Comment on "Measurement of time of arrival in quantum mechanics"
  The analysis of the model quantum clocks proposed by Aharonov et al. [Phys. Rev. A 57 (1998) 4130 - quant-ph/9709031] requires considering evanescent components, previously ignored. We also clarify the meaning of the operational time of arrival distribution which had been investigated. 
A. D. Baute, I. L. Egusquiza, and J. G. Muga