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Published December 19, 2011 | Submitted
Journal Article Open

Optimal Multiwavelength Source Detection: Experience Gained from the WISE Mission

Abstract

We discuss the optimal detection of point sources from multiwavelength imaging data using an approach, referred to as MDET, which requires no prior knowledge of the source spectrum. MDET may be regarded as a somewhat more general version of the so-called 'chi-squared' technique. We describe the theoretical basis of the technique, and show examples of its performance with four-channel infrared broad-band imaging data from the WISE mission. We also discuss the potential benefits of applying it to the multifrequency data cubes of the ASKAP surveys, and suggest that it could increase the detection sensitivity of searches for neutral hydrogen emission at moderately high redshifts.

Additional Information

© 2012 Astronomical Society of Australia. Received 2011 September 8, accepted 2011 November 30, published online 2011 December 19. We thank Dr. B. Koribalski for helpful comments. This publication makes use of data products from the Wide-Field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration.

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