Proposal Identi cation No.: A1859 Date Received: 2004-Sep-29 11:19:38 Technical Page Proposal Type: Long-term General Category: Astronomy Sub-Category: Spectroscopy Observation Category: Galactic Total Time Requested: 400 Hours Proposal Title: A Large Survey for Methanol Masers ABSTRACT: The 5 1 6 0 A + methanol line at 6.668 GHz discovered by Menten (1991) is the brightest of the methanol maser transitions. ... X Maybe 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. ...