano3]

For multi-line cubes (with two different emission lines associated with the same source), it can be useful to look at line ratios (to identify supernova remnants, for example). Having a tool that would take the ratio of two masked regions would be a great help with this. Also, this would allow a user to compare fluxes from the same line in two different sources. For example, you may want to determine what the HI mass ratio is between two different galaxies in a cube. It would just require the option to select two masked regions and calculate a ratio of them. You could use some of the moment map analysis tools to do this as well (the moment 1 map of two different masked regions would vary based on the line ratio of two different lines).