diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..eeb514cf9e3e449cb3966636ecd4067ce0afbcfb
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+__pycache__
+.ipynb_checkpoints
diff --git a/birefringence-waveform/__init__.py b/birefringence-waveform/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..287ff9f759c477ab0aa43620d7cd937bc39e7459
--- /dev/null
+++ b/birefringence-waveform/__init__.py
@@ -0,0 +1 @@
+import .birefringence_waveform
diff --git a/birefringence-waveform/birefringence_waveform.py b/birefringence-waveform/birefringence_waveform.py
index b9d6e9243ead4fa7096f850694b99372261b0473..bc2bd7dd956d8935de923cbcd64617961cd405a8 100644
--- a/birefringence-waveform/birefringence_waveform.py
+++ b/birefringence-waveform/birefringence_waveform.py
@@ -18,4 +18,4 @@ def IMRPhenomParity(parity_Amu, **kwds):
     return hp_parity, hc_parity
 
 
-pycbc.waveform.add_custom_waveform('IMRPhenomParity', IMRPhenomParity, 'frequency', force=True)
\ No newline at end of file
+pycbc.waveform.add_custom_waveform('IMRPhenomParity', IMRPhenomParity, 'frequency', force=True)
diff --git a/birefringence-waveform/waveform.py b/birefringence-waveform/waveform.py
deleted file mode 100644
index 41ec79b79c4fbb9fc8dd995beaea857fed10f6c8..0000000000000000000000000000000000000000
--- a/birefringence-waveform/waveform.py
+++ /dev/null
@@ -1,17 +0,0 @@
-from pycbc.waveform import get_fd_waveform
-import numpy as np
-import pycbc.conversions
-import lal
-
-def IMRPhenomParity(parity_Amu, **kwds):
-
-    if 'approximant' in kwds:
-        kwds.pop("approximant")
-    hp, hc = get_fd_waveform(approximant="IMRPhenomXPHM", **kwds)
-
-    temp =  parity_Amu * 1e9 * lal.QE_SI * lal.PI * lal.PI / lal.H0_SI
-
-    hp_parity = hp + hc * temp * hp.sample_frequencies **2
-    hc_parity = hc - hp * temp * hp.sample_frequencies **2    
-
-    return hp_parity, hc_parity
diff --git a/birefringence-waveform/plot_waveform.ipynb b/utils/plot_waveform.ipynb
similarity index 100%
rename from birefringence-waveform/plot_waveform.ipynb
rename to utils/plot_waveform.ipynb
diff --git a/birefringence-waveform/printwfname.py b/utils/printwfname.py
similarity index 100%
rename from birefringence-waveform/printwfname.py
rename to utils/printwfname.py