[BDXlist] Error on the estimate

[Andrea Celentano]

Dear Elton,
thanks for pointing out the error in the calculation.
I repeated it, results are on the wiki (today's meeting, I replaced the 
slides).

The result is the following: if we measure for 5 days with the beam, and 
for 30 days with no beam, assuming a 100-MeV threshold, and a cosmic 
rate of 2*10^-4 Hz, then we are sensitive to 20 counts (beam-related), 
i.e. ~ 4 counts / day.

Thanks again,

Bests,

Andrea