BurkertPotential.py: Potential with a Burkert density
NAME:
__init__
PURPOSE:
initialize a Burkert-density potential
INPUT:
amp - amplitude to be applied to the potential (default: 1)
a = scale radius
- normalize - if True, normalize such that vc(1.,0.)=1., or, if
- given as a number, such that the force is this fraction of the force necessary to make vc(1.,0.)=1.
OUTPUT:
(none)
HISTORY:
2013-04-10 - Written - Bovy (IAS)