Deep observations with the Parkes 21-cm multibeam system

Details Deep observations with the Parkes 21-cm multibeam system Deep observations with the Parkes 21-cm multibeam system

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pasa...16...66d&link_type=abstract

Publications Astronomical Society of Australia, vol. 16, no. 1, p. 66-9

Statistics

2

Galaxy Distances, Luminosity Function, Mass Function, Galaxy Statistics

Scientific paper

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 is found to improve as the square root of the observing time for the whole integration. We have detected 102 HI sources between +250 and +12,700 km per sec 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.

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