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200 papers

The present generation of radio telescopes, combined with powerful new spectrometers, is opening a new age of redshifted radio absorption-line studies. Outfitting of arrays of antennas, such as the European VLBI Network and the upgraded…

Astrophysics · Physics 2007-05-23 F. H. Briggs

We introduce a new survey to map the radio continuum halos of a sample of 35 edge-on spiral galaxies at 1.5 GHz and 6 GHz in all polarization products. The survey is exploiting the new wide bandwidth capabilities of the Karl G. Jansky Very…

The US Naval Research Laboratory (NRL) and the National Radio Astronomy Observatory (NRAO) have collaborated to develop, install, and commission a new commensal system on the Karl G. Jansky Very Large Array (VLA). The VLA Low Band…

Instrumentation and Methods for Astrophysics · Physics 2016-03-11 Tracy Clarke , Namir Kassim , Emil Polisensky , Wendy Peters , Simona Giacintucci , Scott D. Hyman

Observing nearby galaxies would facilitate the search for artificial radio signals by sampling many billions of stars simultaneously, but few efforts have been made to exploit this opportunity. An added attraction is that the Milky Way is…

Earth and Planetary Astrophysics · Physics 2018-01-09 Robert H. Gray , Kunal P. Mooley

We describe an "active" antenna system for HF/VHF (long wavelength) radio astronomy that has been successfully deployed 256-fold as the first station (LWA1) of the planned Long Wavelength Array. The antenna system, consisting of crossed…

The past decade has seen the rise of various radio astronomy arrays, particularly for low-frequency observations below 100MHz. These developments have been primarily driven by interesting and fundamental scientific questions, such as…

Instrumentation and Methods for Astrophysics · Physics 2016-01-28 Raj Thilak Rajan , Albert-Jan Boonstra , Mark Bentum , Marc Klein-Wolt , Frederik Belien , Michel Arts , Noah Saks , Alle-Jan van der Veen

The Cherenkov Telescope Array (CTA) is the next generation high-energy gamma-ray observatory. It will improve the sensitivity of current instruments up to an order of magnitude, while providing energy coverage for photons from 20 GeV to at…

High Energy Astrophysical Phenomena · Physics 2019-07-18 Fabian Schüssler

The Atacama Large Millimeter/submillimeter Array (ALMA), and the Jansky Very Large Array (JVLA) have recently begun probing the Universe. Both provide the largest collecting area available at locations on a high dry site, endowing them with…

Instrumentation and Methods for Astrophysics · Physics 2015-06-04 Alwyn Wootten

Extremely large-scale antenna arrays (ELAA) play a critical role in enabling the functionalities of next generation wireless communication systems. However, as the number of antennas increases, ELAA systems face significant bottlenecks,…

Information Theory · Computer Science 2025-02-10 Yanqing Xu , Erik G. Larsson , Eduard A. Jorswieck , Xiao Li , Shi Jin , Tsung-Hui Chang

We have observed the Extended Chandra Deep Field South (E-CDF-S) using a mosaic of six deep Very Large Array (VLA) pointings at 1.4GHz. In this paper, we present the survey strategy, description of the observations, and the first data…

The East Asian VLBI Network (EAVN) is an international VLBI facility in East Asia and is operated under mutual collaboration between East Asian countries, as well as part of Southeast Asian and European countries. EAVN currently consists of…

