Search for gamma-ray sources in the LAT sky with the Minimal Spanning Tree algorithm

Details Search for gamma-ray sources in the LAT sky with the Minimal Spanning Tree algorithm Search for gamma-ray sources in the LAT sky with the Minimal Spanning Tree algorithm

2009-12-18

arxiv.org/abs/0912.3843v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

3 pages, 3 figures, 2009 Fermi Symposium, eConf Proceedings C091122

Scientific paper

We present the topometric MST method to search for clusters of photons in the LAT sky, which was used to obtain the seed list for the compilation of the First LAT catalog. This method works well in non-dense field and can be profitably used at energies higher than a few GeV. We describe the particular techniques developed by us to improve the cluster selection criteria and the estimate of the astronomical coordinates of the possibly associated gamma-ray sources. A simulation technique to evaluate the confidence level of the source detectionis presented.

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