The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey—II. Survey status, pulsar census, and first pulsar discoveries

• DOI: 10.1017/pasa.2023.18
• Publication Date: 2023-04-11T12:36:55Z
• Authors: N. D. R. Bhat; N. A. Swainston; S. J. McSweeney; M. Xue; B.W. Meyers; S. Kudale; S. Dai; S. E. Tremblay; W. van Straten; R. M. Shannon; K. R. Smith; M. Sokolowski; S. M. Ord; G. Sleap; A. Williams; P. J. Hancock; R. Lange; J. Tocknell; M. Johnston-Hollitt; D. L. Kaplan; S. J. Tingay; M. Walker
• Keywords: High Energy Astrophysical Phenomena (astro-ph.HE); XXXXXX - Unknown; 0103 physical sciences; FOS: Physical sciences; Astrophysics - High Energy Astrophysical Phenomena; Astrophysics - Instrumentation and Methods for Astrophysics; 310; 01 natural sciences; Instrumentation and Methods for Astrophysics (astro-ph.IM)

Abstract In Paper I, we presented an overview of the Southern-sky MWA Rapid Two-metre (SMART) survey, including survey design and search pipeline. While combination MWA’s large field-of-view voltage capture system brings a speed ${\sim} 450\, {\textrm{deg}}^{2}\,\textrm{h}^{-1}$ , progression relies on availability compact configuration Phase II array. Over past few years, by taking advantage multiple windows opportunity when was available, have advanced to 75% planned sky coverage. To date, about 10% data collected thus far been processed for first-pass search, where 10 min observation is dispersion measures out 250 ${\textrm{pc cm}}^{-3}$ realise shallow that largely sensitive long-period pulsars. The ongoing analysis has led two new pulsar discoveries, as well independent discovery rediscovery previously incorrectly characterised pulsar, all from 3\% $ which candidate scrutiny completed. this sequel describe strategies further detailed follow-up improved localisation convergence timing solution, illustrate them using example discoveries. processing also re-detection 120 pulsars in SMART observing band, bringing total number detected date with 180, these are used assess sensitivity current pipelines. second-pass (deep survey) expected yield three-fold increase pulsars, substantial improvement millisecond adopting optimal de-dispersion plans. will complement highly successful Parkes High Time Resolution Universe at 1.2–1.5 GHz, inform future efforts such those low-frequency Square Kilometre Array (SKA-Low).