Add sanity checks on RA and DEC

pycbc/tmpltbank/sky_grid.py

@@ -34,6 +34,10 @@ def __init__(self, ra, dec, detectors, ref_gps_time):
         # We store the points in a 2D array internally, first dimension runs
         # over the list of points, second dimension is RA/dec.
         # Question: should we use Astropy sky positions instead?
+        if (self.ra < 0).any() or (self.ra > 2 * np.pi).any():
+            raise ValueError('RA must be in the range [0,2π]')
+        if (self.dec < -np.pi/2).any() or (ra > np.pi/2).any():
+            raise ValueError('DEC must be in the range [-π/2, π/2]')
         self.positions = np.vstack([ra, dec]).T
         self.detectors = sorted(detectors)
         self.ref_gps_time = ref_gps_time