Access to the FTP site for SPECTRUM

The UNIX/Linux version of SPECTRUM may be obtained at the following link:  The latest version of SPECTRUM is v2.73,  August, 2006. 
SPECTRUM binaries which will run on Windows may also be obtained from this link.

For UNIX/LINUX, download spectrum273.tar.gz and at least one of the line list files.
For Windows, download spectrum266.zip, spectrum101.zip and at least one of the line list files (v2.73 will be available in Windows binaries
soon).

Note that v2.73 is a major upgrade for SPECTRUM.  Files associated with v2.73, such as atom.dat and stdatom.dat are not compatible with versions earlier than v2.72.

Note the availability of the beta version 2.75 below:

SPECTRUM download

If the above site is down, or is too slow, try the following mirror site:

PM Mirror site:  SPECTRUM download

A new Windows GUI for SPECTRUM is available, and is contained in the file spectrum101.zip.   A Tcl/Tk GUI for SPECTRUM is included in the distribution spectrum266.tar.gz.


Read the  Notes on Windows  to learn how to install the Windows binaries.

If you have any difficulties compiling  or running SPECTRUM on your  computing platform, please do not hesitate to contact me at grayro@appstate.edu .


May 6, 2008: Beta Test Version SPECTRUM v2.75 now available via the download sites above.

This beta test version, already thoroughly tested, is a major upgrade for SPECTRUM.  It includes updates on continuous opacity sources, on the calculation of the hydrogen lines (including significant improvements in the calculation of the hydrogen lines for the late-type stars, and
also the calculation of Lyman-alpha H2 satellites), the addition of the ability to calculate spectra for the H2 molecule, and added versatility
in the spectral-line broadening calculations.  SPECTRUM v2.75 also comes with new, detailed documentation.  Note -- do not use old versions
of atom.dat or stdatom.dat with v2.75 due to compatibility problems.   Version 2.75 will replace 2.73 as the stable version within a few
weeks.  A windows version of 2.75 will be released in a few days.