no code implementations • 20 Feb 2025 • Samira Rezaei, Amirmohammad Chegeni, Bharath Chowdhary Nagam, J. P. McKean, Mitra Baratchi, Koen Kuijken, Léon V. E. Koopmans
Our experiments, employing variations of DenseNet and EfficientNet, achieved a best false positive rate (FP rate) of $10^{-4}$, while successfully identifying over 88 per cent of genuine gravitational lenses in the test dataset.
no code implementations • 21 Jul 2022 • S. Rezaei, J. P. McKean, M. Biehl, W. de Roo1, A. Lafontaine
We present a novel machine learning based approach for detecting galaxy-scale gravitational lenses from interferometric data, specifically those taken with the International LOFAR Telescope (ILT), which is observing the northern radio sky at a frequency of 150 MHz, an angular resolution of 350 mas and a sensitivity of 90 uJy beam-1 (1 sigma).
no code implementations • 19 Sep 2021 • S. Rezaei, J. P. McKean, M. Biehl, A. Javadpour
In addition, DECORAS performs source characterization in terms of the position, effective radius and peak brightness of the detected sources.
no code implementations • 17 Apr 2008 • S. H. Suyu, P. J. Marshall, R. D. Blandford, C. D. Fassnacht, L. V. E. Koopmans, J. P. McKean, T. Treu
We present a pixelated approach to modeling simultaneously the lens potential and source intensity of strong gravitational lens systems with extended source-intensity distributions.