So I don't have a lot of noise theory background (or, really, any) and I'm having trouble with this. I'm hoping someone can expalin and/or point me to some good resources for looking these things up (I have access to a good academic library, so I should be able to get any not-too-obscure resource). I have a pair-breaking-based photon detector and an amp. I know the noise temperature for the amp, and I know the NEP for the detector and I need to compare them (to make sure I'm not going to be amp noise limited). Is there a reasonable way to convert between noise temp and NEP? Alternatively, in principle I know everything about the detector (I designed it), so I suppose I ought to be able to calculate the noise temperature of the detector, but I don't know how. What about if I imagine I am photon (shot) noise limited in the detector? (not quite true, but a reasonable simple case to start with). How would one calculate the noise temp of the detector then?