Revisiting wideband pulsar timing measurements

Abhimanyu Susobhanan; Avinash Kumar Paladi; Réka Desmecht; Amarnath; Manjari Bagchi; Manoneeta Chakraborty; Shaswata Chowdhury; Suruj Jyoti Das; Debabrata Deb; Shantanu Desai; Churchil Dwivedi; Himanshu Grover; Jibin Jose; Bhal Chandra Joshi; Shubham Kala; Fazal Kareem; Kuldeep Meena; Sushovan Mondal; K Nobleson; Arul Pandian B; Kaustubh Rai; Adya Shukla; Manpreet Singh; Aman Srivastava; Mayuresh Surnis; Hemanga Tahbildar; Keitaro Takahashi; Pratik Tarafdar; Kunjal Vara; Vaishnavi Vyasraj; Zenia Zuraiq

doi:10.1093/mnras/stag444

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arXiv · 2512.01288

Revisiting wideband pulsar timing measurements

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Abstract

In the wideband paradigm of pulsar timing, the time of arrival of a pulsar pulse is measured simultaneously with the corresponding dispersion measure from a frequency-resolved integrated pulse profile. We present a new method for performing wideband measurements that rigorously accounts for measurement noise. We demonstrate this method using observations of PSR J2124$-$3358 made as part of the Indian Pulsar Timing Array experiment using the upgraded Giant Metre-wave Radio Telescope, and show that our method produces more realistic measurement uncertainty estimates compared to the existing wideband measurement method.

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Abhimanyu Susobhanan, Avinash Kumar Paladi, Réka Desmecht, Amarnath, Manjari Bagchi, Manoneeta Chakraborty, Shaswata Chowdhury, Suruj Jyoti Das, Debabrata Deb, Shantanu Desai, Churchil Dwivedi, Himanshu Grover, Jibin Jose, Bhal Chandra Joshi, Shubham Kala, Fazal Kareem, Kuldeep Meena, Sushovan Mondal, K Nobleson, Arul Pandian B, Kaustubh Rai, Adya Shukla, Manpreet Singh, Aman Srivastava, Mayuresh Surnis, Hemanga Tahbildar, Keitaro Takahashi, Pratik Tarafdar, Kunjal Vara, Vaishnavi Vyasraj, Zenia Zuraiq. 2025-12-01. Revisiting wideband pulsar timing measurements. https://doi.org/10.1093/mnras%2Fstag444

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