Parkes observations for project P1423 semester 2026APRS_01

Pulsars are rapidly rotating, highly magnetized neutron stars whose radio emission provides unique probes of extreme gravity, plasma physics, and magnetospheric processes. Millisecond pulsars(MSPs) exhibit exceptional rotational stability, making them fundamental components of Pulsar Timing Arrays used to detect nanohertz gravitational waves, while also enabling precision tests of general relativity, binary evolution, and studies of the interstellar medium(ISM). Normal pulsars(NPs), on the other hand, serve as powerful laboratories for investigating neutron-star interiors, supernova remnants, magnetospheric physics, pulsar winds, and glitch phenomena.
Their polarization measurements are crucial, as they constrain emission geometry, magnetic-field configuration, and propagation effects such as Faraday rotation, while enabling robust determination of rotation measures(RM). For MSPs in particular, polarization studies improve timing-template fidelity and help correct frequency-dependent propagation effects that impact high-precision timing experiments.
GMRT low-frequency surveys have significantly expanded the known pulsar population, yet many GMRT-discovered pulsars lack broadband polarization measurements, leaving their emission geometry and frequency-dependent profile evolution poorly constrained. We propose 21 hours of observations with the Parkes 64-m telescope using UWL receiver to conduct a spectro-polarimetric study of six GMRT-discovered pulsars: three MSPs(J1207-5050, J1227-4853, J1646-2142) and three NPs(J0514-4407, J0418-4154, J0702-4956) to conduct a spectro-polarimetric study. These targets exhibit unresolved or contradictory polarization behaviour, including profile evolution, eclipse-driven interaction signatures, incomplete detections, or absence of full-Stokes information. The proposed wideband, high-sensitivity observations will provide robust RM measurements, broadband polarization profiles, and frequency-dependent beam mapping, filling key observational gaps and enhancing the scientific value of GMRT-discovered pulsars for magnetospheric studies and pulsar timing science.