Proposal Identi cation No.: A1712 Date Received: 2002-May-31 23:19:54 Technical Page Proposal Type: Regular General Category: Astronomy Sub-Category: Spectroscopy Observation Category: Galactic Total Time Requested: 27 Hours Proposal Title: H 2 CO-6cm Emission as a Probe for Dense and Cold Molecular Cores ABSTRACT: Formaldehyde has been successfully used as a probe of physical conditions in dense molecular clouds. ... 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. ...