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    The discovery of terrestrial, swept-frequency emission that mimics an interstellar dispersive delay

    Access Status
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    Authors
    Burke-Spolaor, S.
    Ekers, Ronald
    Date
    2011
    Type
    Conference Paper
    
    Metadata
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    Citation
    Burke-Spolaor, S. and Ekers, R. 2011. The discovery of terrestrial, swept-frequency emission that mimics an interstellar dispersive delay.
    Source Title
    2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011
    DOI
    10.1109/URSIGASS.2011.6051299
    ISBN
    9781424451173
    School
    Curtin Institute of Radio Astronomy (Engineering)
    URI
    http://hdl.handle.net/20.500.11937/18888
    Collection
    • Curtin Research Publications
    Abstract

    We will detail the discovery of an anomalous terrestrial source of pulsed emission which exhibits a frequency-swept signal that closely mimics the frequency-dependent delay induced by dispersion in interstellar plasma. The signals were detected through the far sidelobes of Parkes Radio Telescope, appearing in all of the 13 independently-positioned receivers installed at the dish focus. The frequency-dependent delay and the sweep rates for most of the bursts are similar to those of a burst previously purported to be extragalactic. These bursts both call into question the extragalactic nature of that burst, and highlight the limitations of performing searches for one-off impulses with single dishes, in that they experience ambiguity in the positional localization of burst origins. © 2011 IEEE.

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