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Using ULySS

The ULySS package requires the GDL (free) or IDL (proprietary) compiler.
The sources, the models and some demonstration data can be downloaded as a single gzipped tar file containing routines, models and data:
There is a unix configuration script and a makefile to test some dependencies and to set the paths to the sources. After unpacking the tar file, type in the main directory: make install. (the package was also reported to work under M-S windows, but is not routinely tested with this system).
The GDL/IDL file uly_startup.pro, automatically created when the package is installed, can conveniently be called from the personal GDL/IDL startup file.
This package is free software distributed under the terms of the GNU General Public License in the hope it will be useful. We would also be pleased to bring our expertise and collaborate to projects that would use the package.

Beside the official distribution of the package, you may wish to download other models or optional routines.

If ULySS was helpful to your research an acknowledgment would be appreciated:


The following articles describe or validate the method or present applications:

These other articles are also worth to mention since they describe similar approaches:


ULySS uses functions from the Astronomy User's Library whose installation is a pre-requisite.

Other libraries are also used, and for convenience the sources are included in the directory dep:

The development of ULySS started from an adaptation of the ppxf program of M. Cappellari, and we kept from this program the principle of optimizing the linear parameters within the Levenberg-Marquart iteration (in the user's function), as well as the penalization for the Gauss-Hermite coefficients of the LOSVD.

Several students contributed to the development and tests of these programs. The authors of ULySS acknowledge in particular Nicolas Bavouzet, Paul Blondé, Igor Chilingarian and Martin France.
The development benefited also from many tutorials and programming tips published on the web. In particular the Coyote's Guide to IDL Programming by David Fanning is a real gold mine for the IDL developers.

Contact: ulyss at obs.univ-lyon1.fr Last modified: Wednesday, 24-Feb-2016 11:23:34 CET.