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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/7935
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dc.contributor.authorJishnu, N.-
dc.contributor.authorMcKinley, Benjamin-
dc.contributor.authorTrott, Cathryn M.-
dc.contributor.authorJones, Jake-
dc.contributor.authorUng, Daniel C. X.-
dc.date.accessioned2022-05-10T09:24:17Z-
dc.date.available2022-05-10T09:24:17Z-
dc.date.issued2022-04-21-
dc.identifier.citationPublications of the Astronomical Societyof Australia, 2022, Vol.39, Articel Number : e018en_US
dc.identifier.issn1323-3580-
dc.identifier.issn1448-6083 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/7935-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en_US
dc.description.abstractGlobal 21-cm experiments require exquisitely precise calibration of the measurement systems in order to separate the weak 21-cm signal from Galactic and extragalactic foregrounds as well as instrumental systematics. Hitherto, experiments aiming to make this measurement have concentrated on measuring this signal using the single element approach. However, an alternative approach based on interferometers with short baselines is expected to alleviate some of the difficulties associated with a single element approach such as precision modelling of the receiver noise spectrum. Short spacing Interferometer Telescope probing cosmic dAwn and epoch of ReionisAtion (SITARA) is a short spacing interferometer deployed at the Murchison Radio-astronomy Observatory (MRO). It is intended to be a prototype or a test-bed to gain a better understanding of interferometry at short baselines, and develop tools to perform observations and data calibration. In this paper, we provide a description of the SITARA system and its deployment at the MRO, and discuss strategies developed to calibrate SITARA. We touch upon certain systematics seen in SITARA data and their modelling. We find that SITARA has sensitivity to all sky signals as well as non-negligible noise coupling between the antennas. It is seen that the coupled receiver noise has a spectral shape that broadly matches the theoretical calculations reported in prior works. We also find that when appropriately modified antenna radiation patterns taking into account the effects of mutual coupling are used, the measured data are well modelled by the standard visibility equation.en_US
dc.language.isoenen_US
dc.publisherPublished by Cambridge University Press on behalf of the Astronomical Society of Australiaen_US
dc.relation.urihttp://adsabs.harvard.edu/abs/en_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2022PASA...39...18T/abstracten_US
dc.relation.urihttps://doi.org/10.1017/pasa.2022.13en_US
dc.rights2022 The Author(s)en_US
dc.subjectcosmologyen_US
dc.subjectdark agesen_US
dc.subjectreionizationen_US
dc.subjectfirst starsen_US
dc.subjectearly universeen_US
dc.subjectinstrumentationen_US
dc.subjectinterferometersen_US
dc.subjectdata analysisen_US
dc.subjectobservationsen_US
dc.titleSystem design and calibration of SITARA—a global 21 cm short spacing interferometer prototypeen_US
dc.typeArticleen_US
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