Timing of pulsars found in a deep Parkes multibeam survey

Abstract

We have carried out a sensitive radio pulsar survey along the northern Galactic plane (50° < l < 60° and |b| ≲ 2°) using the Parkes 20-cm multibeam system. We observed each position for 70 min on two separate epochs. Our analyses to date have so far resulted in the detection of 32 pulsars, of which 17 were previously unknown. Here, we summarize the observations and analysis and present the timing observations of 11 pulsars and discovery parameters for a further six pulsars. We also present a timing solution for the 166-ms bursting pulsar, PSR J1938+2213, previously discovered during an Arecibo drift-scan survey. Our survey data for this pulsar show that the emission can be described by a steady pulse component with bursting emission, which lasts for typically 20–25 pulse periods, superposed. Other new discoveries are the young 80.1-ms pulsar PSR J1935+2025 which exhibits a significant amount of unmodelled low-frequency noise in its timing residuals and the 4.2-ms pulsar PSR J1935+1726 which is in a low-mass binary system with a 90.7-d circular orbit.