Multi-band Extension of the Wideband Timing Technique

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 h...

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Veröffentlicht in:arXiv.org 2023-11
Hauptverfasser: Paladi, Avinash Kumar, Dwivedi, Churchil, Rana, Prerna, Nobleson, K, Susobhanan, Abhimanyu, Joshi, Bhal Chandra, Tarafdar, Pratik, Deb, Debabrata, Arumugam, Swetha, Gopakumar, A, Krishnakumar, M A, Neelam Dhanda Batra, Debnath, Jyotijwal, Fazal Kareem, Arumugam, Paramasivan, Bagchi, Manjari, Bathula, Adarsh, Dandapat, Subhajit, Desai, Shantanu, Gupta, Yashwant, Hisano, Shinnosuke, Kharbanda, Divyansh, Kikunaga, Tomonosuke, Kolhe, Neel, Maan, Yogesh, Manoharan, P K, Singha, Jaikhomba, Srivastava, Aman, Surnis, Mayuresh, Takahashi, Keitaro
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creator Paladi, Avinash Kumar
Dwivedi, Churchil
Rana, Prerna
Nobleson, K
Susobhanan, Abhimanyu
Joshi, Bhal Chandra
Tarafdar, Pratik
Deb, Debabrata
Arumugam, Swetha
Gopakumar, A
Krishnakumar, M A
Neelam Dhanda Batra
Debnath, Jyotijwal
Fazal Kareem
Arumugam, Paramasivan
Bagchi, Manjari
Bathula, Adarsh
Dandapat, Subhajit
Desai, Shantanu
Gupta, Yashwant
Hisano, Shinnosuke
Kharbanda, Divyansh
Kikunaga, Tomonosuke
Kolhe, Neel
Maan, Yogesh
Manoharan, P K
Singha, Jaikhomba
Srivastava, Aman
Surnis, Mayuresh
Takahashi, Keitaro
description 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.
doi_str_mv 10.48550/arxiv.2304.13072
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subjects Broadband
Evolution
Millisecond pulsars
Physics - High Energy Astrophysical Phenomena
Physics - Instrumentation and Methods for Astrophysics
Radio telescopes
title Multi-band Extension of the Wideband Timing Technique
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