... R2191 Date Received: 2006-Dec-16 16:06:25 Technical Page Proposal Type: General Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT: Asteroid 105 Artemis was found to have two hemispheres with different compositions: one side with hydrated silicates on the surface, one without. Our on-going observations (R1885) suggest that hydrated silicates are correlated with high radar albedo, which is a very valuable remote sensing tool. ... 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. ...