... A1901 Date Received: 2004-Jan-29 18:49:22 Technical Page Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Galactic 20 Hours OH Zeeman Test of Faraday Rotation in Dark Cloud Envelopes The magnetic supp ort mo del for star formation has ambip olar diffusion increasing the mass-to-magnetic flux ratio in cores until they b ecome magnetically sup ercritical and collapse. ... 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. ...