Surveying The Dynamic Radio Sky With The Long Wavelength Demonstrator Array

dc.contributor.utaustinauthorYork, J. A.en_US
dc.contributor.utaustinauthorKerkhoff, A.en_US
dc.creatorLazio, T. Joseph W.en_US
dc.creatorClarke, Tracy E.en_US
dc.creatorLane, W. M.en_US
dc.creatorGross, C.en_US
dc.creatorKassim, N. E.en_US
dc.creatorRay, P. S.en_US
dc.creatorWood, D.en_US
dc.creatorYork, J. A.en_US
dc.creatorKerkhoff, A.en_US
dc.creatorHicks, B.en_US
dc.creatorPolisensky, E.en_US
dc.creatorStewart, K.en_US
dc.creatorDalal, N. P.en_US
dc.creatorCohen, A. S.en_US
dc.creatorErickson, W. C.en_US
dc.description.abstractThis paper presents a search for radio transients at a frequency of 73.8 MHz (4 m wavelength) using the all-sky imaging capabilities of the Long Wavelength Demonstrator Array (LWDA). The LWDA was a 16-dipole phased array telescope, located on the site of the Very Large Array in New Mexico. The field of view of the individual dipoles was essentially the entire sky, and the number of dipoles was sufficiently small that a simple software correlator could be used to make all-sky images. From 2006 October to 2007 February, we conducted an all-sky transient search program, acquiring a total of 106 hr of data; the time sampling varied, being 5 minutes at the start of the program and improving to 2 minutes by the end of the program. We were able to detect solar flares, and in a special-purpose mode, radio reflections from ionized meteor trails during the 2006 Leonid meteor shower. We detected no transients originating outside of the solar system above a flux density limit of 500 Jy, equivalent to a limit of no more than about 10(-2) events yr(-1) deg(-2), having a pulse energy density greater than or similar to 1.5 x 10(-20) J m(-2) Hz(-1) at 73.8 MHz for pulse widths of about 300 s. This event rate is comparable to that determined from previous all-sky transient searches, but at a lower frequency than most previous all-sky searches. We believe that the LWDA illustrates how an all-sky imaging mode could be a useful operational model for low-frequency instruments such as the Low Frequency Array, the Long Wavelength Array station, the low-frequency component of the Square Kilometre Array, and potentially the Lunar Radio Array.en_US
dc.description.departmentApplied Research Laboratoriesen_US
dc.description.sponsorshipNASA Lunar Science Institute NNA09DB30Aen_US
dc.description.sponsorship6.1 Baseen_US
dc.identifier.citationLazio, T. Joseph W., Tracy E. Clarke, W. M. Lane, C. Gross, N. E. Kassim, P. S. Ray, D. Wood et al. >Surveying the dynamic radio sky with the long wavelength demonstrator array.> The Astronomical Journal, Vol. 140, No. 6 (Dec., 2010): 1995.en_US
dc.relation.ispartofserialAstronomical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectinstrumentation: interferometersen_US
dc.subjectmethods: observationalen_US
dc.subjectcontinuum: generalen_US
dc.subjectgamma-ray burstsen_US
dc.subjectstellar wind conditionsen_US
dc.subjectextrasolar planetsen_US
dc.subjectcrab pulsaren_US
dc.subjectfrequency observationsen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleSurveying The Dynamic Radio Sky With The Long Wavelength Demonstrator Arrayen_US

Access full-text files

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
2.7 MB
Adobe Portable Document Format