Shot noise in cl_sfb

[Sam Passaglia]

Hi,

In spectra.cl_sfb, shot noise is implemented in the sfb power spectrum as mat += sqrt(2) / pi * k1*self.W(l[i], k1, k1, evol=False) / self.surv.N

In the source paper, http://arxiv.org/pdf/1406.5989v2.pdf, the shot noise is described by equation (20).

A couple differences: 2->sqrt(2), \bar{n} = N / V -> N

What am I missing?

Best,
Sam