HIPASS survey collection

After gridding an r.m.s. noise of about 13.3 mJy was achieved in the first set of HIPASS cubes. The observations and techniques used to calibrate and image the data are described in Barnes et al. (2001). The processing algorithms are successfully designed to be statistically robust to the presence of interference signals and are particular to imaging point (or nearly point) sources, not extended emission.

Specifically, a major improvement in image quality is obtained by designing a median-gridding algorithm which uses the median estimator in place of the mean estimator. While the average Parkes beam FWHM is 14.3 arcmin, the average gridded HIPASS beam is about 15.5 arcmin. The full data release contains data from 538 data cubes (size: 8o x 8o, 388 over the entire southern sky (DEC %3C +2o), and 150 over the northern sky, (DEC %3C +25o).

The one-dimensional spectral data for a given position is available for downloading in a variety of different formats.Original acknowledgement for data: The Parkes telescope is part of the Australia Telescope which is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO.