SGRs and AXPs: Evidence for Delayed Amplification of Magnetic Field after Neutron Star Formation?
(a) shows the cumulative probability distribution for ages of SNRs associated with AXPs/SGRs (diamonds). Also shown is the expected probability distributions for the cases of constant birth rate (solid line) and of constant age (dashed line). (b) shows the cumulative probability distribution for spin-down ages of AXPs/SGRs (diamonds) and expected probability distributions for constant birth rate (solid line) and of constant age (dashed line) models. The ages for the constant age models were chosen to give minimum KS statistic (and lowest rejection probability) for both SNR and spin-down ages.
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