diff --git a/docs/source/developer/images/SpectralQty.pdf b/docs/source/developer/images/SpectralQty.pdf
index 45b9b66..89a6419 100644
Binary files a/docs/source/developer/images/SpectralQty.pdf and b/docs/source/developer/images/SpectralQty.pdf differ
diff --git a/esbo_etc/classes/SpectralQty.py b/esbo_etc/classes/SpectralQty.py
index 698bd7b..bc0549e 100644
--- a/esbo_etc/classes/SpectralQty.py
+++ b/esbo_etc/classes/SpectralQty.py
@@ -182,7 +182,7 @@ class SpectralQty:
 
         Returns
         -------
-        sum : SpectralQty
+        diff : SpectralQty
             The difference of both objects
         """
         # Subtrahend is of type int or float, use same unit
@@ -228,7 +228,7 @@ class SpectralQty:
 
         Returns
         -------
-        sum : SpectralQty
+        prod : SpectralQty
             The product of both objects
         """
         # Factor is of type int, float or Quantity, just multiply
@@ -270,7 +270,7 @@ class SpectralQty:
 
         Returns
         -------
-        sum : SpectralQty
+        quot : SpectralQty
             The quotient of both objects
         """
         # Factor is of type int, float or Quantity, just multiply
@@ -297,6 +297,24 @@ class SpectralQty:
             else:
                 logger.error("Units are not matching for division.")
 
+    def __pow__(self, other: Union[int, float]) -> "SpectralQty":
+        """
+        Raise to spectral quantity to the given power.
+
+        Parameters
+        ----------
+        other : Union[int, float]
+            The exponent for this object.
+
+        Returns
+        -------
+        prod : SpectralQty
+            The spectral quantity raised to the given power.
+        """
+        # Factor is of type int, float or Quantity, just multiply
+        if isinstance(other, int) or isinstance(other, float):
+            return SpectralQty(self.wl, self.qty ** other)
+
     def rebin(self, wl: u.Quantity) -> "SpectralQty":
         """
         Resample the spectral quantity sqty(wl) over the new grid wl, rebinning if necessary, otherwise interpolates.