Evidence for profile changes in PSR J1713+0747 using the uGMRT
Abstract
PSR J1713+0747 is one of the most precisely timed pulsars in the international pulsar timing array experiment. This pulsar showed an abrupt profile shape change between April 16, 2021 (MJD 59320) and April 17, 2021 (MJD 59321). In this paper, we report the results from multi-frequency observations of this pulsar carried out with the upgraded Giant Metrewave Radio Telescope (uGMRT) before and after the event. We demonstrate the profile change seen in Band 5 (1260 MHz - 1460 MHz) and Band 3 (300 MHz - 500 MHz). The timing analysis of this pulsar shows a disturbance accompanying this profile change followed by a recovery with a timescale of days. Our data suggest that a model with chromatic index as a free parameter is preferred over models with combinations of achromaticity with DM bump or scattering bump. We determine the frequency dependence to be .
Keywords
Cite
@article{arxiv.2107.04607,
title = {Evidence for profile changes in PSR J1713+0747 using the uGMRT},
author = {Jaikhomba Singha and Mayuresh P Surnis and Bhal Chandra Joshi and Pratik Tarafdar and Prerna Rana and Abhimanyu Susobhanan and Raghav Girgaonkar and Neel Kolhe and Nikita Agarwal and Shantanu Desai and T Prabu and Adarsh Bathula and Subhajit Dandapat and Lankeswar Dey and Shinnosuke Hisano and Ryo Kato and Divyansh Kharbanda and Tomonosuke Kikunaga and Piyush Marmat and Sai Chaitanya Susarla and Manjari Bagchi and Neelam Dhanda Batra and Arpita Choudhury and A Gopakumar and Yashwant Gupta and M A Krishnakumar and Yogesh Maan and P K Manoharan and K Nobleson and Arul Pandian and Dhruv Pathak and Keitaro Takahashi},
journal= {arXiv preprint arXiv:2107.04607},
year = {2021}
}
Comments
Accepted for publication in MNRAS-Letters