Index: /fact/tools/pyscripts/pyfact/pyfact.py
===================================================================
--- /fact/tools/pyscripts/pyfact/pyfact.py	(revision 13154)
+++ /fact/tools/pyscripts/pyfact/pyfact.py	(revision 13155)
@@ -165,5 +165,5 @@
             # rotate the pixel baseline mean to the Data startCell
             blm_pixel = np.roll( blm[pixel,:], -self.start_cells[pixel] )
-            tom_pixel = np.roll( tom[pixel,:], -self.start_cells[pixel] )
+            tom_pixel =  tom[pixel,:]
             gm_pixel = np.roll( gm[pixel,:], -self.start_cells[pixel] )
             acal_data[pixel,:] -= blm_pixel[0:self.nroi]