The HIPASS catalogue - II. Completeness reliability and parameter accuracy
Contribuinte(s) |
A. C. Fabian |
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Data(s) |
01/01/2004
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Resumo |
The H I Parkes All Sky Survey (HIPASS) is a blind extragalactic H I 21-cm emission-line survey covering the whole southern sky from declination -90degrees to +25degrees. The HIPASS catalogue (HICAT), containing 4315 H I-selected galaxies from the region south of declination +2degrees, is presented in Meyer et al. (Paper I). This paper describes in detail the completeness and reliability of HICAT, which are calculated from the recovery rate of synthetic sources and follow-up observations, respectively. HICAT is found to be 99 per cent complete at a peak flux of 84 mJy and an integrated flux of 9.4 Jy km. s(-1). The overall reliability is 95 per cent, but rises to 99 per cent for sources with peak fluxes >58 mJy or integrated flux >8.2 Jy km s(-1). Expressions are derived for the uncertainties on the most important HICAT parameters: peak flux, integrated flux, velocity width and recessional velocity. The errors on HICAT parameters are dominated by the noise in the HIPASS data, rather than by the parametrization procedure. |
Identificador | |
Idioma(s) |
eng |
Publicador |
Oxford University Press |
Palavras-Chave | #Astronomy & Astrophysics #Observational #Methods #Surveys #Galaxies #Radio Lines #Galaxy Luminosity Function #Mass Function #Sky Survey #Selection #Methods : Observational #Methods : Statistical #Galaxies : Statistics #Radio Lines : Galaxies |
Tipo |
Journal Article |