diff --git a/test/data/crab.xml b/test/data/crab.xml
index 76fba92..9bb53bb 100644
--- a/test/data/crab.xml
+++ b/test/data/crab.xml
@@ -1,15 +1,15 @@
 <?xml version="1.0" standalone="no"?>
 <source_library title="source library">
-        <source name="Crab" type="PointSource">
-                <spectrum type="PowerLaw">
-                        <parameter scale="1e-07" name="Prefactor" min="1e-07" max="1000.0" value="1.73" free="1"/>
-                        <parameter scale="1.0" name="Index" min="-5.0" max="+5.0" value="-2.1" free="1"/>
-                        <parameter scale="1.0" name="Scale" min="10.0" max="1000000.0" value="100.0" free="0"/>
-                </spectrum>
-                <spatialModel type="SkyDirFunction">
-                        <parameter free="0" max="360" min="-360" name="RA" scale="1" value="83.6331" />
-                        <parameter free="0" max="90" min="-90" name="DEC" scale="1" value="22.0145" />
-                </spatialModel>
-        </source>
+  <source name="MAGIC Crab (Albert et al. 2008, ApJ, 674, 1037)" type="PointSource">
+    <spectrum type="PowerLaw">
+       <parameter scale="1e-16" name="Prefactor" min="1e-07" max="1000.0" value="5.7" free="1"/>
+       <parameter scale="1.0" name="Index" min="-5.0" max="+5.0" value="-2.48" free="1"/>
+       <parameter scale="1.0" name="Scale" min="10.0" max="1000000.0" value="300000.0" free="0"/>
+    </spectrum>
+    <spatialModel type="SkyDirFunction">
+      <parameter free="0" max="360" min="-360" name="RA" scale="1" value="83.6331" />
+      <parameter free="0" max="90" min="-90" name="DEC" scale="1" value="22.0145" />
+    </spatialModel>
+  </source>
 </source_library>