A1625 2002-Feb-01 15:13:28 Technical Page Proposal Type: Long-term General Category: Astronomy Sub-Category: Spectroscopy Observation Category: Extragalactic Total Time Requested: 45 Hours Proposal Title: Properties of the ISM of a sample of the most isolated galaxies: Atomic gas content. ... Our source is the Catalog of Isolated Galaxies and our sample contains 760 galaxies for which we are building a multiwavelength database. ... This proposal requires coordination with GPS L3 at 1381 MHz. ...

... 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. ...