Proposal Identification No.: ... The previous proposal number is A2715. Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Extragalactic 39 hours Hours HI Content of Mid-IR Bright, Low Metallicity Blue Compact Dwarf Galaxies We propose to measure the HI contents of 10 selected nearby metal-poor blue compact dwarf galaxies (BCDs) using ALFA on Arecibo Telescope. ...

... 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. ...