Automatic detection of arcs and arclets formed by gravitational lensing

Details Automatic detection of arcs and arclets formed by gravitational lensing Automatic detection of arcs and arclets formed by gravitational lensing

2003-11-25

arxiv.org/abs/astro-ph/0311554v1

Astron.Astrophys. 416 (2004) 391-401

Astronomy and Astrophysics

Astrophysics

A&A in press, 12 pages, 16 figures

Scientific paper

10.1051/0004-6361:20034619

We present an algorithm developed particularly to detect gravitationally lensed arcs in clusters of galaxies. This algorithm is suited for automated surveys as well as individual arc detections. New methods are used for image smoothing and source detection. The smoothing is performed by so-called anisotropic diffusion, which maintains the shape of the arcs and does not disperse them. The algorithm is much more efficient in detecting arcs than other source finding algorithms and the detection by eye.

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