The HSTCAL package consists entirely of C libraries and the C code for CALACS, CALSTIS, and CALWF3.
The latest HSTCAL release is version 1.5. HSTCAL is included in the Ureka distribution. Source code and stand-alone binaries are also available.
HSTCAL in Ureka
Ureka is a self-contained software bundle that includes Python 2.7.5, IRAF 2.16, and most software developed by the Science Software Branch, including HSTCAL.
You can find more information about Ureka at http://ssb.stsci.edu/ureka.
If you do not want to install Ureka, you can download the HSTCAL binaries and use them directly.
tar zxf hstcal-1.5.linux.tar.gz
For Intel Macintosh (OSX 10.5 / Leopard or later):
tar zxf hstcal-1.5.mac.tar.gz
You have to place the HSTCAL bin directory on your PATH so that the binaries can be found.
set path = ( ~/hstcal-1.5/bin $path )
To install HSTCAL from source, you must have a Python installation to control the code compilation, as well as a C compiler.
Download the source code and follow the instructions in INSTALL to compile HSTCAL.