The HIPASS catalogue - II. Completeness, reliability and parameter accuracy
Pierce, M. J.; Disney, M. J.; Oosterloo, T.; Putman, M. E.; Gibson, B. K.; Ryder, S. D.; Price, R. M.; Wenster, R. L.; Harnett, J. I.; Henning, P. A.; Jerjen, H.; Howlett, M.; Mader, S.; Barnes, D. G.; Stootman, F.; Sadler, E. M.; Meyer, M. J.; Stevens, J.; Bhathal, R.; Kesteven, M. J. Kilborn, V. A.; Drinkwater, M. J.; Staveley-Smith, L.; Wright, A. E.; Ryan-Weber, E.; Minchin, R. F.; O'Brien, J.; de Blok, W. J.; Garcia, D. A.; Freeman, K. C.; Marquarding, M.; Ekers, R. D.; Stewart, I. M.; Zwaan, M. A.; Knezek, P. M.; Koribalski, B. S.; Waugh, M.
Date:
2004
Abstract:
The HI Parkes All Sky Survey (HIPASS) is a blind extragalactic HI 21-cm emission-line survey
covering the whole southern sky from declination −90◦ to +25◦. The HIPASS catalogue
(HICAT), containing 4315 HI-selected galaxies from the region south of declination +2◦,
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.
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