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Astronomy below the Survey Threshold in the SKA era

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Open access
Authors
Zwart, J.
Wall, J.
Karim, A.
Jackson, Carole
Norris, R.
Condon, J.
Afonso, J.
Heywood, I.
Jarvis, M.
Navarrete, F.
Prandoni, I.
Rigby, E.
Rottgering, H.
Santos, M.
Sargent, M.
Seymour, Nick
Taylor, R.
Vernstrom, T.
Date
2014
Type
Conference Paper

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Zwart, J. and Wall, J. and Karim, A. and Jackson, C. and Norris, R. and Condon, J. and Afonso, J. et al. 2014. Astronomy below the Survey Threshold in the SKA era, in R. Braun and G. Umana (ed), Proceedings of Advancing Astrophysics with the Square Kilometre Array, Jun 9-13 2014. Sicily, Italy: Proceedings of Science.
Source Title
Sub-threshold astronomy in the SKA era
Source Conference
Advancing Astrophysics with the Square Kilometre Array
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This open access article is distributed under the Creative Commons license http://creativecommons.org/licenses/by-nc-sa/4.0/

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Abstract

Astronomy at or below the survey threshold has expanded significantly since the publication of the original Science with the Square Kilometer Array in 1999 and its update in 2004. The techniques in this regime may be broadly (but far from exclusively) defined as confusion or P(D) analyses (analyses of one-point statistics), and stacking, accounting for the flux-density distribution of noise-limited images co-added at the positions of objects detected/isolated in a different waveband. Here we discuss the relevant issues, present some examples of recent analyses, and consider some of the consequences for the design and use of surveys with the SKA and its pathfinders.