Compact continuum source finding for next generation radio surveys
We present a detailed analysis of four of the most widely used radio source-finding packagesin radio astronomy, and a program being developed for the Australian Square Kilometer ArrayPathfinder telescope. The four packages: SEXTRACTOR, SFIND, IMSAD and SELAVY are shown to produce source catalogues w...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Oxford University Press
2012
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| Online Access: | http://mnras.oxfordjournals.org/content/422/2/1812.full.pdf+html http://hdl.handle.net/20.500.11937/11571 |
| _version_ | 1848747841710718976 |
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| author | Hancock, Paul Murphy, T. Gaensler, B. Hopkins, A. Curran, J. |
| author_facet | Hancock, Paul Murphy, T. Gaensler, B. Hopkins, A. Curran, J. |
| author_sort | Hancock, Paul |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present a detailed analysis of four of the most widely used radio source-finding packagesin radio astronomy, and a program being developed for the Australian Square Kilometer ArrayPathfinder telescope. The four packages: SEXTRACTOR, SFIND, IMSAD and SELAVY are shown to produce source catalogues with high completeness and reliability. In this paper we analyse the small fraction (~1 per cent) of cases in which these packages do not perform well.This small fraction of sources will be of concern for the next generation of radio surveyswhich will produce many thousands of sources on a daily basis, in particular for blind radiotransients surveys. From our analysis we identify the ways in which the underlying sourcefinding algorithms fail. We demonstrate a new source-finding algorithm AEGEAN, based on the application of a Laplacian kernel, which can avoid these problems and can produce complete and reliable source catalogues for the next generation of radio surveys. |
| first_indexed | 2025-11-14T06:55:34Z |
| format | Journal Article |
| id | curtin-20.500.11937-11571 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:55:34Z |
| publishDate | 2012 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-115712017-02-28T01:32:58Z Compact continuum source finding for next generation radio surveys Hancock, Paul Murphy, T. Gaensler, B. Hopkins, A. Curran, J. We present a detailed analysis of four of the most widely used radio source-finding packagesin radio astronomy, and a program being developed for the Australian Square Kilometer ArrayPathfinder telescope. The four packages: SEXTRACTOR, SFIND, IMSAD and SELAVY are shown to produce source catalogues with high completeness and reliability. In this paper we analyse the small fraction (~1 per cent) of cases in which these packages do not perform well.This small fraction of sources will be of concern for the next generation of radio surveyswhich will produce many thousands of sources on a daily basis, in particular for blind radiotransients surveys. From our analysis we identify the ways in which the underlying sourcefinding algorithms fail. We demonstrate a new source-finding algorithm AEGEAN, based on the application of a Laplacian kernel, which can avoid these problems and can produce complete and reliable source catalogues for the next generation of radio surveys. 2012 Journal Article http://hdl.handle.net/20.500.11937/11571 http://mnras.oxfordjournals.org/content/422/2/1812.full.pdf+html Oxford University Press restricted |
| spellingShingle | Hancock, Paul Murphy, T. Gaensler, B. Hopkins, A. Curran, J. Compact continuum source finding for next generation radio surveys |
| title | Compact continuum source finding for next generation radio surveys |
| title_full | Compact continuum source finding for next generation radio surveys |
| title_fullStr | Compact continuum source finding for next generation radio surveys |
| title_full_unstemmed | Compact continuum source finding for next generation radio surveys |
| title_short | Compact continuum source finding for next generation radio surveys |
| title_sort | compact continuum source finding for next generation radio surveys |
| url | http://mnras.oxfordjournals.org/content/422/2/1812.full.pdf+html http://hdl.handle.net/20.500.11937/11571 |