... A2088 Date Received: 2005-Feb-04 12:03:59 Technical Page Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy 28 Hours An 8-10 GHz spectral line survey of G34.3+0.15 Molecular line studies of the earliest phases of massive star formation in the sub/millimetric range have pro duce great advances in our knowledge of their physical and chemical conditions. ... Part of the observing run. ...

... 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. ...