Source Detection in Simulated XMM-Newton Observations
msra(2002)
摘要
We present preliminary results from our on-going study: Comparing and
optimizing source detection procedures for XMM images. By constructing
realistic spatial and spectral source distributions and ``observing'' these
through the XMM Science Simulator we study how source characteristics and
instrumental effects influence detection. We are currently undertaking a
statistical analysis on the outcome of running source detection algorithms on
the simulated EPIC pn and MOS images in various energy bands. Particular
emphasis is on the efficiency and reliability for detecting the faint, extended
emission from distant clusters of galaxies. Here we present simulated EPIC
images applicable to the XMM Large-scale Structure Survey (10 ksec pointings of
``blank fields''). However, we emphasize that our procedure is flexible,
including as many realistic source characteristics and instrumental effects as
possible, and yet modest in computational demand. As such it can be used for
simulating XMM data obtained from virtually any X-ray source. All simulation
products are made available at our website (http://www.astro.ku.dk/xcosmos/).
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关键词
cluster of galaxies,astrophysics,statistical analysis
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