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    A wider audience: Turning VLBI into a survey instrument

    Access Status
    Fulltext not available
    Authors
    Middelberg, E
    Deller, A
    Brisken, W
    Morgan, John
    Norris, R
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Middelberg, E. and Deller, A.T. and Brisken, W.F. and Morgan, J.S. and Norris, R.P. 2012. A wider audience: Turning VLBI into a survey instrument. Astronomische Nachrichten. 333 (5-6): pp. 447-452.
    Source Title
    Astronomische Nachrichten
    Additional URLs
    http://onlinelibrary.wiley.com/doi/10.1002/asna.201211687/abstract
    ISSN
    0004-6337
    URI
    http://hdl.handle.net/20.500.11937/18713
    Collection
    • Curtin Research Publications
    Abstract

    Radio observations using the Very Long Baseline Interferometry (VLBI) technique typically have fields of view of only a few arcseconds, due to the computational problems inherent in imaging larger fields. Furthermore, sensitivity limitations restrict observations to very compact and bright objects, which are few and far between on the sky. Thus, while most branches of observational astronomy can carry out sensitive, wide-field surveys, VLBI observations are limited to targeted observations of carefully selected objects. However, recent advances in technology have made it possible to carry out the computations required to target hundreds of sources simultaneously. Furthermore, sensitivity upgrades have dramatically increased the number of objects accessible to VLBI observations. The combination of these two developments have enhanced the survey capabilities of VLBI observations such that it is now possible to observe (almost) any point in the sky with milli-arcsecond resolution. In this talk I review the development of wide-field VLBI, which has made significant progress over the last three years.

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