... modulation

Appendix A is only available in electronic form at http://www.aanda.org.

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...

Table 2 is also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/469/607

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... author

The thesis of P. Weltevrede is online available via the following URL: http://dare.uva.nl/en/record/217315

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... catalogued

http://www.atnf.csiro.au/research/pulsar/psrcat/

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... package

http://pulsar.princeton.edu/tempo/

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... Paper I

The normalization of the probability functions in Fig. 11 of Paper I is incorrect, but the values in Table 1 and therefore all the conclusions of Paper I are unaltered.

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