Image Details
Caption: Figure 3.
Radio spectra of 4C +21.35 obtained by Effelsberg on 2009 January 24 (filled pentagons), 2009 May 1 (filled triangles), 2009 September 28 (open circles), 2010 May 2 (open pentagons), and 2011 April 29 (open triangles) from 2.64 to 43 GHz.
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