... A2638 Date Received: 2011-Feb-14 13:39:09 Technical Page Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: Urgent Astronomy Spectroscopy Extragalactic 4 Hours Radio Line Observations: An Educational Pro ject using the Arecibo 305m Tele- scope ABSTRACT: The increased remote observing capabilities of astronomical observatories allow their use in higher education. ...

... 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. ...