The HIPASS catalogue - II. Completeness, reliability and parameter accuracy
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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- June 2004
- DOI:
- 10.1111/j.1365-2966.2004.07782.x
- arXiv:
- arXiv:astro-ph/0406380
- Bibcode:
- 2004MNRAS.350.1210Z
- Keywords:
-
- methods: observational;
- methods: statistical;
- surveys;
- galaxies: statistics;
- radio lines: galaxies;
- Astrophysics
- E-Print:
- Accepted for publication in MNRAS. 12 pages, 11 figures. Paper with higher resolution figures can be downloaded from http://hipass.aus-vo.org