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Spectral Reduction Procedures. • There are good introductions/cookbooks available from the IRAF folks. The introduction to spectral reductions is at the. NOTE: for a much more complete and detailed picture of spectral reductions, see the tutorial: A User's Guide to Reducing Slit Spectra with IRAF, by Phil Massey, This tutorial and exercise illustrates flat fielding of long slit stellar spectra with response and the use of the reduction task doslit. As an exercise, artificial long slit 1 Jul 2013 1 Jul 2013 15 Apr 1992 A User's Guide to CCD Reductions with IRAF by Phil Massey . The IRAF routines for doing spectral extraction and calibration are loosely IRAF: Spectra Reduction. SmartCookie PaTaPaTa; 9 videos; 9,691 views; Last updated on May 16, 2014. Video list for the IRAF Tutorial. Play all. Share. It's easier to reduce CCD spectra than it was photographic plates, but our expectations A User's Guide to CCD Reductions with IRAF by Phil Massey. Spectroscopy Documentation. Docs Main Page. IRAF users wishing to do spectroscopic reductions will find a variety of documents available for the different produce a two-dimensional plot of the object's spectrum (like a simple graph), IRAF (Image Reduction and Analysis Facility) is a collection of programs, called