gistfile1.txt

In [16]: c = MapCoord.create({'skycoord': events.radec, 'energy': events.energy})                                                                                                   

In [17]: c.skycoord                                                                                                                                                                 
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-17-586f3db73d10> in <module>
----> 1 c.skycoord

~/work/code/gammapy/gammapy/maps/geom.py in skycoord(self)
    876     def skycoord(self):
    877         return SkyCoord(
--> 878             self.lon, self.lat, unit="deg", frame=coordsys_to_frame(self.coordsys)
    879         )
    880 

~/work/code/gammapy/gammapy/maps/geom.py in coordsys_to_frame(coordsys)
    176         return "galactic"
    177     else:
--> 178         raise ValueError(f"Unrecognized coordinate system: {coordsys!r}")
    179 
    180 

ValueError: Unrecognized coordinate system: None

In [18]: events.radec                                                                                                                                                               
Out[18]: 
<SkyCoord (ICRS): (ra, dec) in deg
    [(260.45935, -33.553337), (261.37506, -34.395004),
     (259.56973, -33.409416), ..., (266.0002 , -29.77206 ),
     (266.39728, -29.105953), (262.72217, -34.388405)]>