Search Results for author: J. P. McKean

Found 4 papers, 0 papers with code

Reducing false positives in strong lens detection through effective augmentation and ensemble learning

no code implementations20 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.

Data Augmentation Diversity +1

A machine learning based approach to gravitational lens identification with the International LOFAR Telescope

no code implementations21 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).

DECORAS: detection and characterization of radio-astronomical sources using deep learning

no code implementations19 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.

Decoder Position

Dissecting the Gravitational Lens B1608+656. I. Lens Potential Reconstruction

no code implementations17 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.

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