CXC Optics>Raytracing Chandra>SAOTrace>Source Definitions>Source Spectrum Functions>File Spectrum Function
[Last Change: 22 Feb 2012 (rev 3)]

file Spectrum Function

The file spectrum function generates a flat spectrum with the same flux at each energy. It takes a single argument, a table, with the following recognized named entries:

name type description default
name string name of spectrum instance  
file string name of file  
format string format of file. must be "rdb"  
emin string name of column containing minimum bin energy in keV, inclusive "emin"
emax string name of column containing maximum bin energy in keV, exclusive "emax"
flux string name of column containing flux "flux"
units string units of flux. one of: "ergs/s/cm2/kev", "kev/s/cm2/kev", or "photons/s/cm2"  
scale number factor by which to scale the spectrum 1.0
For example 

spectrum = file{ name = "spec for object 1",
                 file = "spectrum.rdb",
                 units = "ergs/s/cm2/kev",
                 scale = 0.5,
                 format = "rdb" }
 
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