... A1400 Date Received: 2000-Feb-01 15:08:18 Technical Page Proposal Type: Regular General Category: Astronomy Sub-Category: Spectroscopy Observation Category: Extragalactic Total Time Requested: 60 Hours Proposal Title: Determining the z< 0.1 Baryon Budget ABSTRACT: Due to considerable uncertainty in the high end of the scale length distribution for low surface brightness galaxies, the contribution of these galaxies to the baryon density in the local universe is currently a matter of debate. ...

... 2.3 Data acquisition Spectra generated by the Multibeam correlator contain the usual structure seen in spectra from other H i instruments: a bandpass spectrum which is the sum of the sky , ground and receiver temperatures multiplied by the product of the filters in the receiver chain; superimposed on this is a noise ... Note also that sources extended much beyond ,40 arcmin can be imaged poorly in HIPASS images because of the bandpass sidelobe effect described in Section 3.3. ...