Example usage

Galactus automatically is run straight from its home folder. So if you haven't got the tarball, make sure you do. Unpack it at your favorite location and make sure that you have run ./buildme afterwards.

Galactus uses .ini files for all its galaxy operations. In this way you can easily tweak, copy and edit files without losing any of the [Parameters].

In general, we distinguish between two modes: modeling and fitting.

Galactus automatically switches to modeling if the ini-file has image = None. In such a case the command would become:

./Galactus galaxies/model.ini

It is also possible to force Galactus to only generate a model from a ini-file. This could be handy if you want to have a quick look at an initial guess for parameters. This can be done by adding the -N keyword to the command line. Note that the -N also adds [Noise] to the generated cube.

./Galactus -N galaxies/fitting.ini

The other main mode, fitting, can be easily run by starting it as

./Galactus galaxies/fitting.ini

Note that the fitting can take up to a couple of days to get right, so you might want to start it in a screen session.

Galactus comes equiped with a demonstration file, named UGC7321.ini. You can play around with the parameters from there.

See also the [Fitting] page for more information on fitting.