Extended likelihood fit with "RooBernstein"

Dear Experts,
I would like to use the class “RooBernstein”

With RooPolynomial, there is no need to specify the constant term
because it’s part of the normalization of the pdf
In other words, for a polynomial of degree n, one need to specify
only n parameters, and not n+1, because as I said the normalization
takes one degree of freedom

If I’m not mistaken, RooBernstein, needs n+1 coefficients for a polynomial of degree n
What about the normalization ?
How can I use “RooBernstein” within an extended likelihood fit ?

Many thanks,

  • Mauro.