4.5	Accessing IRAF, PyRAF, and STSDAS Software

4.5.1 Accessing the Synphot Data Set

IRAF, PyRAF, and STSDAS are provided free of charge to the astronomical community. You can down load the IRAF software from http://iraf.noao.edu/. Instructions on how to download and install PyRAF can be found online:

http://www.stsci.edu/resources/software_hardware/pyraf/stsci_python/current/download

You must have IRAF or PyRAF installed on your system in order to run STSDAS. Detailed information about downloading and installing STSDAS is found at the following page:

http://www.stsci.edu/resources/software_hardware/stsdas/download

If you have any problems getting and installing STSDAS, TABLES, PyRAF, or any other STScI packages or data described in this handbook, please contact the Help Desk by sending e-mail to: help@stsci.edu.

When you download STSDAS, you should also download the TABLES ­package. TABLES must be installed prior to STSDAS. You must have IRAF or PyRAF installed on your system in order to install TABLES and STSDAS.

Bug fixes and new versions of this package in the process of being tested can be downloaded as the IRAFX environment from:

http://stsdas.stsci.edu/irafx/

These pre-release versions are updated weekly to include new code and bug fixes which have not been extensively tested or verified for accuracy by the Institute. They also require a very different installation procedure and can be installed without root access, but are only provided as binaries for the Mac OSX Leopard and Linux Red Hat Enterprise 4 operating systems.

4.5.1

Accessing the Synphot Data Set

This handbook sometimes refers to the synphot data set, which must be available in order to run tasks in the STSDAS synphot package (see Section 3.4.4). The package is included with the STSDAS installation, but the corresponding data set must be retrieved and installed separately. Instructions on how to obtain and install the synphot data set can be found at:

http://www.stsci.edu/resources/software_hardware/stsdas/synphot

Users should note that there are two separate synphot-related documents:

•	the Synphot User’s Guide, which includes instructions on how to use the tasks in the package, and

•	the Synphot Data User’s Guide, which includes instructions on how to set the different HST keywords.