Multi-band Extension of the Wideband Timing Technique
Abstract
The wideband timing technique enables the high-precision simultaneous estimation of pulsar Times of Arrival (ToAs) and Dispersion Measures (DMs) while effectively modeling frequency-dependent profile evolution. We present two novel independent methods that extend the standard wideband technique to handle simultaneous multi-band pulsar data incorporating profile evolution over a larger frequency span to estimate DMs and ToAs with enhanced precision. We implement the wideband likelihood using the libstempo python interface to perform wideband timing in the tempo2 framework. We present the application of these techniques to the dataset of fourteen millisecond pulsars observed simultaneously in Band 3 (300 - 500 MHz) and Band 5 (1260 - 1460 MHz) of the upgraded Giant Metrewave Radio Telescope (uGMRT) with a large band gap of 760 MHz as a part of the Indian Pulsar Timing Array (InPTA) campaign. We achieve increased ToA and DM precision and sub-microsecond root mean square post-fit timing residuals by combining simultaneous multi-band pulsar observations done in non-contiguous bands for the first time using our novel techniques.
Keywords
Cite
@article{arxiv.2304.13072,
title = {Multi-band Extension of the Wideband Timing Technique},
author = {Avinash Kumar Paladi and Churchil Dwivedi and Prerna Rana and Nobleson K and Abhimanyu Susobhanan and Bhal Chandra Joshi and Pratik Tarafdar and Debabrata Deb and Swetha Arumugam and A Gopakumar and M A Krishnakumar and Neelam Dhanda Batra and Jyotijwal Debnath and Fazal Kareem and Paramasivan Arumugam and Manjari Bagchi and Adarsh Bathula and Subhajit Dandapat and Shantanu Desai and Yashwant Gupta and Shinnosuke Hisano and Divyansh Kharbanda and Tomonosuke Kikunaga and Neel Kolhe and Yogesh Maan and P K Manoharan and Jaikhomba Singha and Aman Srivastava and Mayuresh Surnis and Keitaro Takahashi},
journal= {arXiv preprint arXiv:2304.13072},
year = {2023}
}
Comments
Published in MNRAS