Allegro has developed a simple cookbook that describes how to use CASSIS, a free interactive spectrum analyser. It is a powerful and user-friendly software to efficiently analyse spectral lines, for example to determine physical conditions like column densities and excitation temperatures of different molecules.
The cookbook material can be downloaded from the Allegro website. It describes how to use CASSIS with a special emphasis on ALMA observations, including instructions on how to extract a spectrum from ALMA data in a format that can be read by CASSIS. The document comes with hands-on practice material that can be downloaded as well. The material contains a copy of the cookbook, scripts, an ALMA dataset that can be used to extract a spectrum from, a spectrum formatted for CASSIS, and a folder with codes and files relevant for scripting CASSIS. Detailed instructions on how to install and use CASSIS can be found on the CASSIS website.
Don’t hesitate to e-mail us if you would like to use CASSIS on the Allegro computing nodes or if you encounter any issues using the cookbook.
Enjoy CASSIS in the ALMA era!