diff --git a/ChangeLog b/ChangeLog
index 8375136..730d241 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -23,6 +23,7 @@
         Put likelihood computation in GObservation class
         Add broken power law spectral model
         Add Gaussian spectral model
+        Implement exact sky map pixel solid angle computation
         Rename the following classes:
         - GWcs => GSkyProjection
         - GWcslib => GWcs
diff --git a/NEWS b/NEWS
index b61d936..5aad6ac 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,4 @@
-New Features and Important Changes in GammaLib 00-08-00
+vNew Features and Important Changes in GammaLib 00-08-00
 
 Author(s) : Juergen Knoedlseder
 
@@ -560,7 +560,12 @@ The GSkyPixel class now supports 1D and 2D pixelisations, allowing
 a more generic usage of the class. Integer and double precision
 values can be assigned from and to GSkyPixel for 1D pixelisations.
 
-The GWcsAIT class has been added for Aitoff-Hammer projections.
+The GWcsAIT class has been added for Aitoff projections.
+
+The solid angle of sky map pixels are now computed using the spherical
+excess. This provides accurate solid angles even in case that the
+pixels are highly distorted, for example at the poles of the Aitoff
+projections.
 
 
 13. Support module