diff --git a/src/toolbox_scs/detectors/hrixs.py b/src/toolbox_scs/detectors/hrixs.py
index 60e4b5d20909989abacdb1f4749f10a855168d38..052f1c5955a3fb201830a9a7dfb199d680f649dd 100644
--- a/src/toolbox_scs/detectors/hrixs.py
+++ b/src/toolbox_scs/detectors/hrixs.py
@@ -504,8 +504,8 @@ class hRIXS:
         # -gauss_fit
         # start and stop are values of data.energy
         # that define the range of these operations
-        # RETURNS MAXIMUM POSITIONS AND data with 
-        # shifted spectra
+        # RETURNS LINE CENTER POSITIONS 
+        # (and in future perhaps shifted spectra)
         #********************************************
         searchinds = (data.energy >=start)*(data.energy <=stop)
         peak_posis = []
@@ -524,6 +524,7 @@ class hRIXS:
         #********************************************
         # Alignment based on autocorrelation
         # this is a relative alignment method
+        # where 1st readout defines the abs scale
         #********************************************
         elif method.lower() == 'autocorrelation':
             #********************************************
@@ -585,7 +586,7 @@ class hRIXS:
                     plt.plot(x,p.x[0]*Gauss(x,p.x[1],p.x[2]))
                     raise Exception('align_readouts(): can not fit a gaussian to the data.')
         else: 
-            raise Exception('align_readouts() did recognize the method.')
+            raise Exception('align_readouts() did not recognize the method.')
         return peak_posis