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dc.contributor.authorHancock, Paul
dc.contributor.authorAnderson, Gemma
dc.contributor.authorWilliams, A.
dc.contributor.authorSokolowski, Marcin
dc.contributor.authorTremblay, S.E.
dc.contributor.authorRowlinson, A.
dc.contributor.authorCrosse, B.
dc.contributor.authorMeyers, B.W.
dc.contributor.authorLynch, Christene
dc.contributor.authorZic, A.
dc.contributor.authorBeardsley, A.P.
dc.contributor.authorEmrich, David
dc.contributor.authorFranzen, T.M.O.
dc.contributor.authorHorsley, L.
dc.contributor.authorJohnston-Hollitt, M.
dc.contributor.authorKaplan, D.L.
dc.contributor.authorKenney, D.
dc.contributor.authorMorales, M.F.
dc.contributor.authorPallot, D.
dc.contributor.authorSteele, K.
dc.contributor.authorTingay, Steven
dc.contributor.authorTrott, Cathryn
dc.contributor.authorWalker, Mia
dc.contributor.authorWayth, Randall
dc.contributor.authorWu, C.
dc.identifier.citationHancock, P.J. and Anderson, G.E. and Williams, A. and Sokolowski, M. and Tremblay, S.E. and Rowlinson, A. and Crosse, B. et al. A VOEvent based automatic trigger system for the Murchison Widefield Array. Publications of the Astronomical Society of Australia. 36: Article No. E046.

The Murchison Widefield Array (MWA) is an electronically steered low frequency ($<300$\,MHz) radio interferometer, with a `slew' time less than 8seconds. Low frequency ($\sim 100$\,MHz) radio telescopes are ideally suited for rapid-response follow-up of transients due to their large field of view, the inverted spectrum of coherent emission, and the fact that the dispersion delay between a 1GHz and 100MHz pulse is on the order of $1-10$\,min for dispersion measures of $100-2000$\,pc/cm$^3$. The MWA has previously been used to provide fast follow up for transient events including gamma-ray bursts, fast radio bursts, and gravitational waves, using systems that respond to gamma-ray coordinates network (GCN) packet-based notifications. We describe a system for automatically triggering MWA observations of such events, based on VOEvent triggers, which is more flexible, capable, and accurate than previous systems. The system can respond to external multi-messenger triggers, which makes it well-suited to searching for prompt coherent radio emission from gamma-ray bursts, the study of fast radio bursts and gravitational waves, single pulse studies of pulsars, and rapid follow-up of high-energy superflares from flare stars. The new triggering system has the capability to trigger observations in both the regular correlator mode (limited to $\geq 0.5$\,s integrations) or using the Voltage Capture System (VCS, $0.1$\,ms integration) of the MWA, and represents a new mode of operation for the MWA. The upgraded standard correlator triggering capability has been in use since MWA observing semester 2018B (July-Dec 2018), and the VCS and buffered mode triggers will become available for observing in a future semester.

dc.titleA VOEvent based automatic trigger system for the Murchison Widefield Array
dc.typeJournal Article
dcterms.source.titlePublications of the Astronomical Society of Australia

© Astronomical Society of Australia 2019; published by Cambridge University Press.

curtin.departmentSchool of Electrical Engineering, Computing and Mathematical Sciences (EECMS)
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidEmrich, David [0000-0002-4058-1837]
curtin.contributor.orcidHancock, Paul [0000-0002-4203-2946]
curtin.contributor.orcidAnderson, Gemma [0000-0001-6544-8007]
curtin.contributor.orcidSokolowski, Marcin [0000-0001-5772-338X]
curtin.contributor.orcidLynch, Christene [0000-0002-0494-192X]
curtin.contributor.orcidTingay, Steven [0000-0002-8195-7562]
curtin.contributor.orcidTrott, Cathryn [0000-0001-6324-1766]
curtin.contributor.orcidWayth, Randall [0000-0002-6995-4131]
curtin.contributor.orcidWalker, Mia [0000-0003-4077-6244]
curtin.contributor.researcheridEmrich, David [B-7002-2013]
curtin.contributor.researcheridHancock, Paul [G-8756-2014]
curtin.contributor.researcheridSokolowski, Marcin [B-5584-2013]
curtin.contributor.researcheridTingay, Steven [B-5271-2013]
curtin.contributor.scopusauthoridEmrich, David [36697878900]
curtin.contributor.scopusauthoridHancock, Paul [14527336500] [55958167000] [57193902921]
curtin.contributor.scopusauthoridAnderson, Gemma [10045028200]
curtin.contributor.scopusauthoridSokolowski, Marcin [8315206900]
curtin.contributor.scopusauthoridLynch, Christene [56927637600]
curtin.contributor.scopusauthoridTingay, Steven [7004903117]
curtin.contributor.scopusauthoridTrott, Cathryn [24438609500]
curtin.contributor.scopusauthoridWayth, Randall [8533270000]

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