STSDAS: Space Telescope Science Data Analysis System Version 1.3.5, July 23, 1996. STSDAS is the software system for calibrating and analyzing data from the Hubble Space Telescope. The package is large and powerful, containing programs, called "tasks", to perform a wide range of functions supporting the entire data analysis process, from reading your tapes, through recalibration and analysis, to producing your final plots and images. STSDAS is built on top of the IRAF system developed at NOAO. This means that any task in IRAF can be used in STSDAS, To effectively exploit the power of STSDAS, you will need to learn the basics of IRAF. If you do not have been jet configured the IRAF environment see the IRAF section in this gopher area. To get help, use the on-line help facility. You need to type the "help" command which takes as an argument the task or package name about which you want help. To find the tasks use the "apropos" task to search the apropos database. STSDAS also uses the TABLES external package, which is a table I/O system that supports the transfer of tabular data from one application to another. There is a table manipulation tool kit that allows one to use tables as small relational databases. HST_PIPELINE package has also been installed. HST_PIPELINE is a package composed of the different versions of the HST instruments calibration tasks. The package is not used by any STSDAS or TABLES routines. The package tracks the changes of the calibration tasks by providing the different versions of the calibration routines, few users will need these tasks. SYNPHOT package simulates photometric data and spectra as they are observed with the Hubble Space Telescop (HST). Synphot tasks will: - Plot HST sensitivity curves and calibration target spectra. - Predict count rates for observations in any available HST instrument mode. - Compute the photometric calibration for any HST instrument mode. - Examine photometric transformation relationship among the various HST observing modes as well as conventional photometric systems, such as Johnson UBV. MULTIRED is a software package designed by O. Le Fevre (Le Fevre et al., 1995, ApJ, 455, 60) to process multi-slit spectra based on the "onedspec" and "twodspec" packages available in IRAF. MULTORED processes raw 2D spectra images produced by multi-slit spectrographs into a list of bias/flat/sky corrected 2D spectra and fully calibrated 1D spectra. It has been designed to operate in sequence on a list of slit positions (multi-slit data), and to process each raw 2D spectra associated with one given slit (multiple exposures). It is ideally suited for data produced by new generation multi-slit spectrographs like the MOS-SIS instrument at CFHT, but it can also be used to process standard long slit spectra, when used with only one (long) slit defined in the slit position file. The user is recommended to get familiar with the ONEDSPEC package and/or the interactive curve fitting capabilities provided in tools like IMAGES/FIT1D or ONEDSPEC/BACKGROUND before using MULTRED. However, at each interactive graphic stage, the user retains the general IRAF capability of on line help by typing <?> The STSDAS User's Manual is available in three different forms: HTML pages at the address: http://www.ira.inaf.it/ira-docs/calcolo.html Postscript files at the same web address Manuals in room 307 Contact Person: F.Tinarelli tinarelli@ira.inaf.it