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Observations of crab giant pulses in 20-84 MHz using LWA1

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dc.contributorVirginia Techen
dc.contributor.authorEllingson, Steven W.en
dc.contributor.authorClarke, Tracy E.en
dc.contributor.authorCraig, J.en
dc.contributor.authorHicks, B. C.en
dc.contributor.authorLazio, T. J. W.en
dc.contributor.authorTaylor, G. B.en
dc.contributor.authorWilson, T. L.en
dc.contributor.authorWolfe, C. N.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessed2014-02-05en
dc.date.accessioned2014-02-25T13:57:04Zen
dc.date.available2014-02-25T13:57:04Zen
dc.date.issued2013-05-01en
dc.description.abstractWe report the detection and observed characteristics of giant pulses from the Crab Nebula pulsar (B0531+21) in four frequency bands covering 20-84 MHz using the recently completed Long Wavelength Array Station 1 (LWA1) radio telescope. In 10 hr of observations distributed over a 72 day period in fall of 2012, 33 giant pulses having peak flux densities between 400 Jy and 2000 Jy were detected. Twenty-two of these pulses were detected simultaneously in channels of 16 MHz bandwidth centered at 44 MHz, 60 MHz, and 76 MHz, including one pulse which was also detected in a channel centered at 28 MHz. We quantify statistics of pulse amplitude and pulse shape characteristics, including pulse broadening. Amplitude statistics are consistent with expectations based on extrapolations from previous work at higher and lower frequencies. Pulse broadening is found to be relatively high, but not significantly greater than expected. We present procedures that have been found to be effective for observing giant pulses in this frequency range.en
dc.description.sponsorship6.1 base fundingen
dc.description.sponsorshipOffice of Naval Research N00014-07-C-0147en
dc.description.sponsorshipNational Science Foundation of the University Radio Observatories program AST-1139963, AST-1139974en
dc.description.sponsorshipNational Radio Astronomy Observatoryen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationS. W. Ellingson et al. 2013. "observations of crab giant pulses in 20-84 MHz using LWA1," ApJ 768 136 doi:10.1088/0004-637X/768/2/136en
dc.identifier.doihttps://doi.org/10.1088/0004-637x/768/2/136en
dc.identifier.issn0004-637Xen
dc.identifier.urihttp://hdl.handle.net/10919/25546en
dc.identifier.urlhttp://iopscience.iop.org/0004-637X/768/2/136/pdf/0004-637X_768_2_136.pdfen
dc.language.isoenen
dc.publisherIOP Publishingen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectISM: individual objects (crab nebula)en
dc.subjectISM: structureen
dc.subjectPulsars: generalen
dc.subjectpulsars: individual (crab pulsar)en
dc.subjectScatteringen
dc.subjectNebula pulsaren
dc.subjectRadio sourcesen
dc.subjectScatteringen
dc.subjectDispersionen
dc.subjectVariabilityen
dc.subjectBurstsen
dc.subjectSystemsen
dc.subjectArrayen
dc.subjectCASen
dc.titleObservations of crab giant pulses in 20-84 MHz using LWA1en
dc.title.serialAstrophysical Journalen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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