The uGMRT observations of three new GPS pulsars

TL;DR

This study uses the uGMRT to observe three pulsars, revealing their gigahertz-peaked spectra and demonstrating that wide-band observations enhance spectral analysis accuracy.

Contribution

The paper provides detailed spectral measurements of three pulsars, identifying them as gigahertz-peaked spectrum pulsars and emphasizing the importance of wide-band observations for spectral modeling.

Findings

Spectral turnovers at 620, 640, and 650 MHz for the three pulsars.

Wide-band observations improve spectral estimation accuracy.

No current evidence links these pulsars to supernova remnants or pulsar wind nebulae.

Abstract

We report the detailed spectral measurements over a wide frequency range of three pulsars: J1741-3016, J1757-2223 and J1845-0743, using the Giant Metrewave Radio Telescope, which allowed us to identify them as a new gigahertz-peaked spectra pulsars. Our results indicate that their spectra show turnovers at frequencies of 620 MHz, 640 MHz and 650 MHz, respectively. Our analysis proves that wide-band observations improve the estimation of the spectral nature using a free-free thermal absorption model and thus allow a more accurate approximation of the maximum energy in the spectrum. While there is no evidence as of yet that these objects are associated with a supernova remnant or pulsar wind nebula, they are good targets for looking for interesting environments in the future, more sensitive sky surveys.