The GMRT High Resolution Southern Sky Survey for pulsars and transients -II. New discoveries, timing and polarization properties

TL;DR

This paper reports new pulsar discoveries, detailed timing solutions, and polarization measurements from the GMRT High Resolution Southern Sky survey, expanding knowledge of pulsar properties at low radio frequencies in a specific sky region.

Contribution

It presents three new pulsar discoveries, provides timing solutions for three previously found pulsars, and offers polarization data, enhancing understanding of pulsar characteristics at 322 MHz.

Findings

Discovered 3 new pulsars in the survey.

Provided timing solutions for 3 known pulsars.

Reported gamma-ray emission from PSR J0514-4408.

Abstract

We have been conducting the GMRT High Resolution Southern Sky (GHRSS) survey for the last four years and have discovered 18 pulsars to date. The GHRSS survey is an off-Galactic-plane survey at 322 MHz in a region of the sky (declination range -40 degrees to -54 degrees) complementary to other ongoing low-frequency surveys. In this paper we report the discovery of three pulsars, PSRs J1239-48, J1516-43 and J1726-52. We also present timing solutions for three pulsars previously discovered with the GHRSS survey: PSR J2144-5237, a millisecond pulsar with a period P=5 ms in a 10 day orbit around a < 0.18 Msun companion; PSR J1516-43, a mildly recycled P=36 ms pulsar in a 228 day orbit with a companion of mass ~0.4 Msun; and the P=320 ms PSR J0514-4408 which we show is a source of pulsed $\gamma$-ray emission. We also report radio polarimetric observations of three of the GHRSS discoveries, PSRs J0418-4154, J0514-4408 and J2144-5237.