Optimal Multiwavelength Source Detection: Experience Gained from the WISE Mission

Details Optimal Multiwavelength Source Detection: Experience Gained from the WISE Mission Optimal Multiwavelength Source Detection: Experience Gained from the WISE Mission

2011-11-29

arxiv.org/abs/1111.7011v2

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

7 pages, 2 figures; accepted for publication in PASA. Formatting problem in Table 1 corrected

Scientific paper

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.

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