NAME:
skewvT
PURPOSE:
calculate skew in vT at R by marginalizing over velocity
INPUT:
R - radius at which to calculate <vR> (/ro)
OPTIONAL INPUT:
nsigma - number of sigma to integrate the velocities over
KEYWORDS:
romberg - if True, use a romberg integrator (default: False)
OUTPUT:
skewvT
HISTORY:
2011-12-07 - Written - Bovy (NYU)
