{"paper":{"title":"The Murchison Widefield Array Transients Survey (MWATS). A search for low frequency variability in a bright Southern hemisphere sample","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"A. A. Deshpande, A. R. Offringa, A. Rowlinson, A. Williams, B. J. Hazelton, B. M. Gaensler, C. J. Lonsdale, C. L. Williams, D. A. Mitchell, D. L. Kaplan, D. Oberoi, E. Morgan, E. M. Sadler, F. Briggs, G. Bernardi, J. D. Bowman, J. R. Callingham, J. S. Morgan, K. S. Srivani, L. J. Greenhill, M. E. Bell, M. F. Morales, M. Johnston-Hollitt, N. Hurley-Walker, N. Udaya Shankar, P. G. Edwards, P. J. Hancock, R. B. Wayth, R. Chhetri, R. J. Cappallo, R. L. Webster, R. Subrahmanyan, R. W. Hunstead, S. Croft, S. Johnston, S. J. Tingay, S. M. Ord, S. R. McWhirter, S. V. White, Tara Murphy, T. Prabu","submitted_at":"2018-10-24T02:07:17Z","abstract_excerpt":"We report on a search for low-frequency radio variability in 944 bright (> 4Jy at 154 MHz) unresolved, extragalactic radio sources monitored monthly for several years with the Murchison Widefield Array. In the majority of sources we find very low levels of variability with typical modulation indices < 5%. We detect 15 candidate low frequency variables that show significant long term variability (>2.8 years) with time-averaged modulation indices M = 3.1 - 7.1%. With 7/15 of these variable sources having peaked spectral energy distributions, and only 5.7% of the overall sample having peaked spec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.10152","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}