Enhanced Wavdetect: Carrying Out Source Detection In Multi-look Observations

Details Enhanced Wavdetect: Carrying Out Source Detection In Multi-look Observations Enhanced Wavdetect: Carrying Out Source Detection In Multi-look Observations

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21822827k&link_type=abstract

American Astronomical Society, AAS Meeting #218, #228.27; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

A fundamental limitation of current source detection algorithms is that they can only run on one observation dataset at a time. We have developed an enhancement to CIAO WAVDETECT that lets us to carry out source detection on combined datasets from multiple overlapping looks at the same region with different pointings. This improves the sensitivity of surveys, and allows us to detect weak sources in the full dataset that are below the detection threshold in each of the individual observations. Our method properly corrects for the varying sizes of the PSF, and thus limits the false detection rate.
We have applied this to a mosaic of multiple observations of CygOB2. We find that this process increases the number of detected sources by approximately 10% over standard runs of WAVDETECT.
This work was supported by CXC NASA contract NAS8-39073.

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