Figure 1
(a) The photon count thresholds determined by equation (1) with ∊ = 10−5. The SNR is defined as the ratio of the thresholds to the background estimates. (b) The cumulative probabilities Pb(K b × SNR) to measure a photon count K that is no larger than the thresholds b × SNR, defined by fixed values of SNR over a range of background estimates b. |