red

command list , class list , introduction .

 RED N1 N2 N3 E(B-V) R -- Dereddens (or reddens) a series of spectra

 Parameters
            N1, N2 -- Range of spectra to process
            N3     -- First output slot
            E(B-V) -- Colour excess. 
            R      -- Ratio of Extinction at V Av/E(B-V). Use R=3.1 if you
                      need continuity at 5464A (transition between two of
                      Howarth's fits).

 Uses fits from Seaton 1979 MN 187, 73p and Howarth 1983 203 301
 This is for typical galactic extinction and LMC is quite different.

This command belongs to the classes: manipulation .

Tom Marsh, trm@astro.soton.ac.uk, Tue Oct 27 08:56:34 1998 .