1. RRI Digital Repository
  2. 04. Astronomy and Astrophysics
  3. Research Papers (A&A)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/8704
Full metadata record
DC FieldValueLanguage
dc.contributor.authorNobleson, K-
dc.contributor.authorDwivedi, Churchil-
dc.contributor.authorDesai, Shantanu-
dc.contributor.authorJoshi, Bhal Chandra-
dc.contributor.authorGrover, Himanshu-
dc.contributor.authorDeb, Debabrata-
dc.contributor.authorVyasraj, Vaishnavi-
dc.contributor.authorVara, Kunjal-
dc.contributor.authorTahbildat, Hemanga-
dc.contributor.authorSusobhanah, Abhimanyu-
dc.contributor.authorSurnis, Mayuresh-
dc.contributor.authorSrivastava, Aman-
dc.contributor.authorSardana, Shubhit-
dc.contributor.authorTakahashi, Keitaro-
dc.contributor.authorAmarnath-
dc.contributor.authorArumugam, P-
dc.contributor.authorBagchi, Manjari-
dc.contributor.authorBatra, Neelam Dhanda-
dc.contributor.authorChakraborty, Manoneeta-
dc.contributor.authorChowdhury, Shaswata-
dc.contributor.authorJacob, Shebin Jose-
dc.contributor.authorJose, Jibin-
dc.contributor.authorKala, Shubham-
dc.contributor.authorKato, Ryo-
dc.contributor.authorKrishnakumar, M A-
dc.contributor.authorMeena, Kuldeep-
dc.contributor.authorPaladi, Avinash Kumar-
dc.contributor.authorPandian, Arul-
dc.contributor.authorRai, Kaustubh-
dc.contributor.authorRana, Prerna-
dc.contributor.authorSingh, Manpreet-
dc.contributor.authorSingha, Jaikhomba-
dc.contributor.authorShukla, Adya-
dc.contributor.authorTarafdar, Pratik-
dc.contributor.authorThiagraj, Prabu-
dc.contributor.authorZuraiq, Zenia-
dc.date.accessioned2026-04-15T05:08:23Z-
dc.date.available2026-04-15T05:08:23Z-
dc.date.issued2026-07-
dc.identifier.citationJournal of High Energy Astrophysics, Vol. 53 (7), AR No. 100594en_US
dc.identifier.issn2214-4056-
dc.identifier.urihttp://hdl.handle.net/2289/8704-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en_US
dc.description.abstractWe present the results of customised single-pulsar noise analysis of 27 millisecond pulsars from the second data release of the Indian Pulsar Timing Array (InPTA-DR2). We model various stochastic noise sources present in the dataset using stationary Gaussian processes and estimate the noise budget of the InPTA-DR2 using Bayesian inference, involving model selection, Fourier harmonics selection, and parameter estimation for each pulsar. We check the efficacy of our noise characterisation by performing the Anderson-Darling test for Gaussianity on the noise-subtracted residuals. We find that all 11 pulsars with time baseline  ≲ 2.5 yr show Gaussian residuals and do not have evidence for any red noise process in the optimal model, except for PSR J1944 + 0907, which shows presence of DM noise. PSRs J0437 - 4715, J1909 - 3744 and J1939 + 2134 show preference for the most complicated noise model, having achromatic and chromatic red noise processes. Only 4 out of 15 pulsars with time baseline  ≳ 2.5 yr show significant non-Gaussianity in noise-subtracted residuals. We suspect that this may require more advanced methods to model noise processes properly. A comparative study of six pulsars with data removed near solar conjunctions showed deviations from the parameter estimates obtained with the original dataset, indicating potential bias in red noise processes due to unmodeled solar-wind effects. The results presented in this work remain broadly consistent with the InPTA-DR1 noise budget, with better constraints obtained on noise processes for several pulsars and support for achromatic red noise in PSR J1012 + 5307 due to the extended time baseline.en_US
dc.language.isoenen_US
dc.publisherJournal of High Energy Astrophysicsen_US
dc.relation.urihttps://doi.org/10.48550/arXiv.2512.20455en_US
dc.relation.urihttps://doi.org/10.1016/j.jheap.2026.100594en_US
dc.rights© 2026 Published by Elsevier B.V.en_US
dc.subjectPulsarsen_US
dc.subjectNeutron starsen_US
dc.subjectGravitational wavesen_US
dc.subjectPulsar timing arraysen_US
dc.titleThe indian pulsar timing array data release 2: II. Customised single-pulsar noise analysis and noise budgeten_US
dc.typeArticleen_US
Appears in Collections:Research Papers (A&A)

Files in This Item:
File Description SizeFormat 
2026_Journal of High Energy Astrophysics_Vol 53 (7)_AR No 100594.pdf
  Restricted Access		Restricted Access15.13 MBAdobe PDFView/Open Request a copy
Show simple item record


Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.