The catalogue is a compilation of the principal observed parameters of pulsars, including positions, timing parameters, pulse widths, flux densities, proper motions, distances, and dispersion, rotation, and scattering measures. It also lists the orbital elements of binary pulsars, and some commonly used parameters derived from the basic measurements. The catalogue includes all published rotation-powered pulsars, including those detected only at high energies. It also includes Anomalous X-ray Pulsars (AXPs) and Soft Gamma-ray Repeaters (SGRs) for which coherent pulsations have been detected. However, it excludes accretion-powered pulsars such as Her X-1 and the recently discovered X-ray millisecond pulsars. PLEASE NOTE: If you make use of the ATNF Pulsar Catalogue in a publication, we request that you acknowledge the source of the information by referencing the paper: Manchester, R. N., Hobbs, G. B., Teoh, A. & Hobbs, M., Astron. J., 129, 1993-2006 (2005) (arXiv:astro-ph/0412641), which gives a full description of the catalogue, and by quoting the web address http://www.atnf.csiro.au/research/pulsar/psrcat. Where practicable, please list the original references for data used.