diff --git a/bilby/gw/detector/detectors/A1.interferometer b/bilby/gw/detector/detectors/A1.interferometer
index 2cfb564a3b36b4aa3e41d7e6623b8b74e98264cf..ca35cadd915353e766c9b065377dbf90107f7cdb 100644
--- a/bilby/gw/detector/detectors/A1.interferometer
+++ b/bilby/gw/detector/detectors/A1.interferometer
@@ -1,5 +1,5 @@
 # LIGO India Aundha at Aplus sensitvity.
-# LIGO-T2000158
+# Coordinates taken from https://dcc.ligo.org/LIGO-T2000158/public
 # https://dcc.ligo.org/LIGO-T2000012/public
 name = 'A1'
 power_spectral_density = PowerSpectralDensity(asd_file='Aplus_asd.txt')