EDP Sciences
Free access
Volume 454, Number 3, August II 2006
Page(s) 997 - 1009
Section Instruments, observational techniques, and data processing
DOI http://dx.doi.org/10.1051/0004-6361:20053498

A&A 454, 997-1009 (2006)
DOI: 10.1051/0004-6361:20053498

Matched filters for source detection in the Poissonian noise regime

I. M. Stewart1, 2

1  Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK
2  Jodrell Bank Observatory, University of Manchester, Macclesfield SK11 9DL, UK
    e-mail: ims@jb.man.ac.uk

(Received 23 May 2005 / Accepted 9 February 2006)

A procedure is described for estimating an optimum kernel for the detection by convolution of signals among Poissonian noise. The technique is applied to the detection of X-ray point sources in XMM-Newton data, and is shown to yield an improvement in detection sensitivity of up to 60% over the sliding-box method used in the creation of the 1XMM catalog.

Key words: methods: data analysis -- techniques: image processing -- X-rays: general

© ESO 2006