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This paper presents the discovery and timing parameters for five millisecondpulsars (MSPs), four in binary systems with probable white dwarf companions andone isolated, found in ongoing processing of the High Time Resolution UniversePulsar Survey (HTRU). We also present high quality polarimetric data on four ofthem. These further discoveries confirm the high potential of our survey infinding pulsars with very short spin periods. At least two of these five MSPsare excellent candidates to be included in the Pulsar Timing Array projects.Thanks to the wealth of MSP discoveries in the HTRU survey, we revisit thequestion of whether the luminosity distributions of isolated and binary MSPsare different. Using the Cordes and Lazio distance model and our new andcatalogue flux density measurements, we find that 41 of the 42 most luminousMSPs in the Galactic disk are in binaries and a statistical analysis suggeststhat the luminosity functions differ with 99.9% significance. We conclude thatthe formation process that leads to solitary MSPs affects their luminosities,despite their period and period derivatives being similar to those of pulsarsin binary systems.

monthly notices of the royal astronomical society

The High Time Resolution Universe Pulsar Survey - VII: discovery of five  millisecond pulsars and the different luminosity properties of binary and  isolated recycled pulsars