Limits of noise and confusion in the MWA GLEAM year 1 survey

T.M.O. Franzen, C.A. Jackson, J.R. Callingham, R.D. Ekers, P.J. Hancock, N. Hurley-Walker, J. Morgan, N. Seymour, R.B. Wayth, S.V. White, M.E. Bell, K.S. Dwarakanath, Bi-Qing For, B.M. Gaensler, L. Hindson, M. Johnston-Hollitt, Anna Kapinska, E. Lenc, B. Mckinley, A.R. OffringaP. Procopio, Lister Staveley-Smith, Chen Wu, Q. Zheng

    Research output: Chapter in Book/Conference paperConference paper

    Abstract

    The GaLactic and Extragalactic All-sky MWA survey (GLEAM) is a new relatively low resolution, contiguous 72-231 MHz survey of the entire sky south of declination +25. In this paper, we outline one approach to determine the relative contribution of system noise, classical confusion and sidelobe confusion in GLEAM images. An understanding of the noise and confusion properties of GLEAM is essential if we are to fully exploit GLEAM data and improve the design of future low-frequency surveys. Our early results indicate that sidelobe confusion dominates over the entire frequency range, implying that enhancements in data processing have the potential to further reduce the noise.
    Original languageEnglish
    Title of host publicationProceedings of Science
    Place of PublicationTrieste, Italy
    PublisherScuola Internazionale Superiore di Studi Avanzati (SISSA)
    Pages1-8
    Publication statusPublished - 2015
    EventThe many facets of extragalactic radio surveys: towards new scientific challenges - CRN Research Area, 101 Via Gobetti, Bologna, Italy
    Duration: 20 Oct 201523 Oct 2015
    Conference number: 123437
    https://pos.sissa.it/267/

    Conference

    ConferenceThe many facets of extragalactic radio surveys
    Abbreviated titleEXTRA-RADSUR2015
    CountryItaly
    CityBologna
    Period20/10/1523/10/15
    Internet address

    Cite this

    Franzen, T. M. O., Jackson, C. A., Callingham, J. R., Ekers, R. D., Hancock, P. J., Hurley-Walker, N., Morgan, J., Seymour, N., Wayth, R. B., White, S. V., Bell, M. E., Dwarakanath, K. S., For, B-Q., Gaensler, B. M., Hindson, L., Johnston-Hollitt, M., Kapinska, A., Lenc, E., Mckinley, B., ... Zheng, Q. (2015). Limits of noise and confusion in the MWA GLEAM year 1 survey. In Proceedings of Science (pp. 1-8). Scuola Internazionale Superiore di Studi Avanzati (SISSA).