Chapter 3:
Analyzing HST Data

3.1 Analysis Options for HST Data

3.1.1 IRAF/STSDAS

3.1.2 PyRAF

3.1.3 Python

3.1.4 Interactive Data Language (IDL)

3.1.5 Fortran and C

3.1.6 Java

3.2 Navigating STSDAS

3.2.1 STSDAS Structure

3.2.2 Packages of General Interest

3.3 Displaying HST Images

3.3.1 The Display Task

3.3.2 Working with Image Sections

3.4 Analyzing HST Images

3.4.1 Basic Astrometry

3.4.2 Examining and Manipulating Image Data

3.4.3 Working with FITS Imsets

3.4.4 Photometry

3.4.5 Combining Dithered HST Datasets with MultiDrizzle

3.5 Displaying HST Spectra

3.5.1 Specview

3.5.2 COS and STIS Spectra

3.5.3 FOS and GHRS Spectra

3.5.4 Producing Hardcopy

3.6 Analyzing HST Spectra

3.6.1 Preparing COS and STIS Spectra for Analysis in IRAF or PyRAF and STSDAS

3.6.2 Preparing FOS and GHRS Data

3.6.3 Photometry

3.6.4 General Tasks for Spectra

3.6.5 STSDAS Fitting Package

3.6.6 Specfit

3.7 References

3.7.1 Available from STScI

3.7.2 Available from NOAO

3.7.3 Other References Cited in This Chapter

Chapters 2 and 3 assume that the reader is familiar with basic IRAF/STSDAS syntax. If terms such as login.cl, epar, lpar, and apropos are not familiar to the reader, we recommend skipping to the IRAF Primer included in Chapter 4.