determineDistortion(): set domains to [0, npix-1] along each axis ins…

…tead of [0, npix]
GeminiDRSoftware · Nov 10, 2022 · a409f6a · a409f6a
1 parent de028a8
commit a409f6a
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/geminidr/core/primitives_spect.py b/geminidr/core/primitives_spect.py
@@ -1097,8 +1097,8 @@ def determineDistortion(self, adinputs=None, **params):
                 # of the data, so it could be used as a gWCS object
                 m_init = models.Chebyshev2D(x_degree=orders[1 - dispaxis],
                                             y_degree=orders[dispaxis],
-                                            x_domain=[0, ext.shape[1]],
-                                            y_domain=[0, ext.shape[0]])
+                                            x_domain=[0, ext.shape[1]-1],
+                                            y_domain=[0, ext.shape[0]-1])
                 # Rather than fit to the reference coords, let's fit to the
                 # *shift* we want in the spectral direction and then add a
                 # linear term which will produce the desired model. This