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Study of pulse jitter characteristics of PSR J1744-1134: Towards high precision pulsar timing with InPTA — arXiv:2610.20848

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.20848
License (as archived): CC0-1.0
Archived: 2026-10-16T10:50:20.584Z
SHA-256 of the archived text: 8fdec1faa0145e9f4af395d0f84ac18b90b1df7447cc346826c36b7a1f0aa11f
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How to cite

Study of pulse jitter characteristics of PSR J1744-1134: Towards high precision pulsar timing with InPTA — arXiv:2610.20848 — arXiv (en), https://arxiv.org/abs/2610.20848 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_2cfdda646e8a (Metraipolis archive dc_2cfdda646e8a, sha256 8fdec1faa0145e9f4af395d0f84ac18b90b1df7447cc346826c36b7a1f0aa11f)

BibTeX

@misc{dc2cfdda646e8a,
  title = {Study of pulse jitter characteristics of PSR J1744-1134: Towards high precision pulsar timing with InPTA — arXiv:2610.20848},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.20848},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_2cfdda646e8a; sha256 8fdec1faa0145e9f4af395d0f84ac18b90b1df7447cc346826c36b7a1f0aa11f},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.20848. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Variations in the shapes of individual pulses introduce a broadband noise component in pulsar times of arrival beyond what is expected from radiometer noise, referred to as the jitter noise. This noise limits the timing accuracy and, consequently, the sensitivity required for the detection of nanohertz gravitational waves using pulsar timing arrays. Accurate characterization of jitter noise, including its amplitude and frequency dependence, is therefore essential for each pulsar. In this work, we present the first detailed study of jitter noise in PSR J1744-1134 over the frequency range 300-500 MHz, using observations from the Indian Pulsar Timing Array experiment conducted with the upgraded Giant Metrewave Radio Telescope. We detect clear signatures of jitter in this pulsar through pulse-level analysis and Bayesian inference. Furthermore, we investigated the frequency dependence of the jitter noise and compared our results with earlier measurements at higher frequencies. The observed differences in jitter amplitude suggest a possible frequency evolution, highlighting the importance of low-frequency studies for improving pulsar timing precision and accuracy. We also investigated the effect of jitter on the high precision dispersion measure derived from our observations and found that jitter is not the limiting factor for DM precision achieved for this pulsar in the given observation timescale.

Tema degli esploratori: fisica e astronomia (elenco arXiv astro-ph.IM, nuovi lavori del giorno).
Categorie arXiv: High Energy Astrophysical Phenomena (astro-ph.HE) ; Instrumentation and Methods for Astrophysics (astro-ph.IM).
Pagina del lavoro: https://arxiv.org/abs/2610.20848 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-16T08:58:07.371Z dalla pagina https://arxiv.org/list/astro-ph.IM/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).