Update README.md

README.md

@@ -15,14 +15,15 @@
 
 - [ ] Yifan, Alex: Postprocessing
 
+Manuscript:
+    https://www.overleaf.com/read/bhgnpmgrjzsg
+    
 References: 
 - [O1 and O2 testing birefringence/parity violation of GW](https://arxiv.org/pdf/2002.05668.pdf)
 - [LVC's testingGR paper with GWTC2](https://arxiv.org/abs/2010.14529)
 
 
 
-
-
 #### Other ideas: 
 - [ ] Parametrized Post-Einstein with IMRPhenomXPHM
 - [ ] Multiple events' results correlation