English
Related papers

Related papers: Identification of multi-component LOFAR sources wi…

200 papers

The amount of high-dimensional large-scale RNA sequencing data derived from multiple heterogeneous sources has increased exponentially in biological science. During data collection, significant technical noise or errors may occur. To…

Applications · Statistics 2025-06-24 Xiaolu Jiang , Wei Liu

The presence of large-scale magnetic fields and ultra-relativistic electrons in the intra-cluster medium (ICM) is confirmed through the detection of diffuse radio synchrotron sources, so-called radio halos and relics. Due to their…

We present the astrometric identification of 80 known radio pulsars as unresolved continuum sources detected at 144 MHz in the second data release of the LOFAR Two-metre Sky Survey (LoTSS DR2), which covers 27% of the Northern hemisphere.…

High Energy Astrophysical Phenomena · Physics 2026-02-18 G. A. C. Rijkers , C. G. Bassa , J. R. Callingham , T. Shimwell

The Low Frequency Array (LOFAR) is an ideal instrument to conduct deep extragalactic surveys. It has a large field of view and is sensitive to large scale and compact emission. It is, however, very challenging to synthesize thermal noise…

We present the detection of 68 sources from the most sensitive radio survey in circular polarisation conducted to date. We use the second data release of the 144 MHz LOFAR Two-metre Sky Survey to produce circularly-polarised maps with…

Many problems in real-world applications involve predicting several random variables which are statistically related. Markov random fields (MRFs) are a great mathematical tool to encode such relationships. The goal of this paper is to…

Machine Learning · Computer Science 2015-04-29 Liang-Chieh Chen , Alexander G. Schwing , Alan L. Yuille , Raquel Urtasun

The LOFAR Two-metre Sky Survey (LoTSS) will cover the full northern sky and, additionally, aims to observe the LoTSS deep fields to a noise level of ~10 microJy/bm over several tens of square degrees in areas that have the most extensive…

Identifying neutral hydrogen (\hi) galaxies from observational data is a significant challenge in \hi\ galaxy surveys. With the advancement of observational technology, especially with the advent of large-scale telescope projects such as…

Computer Vision and Pattern Recognition · Computer Science 2024-11-22 Zihao Song , Huaxi Chen , Donghui Quan , Di Li , Yinghui Zheng , Shulei Ni , Yunchuan Chen , Yun Zheng

The third data release of the LOFAR Two-metre Sky Survey provides an unprecedented view of the northern sky at 144 MHz. While compact sources can be efficiently identified with automated software packages, the detection of diffuse radio…

The Lockman Hole Project is a wide international collaboration aimed at exploiting the multi-band extensive and deep information available for the Lockman Hole region, with the aim of better characterizing the physical and evolutionary…

Astrophysics of Galaxies · Physics 2019-08-14 Elizabeth K. Mahony , Raffaella Morganti , Isabella Prandoni , Ilse van Bemmel

As radio telescopes increase in sensitivity and flexibility, so do their complexity and data-rates. For this reason automated system health management approaches are becoming increasingly critical to ensure nominal telescope operations. We…

Instrumentation and Methods for Astrophysics · Physics 2023-12-13 Michael Mesarcik , Albert-Jan Boonstra , Marco Iacobelli , Elena Ranguelova , Cees de Laat , Rob van Nieuwpoort

How to visually localize multiple sound sources in unconstrained videos is a formidable problem, especially when lack of the pairwise sound-object annotations. To solve this problem, we develop a two-stage audiovisual learning framework…

Computer Vision and Pattern Recognition · Computer Science 2020-07-15 Rui Qian , Di Hu , Heinrich Dinkel , Mengyue Wu , Ning Xu , Weiyao Lin

Radio-frequency (RF) front-end forms a critical part of any radio system, defining its cost as well as communication performance. However, these components frequently exhibit non-ideal behavior, referred to as impairments, due to the…

Signal Processing · Electrical Eng. & Systems 2024-10-28 Mehmet Ali Aygul , Ebubekir Memisoglu , Huseyin Arslan

LOFAR is the only radio telescope that is presently capable of high-sensitivity, high-resolution (<1 mJy/b and <15") observations at ultra-low frequencies (<100 MHz). To utilise these capabilities, the LOFAR Surveys Key Science Project is…

Separating an audio scene into isolated sources is a fundamental problem in computer audition, analogous to image segmentation in visual scene analysis. Source separation systems based on deep learning are currently the most successful…

Sound · Computer Science 2018-11-07 Prem Seetharaman , Gordon Wichern , Jonathan Le Roux , Bryan Pardo

Radio observations of strongly lensed objects are valuable as cosmological probes. Lensed radio sources have proven difficult to identify in large part due to the limited depth and angular resolution of the previous generation of radio sky…

Astrophysics of Galaxies · Physics 2025-01-07 Michael N. Martinez , Yjan A. Gordon , Keith Bechtol , Gillian Cartwright , Peter S. Ferguson , Miranda Gorsuch

We designed and implemented a deep learning based RF signal classifier on the Field Programmable Gate Array (FPGA) of an embedded software-defined radio platform, DeepRadio, that classifies the signals received through the RF front end to…

Networking and Internet Architecture · Computer Science 2019-10-15 Sohraab Soltani , Yalin E. Sagduyu , Raqibul Hasan , Kemal Davaslioglu , Hongmei Deng , Tugba Erpek

This work focuses on reliable detection of bird sound emissions as recorded in the open field. Acoustic detection of avian sounds can be used for the automatized monitoring of multiple bird taxa and querying in long-term recordings for…

Sound · Computer Science 2016-09-28 Ilyas Potamitis

Sound sources localization using multichannel signal processing has been a subject of active research for decades. In recent years, the use of deep learning in audio signal processing has allowed to drastically improve performances for…

Audio and Speech Processing · Electrical Eng. & Systems 2021-06-16 Hadrien Pujol , Éric Bavu , Alexandre Garcia