I am just getting back to this - I don't see anything since John's email on Friday morning - which I mostly agree with. If the hypothesis is that there is a real signal plus a systematic in Rx1 which cancels it then a concrete test plan is as follows: - Scale the r=0.1 sims to r=0.3 and add to the signal+noise for all receivers - In the Rx1 sig+noise sims scale the noise up until the B2xB2-B2xRx1 spectral jack is not unlikely (i.e. the systematic is being modelled as just extra noise). - Look if the Rx1xRx1 auto spectrum then shows a detection - which it very well may because it will be debiased with the *unscaled* noise which we believe to actually be present in Rx1. Walt/anyone: are you working on this or something similar? If not I will get on it tomorrow morning. Clem -- ********************************************************************** Clem Pryke - Associate Professor - Physics University of Minnesota, Room 313 Tate, 116 Church Street S.E. Minneapolis, MN, 55455 Tel: 612-624-7578 Fax: 612-624-4578 email: pryke(a)physics.umn.edu **********************************************************************