- craftutils.observation.objects.FRB.dm_mw_ism_cum(max_distance: ~astropy.units.quantity.Quantity = <Quantity 20. kpc>, step_size: ~astropy.units.quantity.Quantity = <Quantity 0.1 kpc>, max_dm: ~astropy.units.quantity.Quantity = <Quantity 30. pc / cm3>, model: str = 'ne2001')