Add credit for crefin data.

LICENSE

+The contents of the files in the "data" directory have been obtained from the
+scientific literature and are the intelectual property of their respective
+authors. If you are the author of the contents of one of those files and feel
+you have not been properly credited or have any other concern, please contact
+mglatzle@mpa-garching.mpg.de.
+
+All other files in this repository are distributed under GPLv3 as detailed
+below.
+
+
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 

cosmic_dustbox/crefin.py

@@ -146,9 +146,10 @@ class SGPAHCrefin(Crefin):
     @classmethod
     def parseCrefinFile(cls, path):
         with open(path) as f:
-            data = _np.loadtxt(f, skiprows=5)
+            data = _np.loadtxt(f, skiprows=6)
             f.seek(0)
-            next(f)
+            # skip tow lines
+            [next(f) for i in range(2)]
             size = float(f.readline().split('=')[0])
         return size, data
 

cosmic_dustbox/data/crefin/callindex.out_CpaD03_0.01

+ Downloaded from B. Draine's website at https://www.astro.princeton.edu/~draine/dust/dust.diel.html
  ICOMP=18: Draine 2003 graphite E parallel to c    
   0.0100 = grain radius (micron)
    20.00 = grain temperature (K)

cosmic_dustbox/data/crefin/callindex.out_CpaD03_0.10

+ Downloaded from B. Draine's website at https://www.astro.princeton.edu/~draine/dust/dust.diel.html
  ICOMP=18: Draine 2003 graphite E parallel to c    
   0.1000 = grain radius (micron)
    20.00 = grain temperature (K)

cosmic_dustbox/data/crefin/callindex.out_CpeD03_0.01

+ Downloaded from B. Draine's website at https://www.astro.princeton.edu/~draine/dust/dust.diel.html
  ICOMP=19: Draine 2003 graphite E perp. c          
   0.0100 = grain radius (micron)
    20.00 = grain temperature (K)

cosmic_dustbox/data/crefin/callindex.out_CpeD03_0.10

+ Downloaded from B. Draine's website at https://www.astro.princeton.edu/~draine/dust/dust.diel.html
  ICOMP=19: Draine 2003 graphite E perp. c          
   0.1000 = grain radius (micron)
    20.00 = grain temperature (K)

cosmic_dustbox/data/crefin/callindex.out_silD03

+ Downloaded from B. Draine's website at https://www.astro.princeton.edu/~draine/dust/dust.diel.html
  ICOMP=11: Draine 2003 astrosilicate               
   0.1000 = grain radius (micron)
    20.00 = grain temperature (K)