The Stellar Spectral Synthesis Suite (S4, for short) is a suite of routines aimed to perform high-quality spectral synthetic fitting of massive stars observed spectra.

The spectral synthesis are done with Synspec based on atmospheric models calculated with Tlusty (Hubeny & Lanz et al.).

You can get the latest stable version here. Unpack it, go into the directory and then run the below commands. I recommend having pip installed. It makes installation and uninstallation a lot easier.

python setup.py build
pip install .

If you have any problems, check if all dependencies are installed. The dependencies can be seen below.

Also, if you want the bleeding edge version, you can clone the repository, and then run the above commands inside the S4 directory. If you are unfamiliar to git, just type:

git clone git@github.com:gabraganca/S4.git

• GNU Data Language greater than v0.9.6.
• gfortran is needed to compile Synspec and Rotins
• Numpy
• Matplotlib
• Scipy
• Astropy

If you use this software please cite as:

Bragança, Gustavo (2014): Stellar Spectral Synthesis Suite (S4). figshare. http://dx.doi.org/10.6084/m9.figshare.1051627