BS losses are only single passed in PRC for calculation of power recycling gain, shouldn't they be double passed?
In ifo/noises.py line 105:
`prfactor = t5**2 / (1 + r5 * rarm * sqrt(1-bsloss))**2`
I'm thinking that the BS is double passed in the PRC, so this should be:
`prfactor = t5**2 / (1 + r5 * rarm * (1-bsloss))**2`
or
`prfactor = t5**2 / (1 + r5 * rarm * sqrt(1-2*bsloss))**2`
Is that right? This may be inconsequential for the IFO models gwinc has because the BS losses are small, but we are thinking that we need to use larger PRC losses if we want to make a model to match H1.