Correct erroneous factors of 0.5 in supertranslation

moble · Sep 21, 2023 · 73fd205 · 73fd205
1 parent 1bc896a
commit 73fd205
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/scri/waveform_grid.py b/scri/waveform_grid.py
@@ -485,7 +485,7 @@ def from_modes(cls, w_modes, **kwargs):
         if beta != 0 or (supertranslation[1:] != 0).any():
             if w_modes.dataType == h:
                 # Note that SWSH_j_k will use s=-2 in this case, so it can be used in the tensordot correctly
-                supertranslation_deriv = 0.5 * sf.ethbar_GHP(sf.ethbar_GHP(supertranslation, 0, 0), -1, 0)
+                supertranslation_deriv = 2 * sf.ethbar_GHP(sf.ethbar_GHP(supertranslation, 0, 0), -1, 0)
                 supertranslation_deriv_values = np.tensordot(
                     supertranslation_deriv,
                     SWSH_j_k[:, :, : sf.LM_index(ell_max_supertranslation, ell_max_supertranslation, 0) + 1],
@@ -494,7 +494,7 @@ def from_modes(cls, w_modes, **kwargs):
                 fprm_i_j_k -= supertranslation_deriv_values[np.newaxis, :, :]
             elif w_modes.dataType == sigma:
                 # Note that SWSH_j_k will use s=+2 in this case, so it can be used in the tensordot correctly
-                supertranslation_deriv = 0.5 * sf.eth_GHP(sf.eth_GHP(supertranslation, 0, 0), 1, 0)
+                supertranslation_deriv = sf.eth_GHP(sf.eth_GHP(supertranslation, 0, 0), 1, 0)
                 supertranslation_deriv_values = np.tensordot(
                     supertranslation_deriv,
                     SWSH_j_k[:, :, : sf.LM_index(ell_max_supertranslation, ell_max_supertranslation, 0) + 1],