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Deep Observations with the Parkes 21-cm Multibeam System

Published online by Cambridge University Press:  05 March 2013

M. J. Disney ,
P. J. Boyce ,
G. D. Banks ,
R. F. Minchin  and
A. E. Wright
M. J. Disney
Affiliation:
University of Wales, Cardiff, PO Box 913, Cardiff CF2 3YB, UK; [email protected]
P. J. Boyce
Affiliation:
University of Wales, Cardiff, PO Box 913, Cardiff CF2 3YB, UK; [email protected]
G. D. Banks
Affiliation:
University of Wales, Cardiff, PO Box 913, Cardiff CF2 3YB, UK; [email protected]
R. F. Minchin
Affiliation:
University of Wales, Cardiff, PO Box 913, Cardiff CF2 3YB, UK
A. E. Wright
Affiliation:
University of Wales, Cardiff, PO Box 913, Cardiff CF2 3YB, UK; [email protected]
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Abstract

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We report on a preliminary analysis of a 5600 sec per point survey of 32 square degrees in Centaurus, carried out with the Parkes 13-beam system. The signal-to-noise ratio is found to improve as for the whole integration. We have detected 102 HI sources between +250 and +12,700 km s−1 either by eye or by using the new galaxy-finding algorithm PICASSO. Over half of these are new HI detections. Around a dozen of these are not associated with catalogued galaxies and, in two of these cases, we have not identified an optical counterpart on the Digitized Sky Survey. Arguments are put forward to explain why deep integrations are needed to find low surface brightness objects.

Keywords

galaxies: distances and redshiftsgalaxies: luminosity functionsgalaxies: mass functiongalaxies: statistics
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 16 , Issue 1 , 1999 , pp. 66 - 69
Copyright
Copyright © Astronomical Society of Australia 1999

References

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