...1,

Now at CERN, Geneva, Switzerland.

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...

Now at School of Physics & Astronomy, University of Leeds, Leeds LS2 9JT, UK.

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...

Now at Purdue University, Department of Physics, 525 Northwestern Avenue, West Lafayette, IN 47907-2036, USA.

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... O. Reimer

Now at Stanford University, HEPL & KIPAC, Stanford, CA 94305-4085, USA.

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...

Now at School of Chemistry & Physics, University of Adelaide, Adelaide 5005, Australia.

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... France

UMR 7164 (CNRS, Université Paris VII, CEA, Observatoire de Paris).

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...$\alpha = 1.1$

Note that pure ON runs with wobble offsets < $0.7\hbox {$^\circ $ }$ are included in Data set I (cf. Table 1) and hence $\alpha >1$.

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