... A2705 Date Received: 2012-Mar-01 13:38:28 Technical Page Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Continuum Galactic 13 Hours 1.5h Density Map of the W51 Giant Molecular Cloud Complex We aim to map the volume density across the face of the W51 molecular cloud complex in order to determine how massive star formation is progressing. ...

... 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. ...