Discovery of five new pulsars in archival data

Abstract

Reprocessing of the Parkes Multibeam Pulsar Survey has resulted in the discovery of five previously unknown pulsars and several as-yet-unconfirmed candidates. PSR J0922-52 has a period of 9.68ms and a dispersion measure (DM) of 122.4pc cm-3. PSR J1147-66 has a period of 3.72ms and a DM of 133.8pc cm-3. PSR J1227-6208 has a period of 34.53ms, a DM of 362.6pc cm-3, is in a 6.7day binary orbit, and was independently detected in an ongoing high-resolution Parkes survey by Thornton etal. and also in independent processing by Einstein@Home volunteers. PSR J1546-59 has a period of 7.80ms and a DM of 168.3pc cm-3. PSR J1725-3853 is an isolated 4.79ms pulsar with a DM of 158.2pc cm-3. These pulsars were likely missed in earlier processing efforts due to the fact that they have both high DMs and short periods, and also due to the large number of candidates that needed to be looked through. These discoveries suggest that further pulsars are awaiting discovery in the multibeam survey data. © 2012. The American Astronomical Society. All rights reserved.