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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6459
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dc.contributor.authorRowlinson, A.-
dc.contributor.authorBell, M.E.-
dc.contributor.authorDeshpande, A.A.-
dc.contributor.authorUdaya Shankar, N.-
dc.contributor.authorSrivani, K.S.-
dc.contributor.authorSubrahmanyan, Ravi-
dc.contributor.authorPrabu, T.-
dc.contributor.author+30 Co-authors-
dc.date.accessioned2016-10-20T05:31:04Z-
dc.date.available2016-10-20T05:31:04Z-
dc.date.issued2016-06-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2016, Vol. 458, p 3506-3522en_US
dc.identifier.issn0035-8711-
dc.identifier.issn1365-2966 - (online)-
dc.identifier.urihttp://hdl.handle.net/2289/6459-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en_US
dc.description.abstractWe present a survey for transient and variable sources, on time-scales from 28 s to ∼1 yr, using the Murchison Widefield Array (MWA) at 182 MHz. Down to a detection threshold of 0.285 Jy, no transient candidates were identified, making this the most constraining low-frequency survey to date and placing a limit on the surface density of transients of <4.1 × 10−7 deg−2 for the shortest time-scale considered. At these frequencies, emission from Fast Radio Bursts (FRBs) is expected to be detectable in the shortest time-scale images without any corrections for interstellar or intergalactic dispersion. At an FRB limiting flux density of 7980 Jy, we find a rate of <82 FRBs per sky per day for dispersion measures <700 pc cm−3. Assuming a cosmological population of standard candles, our rate limits are consistent with the FRB rates obtained by Thornton et al. if they have a flat spectral slope. Finally, we conduct an initial variability survey of sources in the field with flux densities ≳0.5 Jy and identify no sources with significant variability in their light curves. However, we note that substantial further work is required to fully characterize both the short-term and low-level variability within this field.en_US
dc.language.isoenen_US
dc.publisherOxford University Press for The Royal Astronomical Societyen_US
dc.relation.urihttp://adsabs.harvard.edu/abs/2016MNRAS.458.3506Ren_US
dc.relation.urihttp://arxiv.org/abs/1602.07544en_US
dc.relation.urihttp://dx.doi.org/10.1093/mnras/stw451en_US
dc.rights2016 The authors & the Royal Astronomical Society.en_US
dc.subjectinstrumentation: interferometers techniquesen_US
dc.subjectimage processing cataloguesen_US
dc.subjectradio continuum:en_US
dc.subject24 monthsen_US
dc.titleLimits on fast radio bursts and other transient sources at 182 MHz using the Murchison widefield arrayen_US
dc.typeArticleen_US
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