Thus there is no required minimum count: there is only varying uncertainty, which can be well described.
We recommend that the Poisson timing analysis should be preferred over binning/best-fit approaches.
Additionally, we introduce a new notation to make it consistently clear that crater chronology model calibration errors are inseparable from stated crater model ages and their associated statistical errors.
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The predictions of crater chronology models have customarily been evaluated by dividing a crater population into discrete diameter intervals, plotting the crater density for each, and finding a best-fit model isochron, with the uncertainty in the procedure being assessed using 1/√ evaluation of a crater chronology model using Poisson statistics and Bayesian inference, expressing the result as a likelihood function with an intrinsic uncertainty.
We demonstrate that even in the case of no craters at all, a meaningful likelihood function can be obtained.
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