4.
Localisation and classification of gamma ray sources using neural networksChris van den Oetelaar,
Saptashwa Bhattacharyya,
Boris Panes,
Sascha Caron,
Gabrijela Zaharijas,
Roberto Ruiz de Austri,
Guõlaugur Jóhannesson, 2021, objavljeni znanstveni prispevek na konferenci
Opis: With limited statistics and spatial resolution of current detectors, accurately localising and separating gamma-ray point sources from the dominating interstellar emission in the GeV energy range is challenging. Motivated by the challenges of the traditional methods used for the gamma-ray source detection, here we demonstrate the application of deep learning based algorithms to automatically detect and classify point sources, which can be applied directly to the binned Fermi-LAT data and potentially be generalised to other wavelengths. For the point source detection task, we use popular deep neural network structure U-NET, together with image segmentation, for precise localisation of sources, various clustering algorithms were tested on the segmented images. The training samples are based on the source properties of AGNs and PSRs from the latest Fermi-LAT source catalog, in addition to the background interstellar emission. Finally, we have created a more
complex but robust training data generation exploiting full detector potential, increasing spatial resolution at the highest energies.
Ključne besede: gamma-rays, deep learning, computer vision
Objavljeno v RUNG: 01.10.2021; Ogledov: 1656; Prenosov: 42
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