If we had a spectrum, we would know what it was - or more to the point, what it wasn't. I really, REALLY want a spectrum. Just one. Hmm . could it be simply a matter of deduction ? . connect the dots with Celani being specifically the only party being disallowed, his earlier Cincinnati group replication paper (which Rossi must have read), the range of common signatures that are possible for Celani to have identified with a portable NaI meter, even if allowed, and the fact that to produce power for $.01/kWhr, a natural emitter instead of an expensive isotope would need to be used. . how many possibilities are there to chose from ?