diff --git a/pyfstat/injection_helper_functions.py b/pyfstat/injection_helper_functions.py index 04d854fcfd96f72067f30cb8db4ce48041de5416..972115c88fe2bd6cdb7e5bb46fade17eed86f8e5 100644 --- a/pyfstat/injection_helper_functions.py +++ b/pyfstat/injection_helper_functions.py @@ -4,9 +4,13 @@ """ import numpy as np -from astropy import units as u -from astropy.coordinates import SkyCoord -from astropy.time import Time +import logging +try: + from astropy import units as u + from astropy.coordinates import SkyCoord + from astropy.time import Time +except ImportError: + logging.warning('Python module astropy not installed') # Assume Earth goes around Sun in a non-wobbling circle at constant speed; # Still take the zero longitude to be the Earth's position during the March