NAME:
plotEscapecurve
PURPOSE:
plot the escape velocity curve for this potential (in the z=0 plane for non-spherical potentials)
INPUT:
Pot - Potential or list of Potential instances
Rrange - Range in R to consider
grid - grid in R
savefilename - save to or restore from this savefile (pickle)
+bovy_plot.bovy_plot args and kwargs
OUTPUT:
plot to output device
HISTORY:
2010-08-08 - Written - Bovy (NYU)