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This work proposes a saliency-based attribution framework to evaluate and compare 10 state-of-the-art explainability methods for deep learning models in astronomy, focusing on the classification of radio galaxy images. While previous work…

天体物理仪器与方法 · 物理学 2025-02-25 M. T. Atemkeng , C. Chuma , S. Zaza , C. D. Nunhokee , O. M. Smirnov

We apply a new deep learning technique to detect, classify, and deblend sources in multi-band astronomical images. We train and evaluate the performance of an artificial neural network built on the Mask R-CNN image processing framework, a…

天体物理仪器与方法 · 物理学 2019-11-22 Colin J. Burke , Patrick D. Aleo , Yu-Ching Chen , Xin Liu , John R. Peterson , Glenn H. Sembroski , Joshua Yao-Yu Lin

Morphology is a powerful indicator of a galaxy's dynamical and merger history. It is strongly correlated with many physical parameters, including mass, star formation history and the distribution of mass. The Galaxy Zoo project collected…

We propose a new deep learning approach for medical imaging that copes with the problem of a small training set, the main bottleneck of deep learning, and apply it for classification of healthy and cancer cells acquired by quantitative…

图像与视频处理 · 电气工程与系统科学 2018-12-31 Moran Rubin , Omer Stein , Nir A. Turko , Yoav Nygate , Darina Roitshtain , Lidor Karako , Itay Barnea , Raja Giryes , Natan T. Shaked

Deep learning has recently been successfully applied in automatic modulation classification by extracting and classifying radio features in an end-to-end way. However, deep learning-based radio modulation classifiers are lack of…

机器学习 · 计算机科学 2021-01-19 Liang Huang , You Zhang , Weijian Pan , Jinyin Chen , Li Ping Qian , Yuan Wu

We present visual-like morphologies over 16 photometric bands, from ultra-violet to near infrared, for 8,412 galaxies in the Cluster Lensing And Supernova survey with Hubble (CLASH) obtained by a convolutional neural network (CNN) model.…

Radio surveys are widely used to study active galactic nuclei. Radio interferometric observations typically trade-off surface brightness sensitivity for angular resolution. Hence, observations using a wide range of baseline lengths are…

星系天体物理 · 物理学 2019-06-11 Nina Glaser , O Ivy Wong , Kevin Schawinski , Ce Zhang

We present the largest visually selected sample of extended ($>$60 arcsec) radio-loud active galactic nuclei (RLAGN) to date, based on the LOw-Frequency Array Two-Metre Sky Survey second data release (LoTSS DR2). From the broader LoTSS DR2…

The goal of this work is to determine the nature of the relation between morphology and accretion mode in radio galaxies, including environmental parameters. The CoNFIG extended catalogue (improved by new Ks-band identifications and…

宇宙学与河外天体物理 · 物理学 2015-06-12 Melanie A. Gendre , P. N. Best , J. V. Wall , L. M. Ker

In this work, we investigate the feasibility and effectiveness of employing deep learning algorithms for automatic recognition of the modulation type of received wireless communication signals from subsampled data. Recent work considered a…

信号处理 · 电气工程与系统科学 2019-01-18 Sharan Ramjee , Shengtai Ju , Diyu Yang , Xiaoyu Liu , Aly El Gamal , Yonina C. Eldar

In order to study the status and the possible evolution of clusters of galaxies at intermediate redshifts (z ~ 0.1 - 0.3), as well as their spatial correlation and relationship with the local environment, we built a sample of candidate…

天体物理学 · 物理学 2009-11-07 A. Zanichelli , M. Vigotti , R. Scaramella , G. Grueff , G. Vettolani

Blazars are a highly-variable, radio-loud subclass of active galactic nuclei (AGN). In order to better understand such objects we must be able to easily identify candidate blazars from the growing population of unidentified sources. Working…

高能天体物理现象 · 物理学 2015-06-16 Philip S. Cowperthwaite , F. Massaro , R. D'Abrusco , A. Paggi , G. Tosti , Howard A. Smith

An Artificial Neural Network (ANN) has been employed using a supervised back-propagation scheme to classify 2000 bright sources from the Calgary database of IRAS (Infrared Astronomy Satellite) spectra in the wavelength region of 8-23…

天体物理学 · 物理学 2009-11-10 Ranjan Gupta , Harinder P. Singh , K. Volk , S. Kwok

Image registration is used in many medical image analysis applications, such as tracking the motion of tissue in cardiac images, where cardiac kinematics can be an indicator of tissue health. Registration is a challenging problem for deep…

图像与视频处理 · 电气工程与系统科学 2025-06-25 Benjamin Graham

We have obtained a deep radio image with the Very Large Array at 6 cm in the Lockman Hole. The noise level in the central part of the field is about 11 microJy. From these data we have extracted a catalogue of 63 radio sources. The analysis…

天体物理学 · 物理学 2009-11-07 P. Ciliegi , G. Zamorani , G. Hasinger , I. Lehmann , G. P. Szokoly , G. Wilson

Subject to intricate environmental variables, the precise classification of jamming signals holds paramount significance in the effective implementation of anti-jamming strategies within communication systems. In light of this imperative,…

信号处理 · 电气工程与系统科学 2024-06-27 Xuhui Ding , Yue Zhang , Gaoyang Li , Xiaozheng Gao , Neng Ye , Dusit Niyato , Kai Yang

Creating radio galaxy catalogues from next-generation deep surveys requires automated identification of associated components of extended sources and their corresponding infrared hosts. In this paper, we introduce RadioGalaxyNET, a…

天体物理仪器与方法 · 物理学 2023-12-04 Nikhel Gupta , Zeeshan Hayder , Ray P. Norris , Minh Huynh , Lars Petersson

Giant radio halos (RH) are Mpc-scale synchrotron sources detected in a significant fraction of massive and merging galaxy clusters.Their statistical properties can be used to discriminate among various models for their origin. Theoretical…

宇宙学与河外天体物理 · 物理学 2015-06-11 R. Cassano , G. Brunetti , Ray P. Norris , H. J. A. Roettgering , M. Johnston-Hollitt , M. Trasatti

We present a systematic search for radio active galactic nuclei (AGNs) in dwarf galaxies using recent observations taken by the Very Large Array Sky Survey (VLASS). To select these objects, we first establish a criterion to identify…

星系天体物理 · 物理学 2024-11-25 John-Michael Eberhard , Amy E. Reines , Hansung B. Gim , Jeremy Darling , Jenny E. Greene

Deconvolution, imaging and calibration of data from radio interferometers is a challenging computational (inverse) problem. The upcoming generation of radio telescopes poses significant challenges to existing, and well proven data reduction…

天体物理仪器与方法 · 物理学 2025-06-18 Hendrik Müller , Sanjay Bhatnagar