ItemArticle

Low-frequency pulse-jitter measurement with the uGMRT I: PSR J0437-4715

Title
Low-frequency pulse-jitter measurement with the uGMRT I: PSR J0437-4715
Creator
Kikunaga T.; Hisano S.; Batra N.D.; Desai S.; Joshi B.C.; Bagchi M.; Prabu T.; Takahashi K.; Arumugam S.; Bathula A.; Dandapat S.; Deb D.; Dwivedi C.; Gupta Y.; Jacob S.J.; Kareem F.; Nobleson K.; Mamidipaka P.; Paladi A.K.; Pandian B.A.; Rana P.; Singha J.; Srivastava A.; Surnis M.; Tarafdar P.
Description
High-precision pulsar timing observations are limited in their accuracy by the jitter noise that appears in the arrival time of pulses. Therefore, it is important to systematically characterise the amplitude of the jitter noise and its variation with frequency. In this paper, we provide jitter measurements from low-frequency wideband observations of PSR J0437 4715 using data obtained as part of the Indian Pulsar Timing Array experiment. We were able to detect jitter in both the 300-500 MHz and 1 260-1 460 MHz observations of the upgraded Giant Metrewave Radio Telescope (uGMRT). The former is the first jitter measurement for this pulsar below 700 MHz, and the latter is in good agreement with results from previous studies. In addition, at 300-500 MHz, we investigated the frequency dependence of the jitter by calculating the jitter for each sub-banded arrival time of pulses. We found that the jitter amplitude increases with frequency. This trend is opposite as compared to previous studies, indicating that there is a turnover at intermediate frequencies. It will be possible to investigate this in more detail with uGMRT observations at 550-750 MHz and future high-sensitive wideband observations from next generation telescopes, such as the Square Kilometre Array. We also explored the effect of jitter on the high precision dispersion measure (DM) measurements derived from short duration observations. We find that even though the DM precision will be better at lower frequencies due to the smaller amplitude of jitter noise, it will limit the DM precision for high signal-to-noise observations, which are of short durations. This limitation can be overcome by integrating for a long enough duration optimised for a given pulsar. The Author(s), 2024. Published by Cambridge University Press on behalf of Astronomical Society of Australia.
Source
Publications of the Astronomical Society of Australia, Vol-41
Date
2024-01-01
Publisher
Cambridge University Press
Subject
pulsar timing method; pulsars: individual: PSR J0437-4715; Radio astronomy
Coverage
Kikunaga T., Graduate School Of Science And Technology, Kumamoto University, Kumamoto, Japan, Australia Telescope National Facility, Csiro Space And Astronomy, Epping, NSW, Australia; Hisano S., International Research Organization For Advanced Science And Technology, Kumamoto University, Kumamoto, Japan; Batra N.D., Department Of Physics And Astrophysics, Delhi University, Delhi, India; Desai S., Department Of Physics ,IIT Hyderabad, Telangana,Kandi, Hyderabad, India; Joshi B.C., National Centre For Radio Astrophysics (TIFR), Pune, India, Department Of Physics, Indian Institute Of Technology, Roorkee, India; Bagchi M., The Institute Of Mathematical Sciences, Taramani, Chennai, India, Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, India; Prabu T., Raman Research Institute, Bangalore, India; Takahashi K., International Research Organization For Advanced Science And Technology, Kumamoto University, Kumamoto, Japan, Faculty Of Advanced Science And Technology, Kumamoto University, Kumamoto, Japan; Arumugam S., Department Of Electrical Engineering,IIT Hyderabad, Telangana,Kandi, Hyderabad, India; Bathula A., Department Of Physical Sciences,IISER Mohali, Punjab, India; Dandapat S., Department Of Astronomy And Astrophysics, Tata Institute Of Fundamental Research, Navy Nagar, Colaba, Mumbai, India; Deb D., The Institute Of Mathematical Sciences, Taramani, Chennai, India; Dwivedi C., Department Of Earth And Space Sciences, Indian Institute Of Space Science And Technology, Kerala, Thiruvananthapuram, India; Gupta Y., National Centre For Radio Astrophysics, Pune University Campus, Pune, India; Jacob S.J., Department Of Physics, Government Brennen College, Kannur University, Kerala,Thalassery, Kannur, India; Kareem F., Department Of Physical Sciences, Iiser Kolkata, West Bengal, Mohanpur, India, Center Of Excellence In Space Sciences India, Iiser Kolkata, West Bengal, Mohanpur, India; Nobleson K., International Research Organization For Advanced Science And Technology, Kumamoto University, Kurokami, Kumamoto, Japan; Mamidipaka P., Department Of Electrical Engineering,IIT Hyderabad, Telangana,Kandi, Hyderabad, India; Paladi A.K., Department Of Physics, Indian Institute Of Science, Karnataka, Bengaluru, India; Pandian B.A., Raman Research Institute, Bangalore, India, Christ University, Bangalore, India; Rana P., Department Of Astronomy And Astrophysics, Tata Institute Of Fundamental Research, Navy Nagar, Colaba, Mumbai, India; Singha J., Department Of Mathematics And Applied Mathematics, University Of Cape Town, Cape Town, South Africa; Srivastava A., Department Of Physics ,IIT Hyderabad, Telangana,Kandi, Hyderabad, India; Surnis M., Department Of Physics, Indian Institute Of Science Education And Research Bhopal, Madhya Pradesh,Bhauri, Bhopal, India; Tarafdar P., The Institute Of Mathematical Sciences, Taramani, Chennai, India
Rights
All Open Access; Green Open Access
Relation
ISSN: 13233580
Format
Online
Language
English
Type
Article

Collection

Articles

Citation

Kikunaga T.; Hisano S.; Batra N.D.; Desai S.; Joshi B.C.; Bagchi M.; Prabu T.; Takahashi K.; Arumugam S.; Bathula A.; Dandapat S.; Deb D.; Dwivedi C.; Gupta Y.; Jacob S.J.; Kareem F.; Nobleson K.; Mamidipaka P.; Paladi A.K.; Pandian B.A.; Rana P.; Singha J.; Srivastava A.; Surnis M.; Tarafdar P., “Low-frequency pulse-jitter measurement with the uGMRT I: PSR J0437-4715,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/13154.

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