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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/8438
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dc.contributor.authorKumar, Vinay-
dc.contributor.authorNityananda, Rajaram-
dc.contributor.authorSamuel, Joseph-
dc.date.accessioned2025-08-25T05:51:29Z-
dc.date.available2025-08-25T05:51:29Z-
dc.date.issued2025-08-18-
dc.identifier.citationJournal of Astrophysics and Astronomy, 2025, Vol.46, Article No. 56en_US
dc.identifier.urihttp://hdl.handle.net/2289/8438-
dc.descriptionOpen Accessen_US
dc.description.abstractAperture synthesis observations in radio wavelengths with full polarisation, have long been used to study the magnetic fields of synchrotron-emitting sources. Recently proposed closure invariants – quantities immune to antenna-specific signal corruptions – give us a powerful method for extracting information from measured visibilities, which are corrupted by antenna and polarisation-dependent gains. This paper extends a formalism developed earlier for complete graphs (where all visibilities are available) to incomplete graphs. The formalism provides a complete and independent set of closure invariants from the measured visibilities in a general situation, where not all visibilities are available. We then show in a simulated, quasi-realistic case, that the invariants developed here contain usable information even in the presence of noise.en_US
dc.language.isoenen_US
dc.publisherSpringer for Indian Academy of Sciencesen_US
dc.relation.urihttps://arxiv.org/abs/2407.00583en_US
dc.relation.urihttps://doi.org/10.1007/s12036-025-10081-9en_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2024arXiv240700583K/abstracten_US
dc.rights2025 Indian Academy of Sciencesen_US
dc.subjectAperture synthesisen_US
dc.subjectpolarisationen_US
dc.subjectclosure invariantsen_US
dc.titleClosure invariants for polarised radio interferometric observations: A graph theoretical approachen_US
dc.typeArticleen_US
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