Show simple item record

dc.contributor.authorMcKinley, B.
dc.contributor.authorBriggs, Frank
dc.contributor.authorKaplan, D.
dc.contributor.authorGreenhill, L.
dc.contributor.authorBernardi, G.
dc.contributor.authorBowman, Judd
dc.contributor.authorde Oliveira-Costa, A.
dc.contributor.authorTingay, Steven
dc.contributor.authorGaensler, B.
dc.contributor.authorOberoi, Divya
dc.contributor.authorJohnston-Hollitt, M.
dc.contributor.authorArcus, Wayne
dc.contributor.authorBarnes, D.
dc.contributor.authorBunton, John
dc.contributor.authorCappallo, Roger
dc.contributor.authorCorey, Brian
dc.contributor.authorDeshpande, Avinash
dc.contributor.authorDeSouza, Ludi
dc.contributor.authorEmrich, D.
dc.contributor.authorGoeke, Robert
dc.contributor.authorHazelton, Bryna
dc.contributor.authorHerne, David
dc.contributor.authorHewitt, Jacqueline
dc.contributor.authorKasper, Justin
dc.contributor.authorKincaid, Barton
dc.contributor.authorKoenig, R.
dc.contributor.authorKratzenberg, Eric
dc.contributor.authorLonsdale, Colin
dc.contributor.authorMcWhirter, S.
dc.contributor.authorMitchell, D.
dc.contributor.authorMorales, Miguel
dc.contributor.authorMorgan, Edward
dc.contributor.authorOrd, Stephen
dc.contributor.authorPathikulangara, Joseph
dc.contributor.authorPrabu, T.
dc.contributor.authorRemillard, Ron
dc.contributor.authorRogers, Alan
dc.contributor.authorRoshi, Anish
dc.contributor.authorSalah, J.
dc.contributor.authorSault, Robert
dc.contributor.authorShankar, N Udaya
dc.contributor.authorSrivani, K.
dc.contributor.authorStevens, J.
dc.contributor.authorSubrahmanyan, R.
dc.contributor.authorWayth, R.
dc.contributor.authorWaterson, Mark
dc.contributor.authorWebster, Rachel
dc.contributor.authorWhitney, Alan
dc.contributor.authorWilliams, A.
dc.contributor.authorWilliams, C.
dc.contributor.authorWyithe, J.
dc.identifier.citationMcKinley, B and Briggs, Frank and Kaplan, D and Greenhill, L and Bernardi, G and Bowman, Judd and de Oliveira-Costa, A. et al. 2013. Low-Frequency Observations of the Moon with the Murchison Widefield Array. Astronomical Journal 145 (1): 23.

A new generation of low-frequency radio telescopes is seeking to observe the redshifted 21 cm signal from the epoch of reionization (EoR), requiring innovative methods of calibration and imaging to overcome the difficulties of wide-field low-frequency radio interferometry. Precise calibration will be required to separate the expected small EoR signal from the strong foreground emission at the frequencies of interest between 80 and 300 MHz. The Moon may be useful as a calibration source for detection of the EoR signature, as it should have a smooth and predictable thermal spectrum across the frequency band of interest. Initial observations of the Moon with the Murchison Widefield Array 32 tile prototype show that the Moon does exhibit a similar trend to that expected for a cool thermally emitting body in the observed frequency range, but that the spectrum is corrupted by reflected radio emission from Earth. In particular, there is an abrupt increase in the observed flux density of the Moon within the internationally recognized frequency modulated (FM) radio band. The observations have implications for future low-frequency surveys and EoR detection experiments that will need to take this reflected emission from the Moon into account. The results also allow us to estimate the equivalent isotropic power emitted by the Earth in the FM band and to determine how bright the Earth might appear at meter wavelengths to an observer beyond our own solar system.

dc.subjectfirst stars
dc.subjectextraterrestrial intelligence
dc.subjectdark ages
dc.titleLow-Frequency Observations of the Moon with the Murchison Widefield Array
dc.typeJournal Article
dcterms.source.titleAstronomical Journal
curtin.accessStatusOpen access

Files in this item


This item appears in the following Collection(s)

Show simple item record