Instrumentation and Methods for Astrophysics · Physics 2022-12-15 Kazunori Akiyama , Juan-Carlos Algaba , Tao An , Keiichi Asada , Kitiyanee Asanok , Do-Young Byun , Thanapol Chanapote , Wen Chen , Zhong Chen , Xiaopeng Cheng , James O. Chibueze , Ilje Cho , Se-Hyung Cho , Hyun-Soo Chung , Lang Cui , Yuzhu Cui , Akihiro Doi , Jian Dong , Kenta Fujisawa , Wei Gou , Wen Guo , Kazuhiro Hada , Yoshiaki Hagiwara , Tomoya Hirota , Jeffrey A. Hodgson , Mareki Honma , Hiroshi Imai , Phrudth Jaroenjittichai , Wu Jiang , Yongbin Jiang , Yongchen Jiang , Takaaki Jike , Dong-Kyu Jung , Taehyun Jung , Noriyuki Kawaguchi , Dong-Jin Kim , Hyo-Ryoung Kim , Jaeheon Kim , Jeong-Sook Kim , Kee-Tae Kim , Soon-Wook Kim , Motoki Kino , Hideyuki Kobayashi , Shoko Koyama , Busaba H. Kramer , Jee-Won Lee , Jeong Ae Lee , Sang-Sung Lee , Sang Won Lee , Bin Li , Guanghui Li , Xiaofei Li , Zhixuan Li , Qinghui Liu , Xiang Liu , Ru-Sen Lu , Kazuhito Motogi , Masanori Nakamura , Kotaro Niinuma , Chungsik Oh , Hongjong Oh , Junghwan Oh , Se-Jin Oh , Tomoaki Oyama , Jongho Park , Saran Poshyachinda , Hyunwook Ro , Duk-Gyoo Roh , Wiphu Rujopakarn , Nobuyuki Sakai , Satoko Sawada-Satoh , Zhi-Qiang Shen , Katsunori M. Shibata , Bong Won Sohn , Boonrucksar Soonthornthum , Koichiro Sugiyama , Yunxia Sun , Mieko Takamura , Yoshihiro Tanabe , Fumie Tazaki , Sascha Trippe , Kiyoaki Wajima , Jinqing Wang , Na Wang , Shiqiang Wang , Xuezheng Wang , Bo Xia , Shuangjing Xu , Hao Yan , Wenjun Yang , Jae-Hwan Yeom , Kunwoo Yi , Sang-Oh Yi , Yoshinori Yonekura , Hasu Yoon , Linfeng Yu , Jianping Yuan , Youngjoo Yun , Bo Zhang , Hua Zhang , Yingkang Zhang , Guang-Yao Zhao , Rongbing Zhao , Weiye Zhong

The planned Cherenkov Telescope Array (CTA), a future ground-based Very-High-Energy (VHE) gamma-ray observatory, will be the largest project of its kind. It aims to provide an order of magnitude increase in sensitivity compared to currently…

The very long baseline interferometry (VLBI) technique offers angular resolutions superior to any other instruments at other wavelengths, enabling unique science applications of high-resolution imaging of radio sources and high-precision…

Instrumentation and Methods for Astrophysics · Physics 2018-02-06 T. An , B. W. Sohn , H. Imai

Extremely large-scale antenna array (ELAA) technologies consisting of ultra-massive multiple-input-multiple-output (UM-MIMO) or reconfigurable intelligent surfaces (RISs), are emerging to meet the demand of wireless systems in…

Information Theory · Computer Science 2024-02-06 Yiqin Wang , Shu Sun , Chong Han

A next generation atmospheric Cherenkov observatory is described based on the Whipple Observatory $\gamma$-ray telescope. A total of nine such imaging telescopes will be deployed in an array that will permit the maximum versatility and give…

Here we describe the Compact Array Broadband Backend (CABB) and present first results obtained with the upgraded Australia Telescope Compact Array (ATCA). The 16-fold increase in observing bandwidth, from 2 x 128 MHz to 2 x 2048 MHz, high…

The application of VLBI to scientific problems has undergone a relentless expansion since its conception, yet the potential for further expansion is still large. We are on the cusp of revolutionary progress given the arrival of a host of…

Instrumentation and Methods for Astrophysics · Physics 2023-05-03 María J. Rioja , Richard Dodson

Over the next few years the new radio telescopes, such as the Low Frequency Array (LOFAR) will greatly enhance our knowledge of the active history of the Universe. Large-area surveys with these new telescopes will no longer be dominated by…

Astrophysics · Physics 2007-05-23 Matt J. Jarvis

The Very Small Array (VSA) is a synthesis telescope designed to image faint structures in the cosmic microwave background on degree and sub-degree angular scales. The VSA has key differences from other CMB interferometers with the result…

The Cherenkov Telescope Array (CTA) will be the next generation of ground-based instrument for Very High Energy gamma-ray astronomy. It will improve the sensitivity of current telescopes by up to an order of magnitude and provide energy…

Instrumentation and Methods for Astrophysics · Physics 2017-09-04 P. Cumani , T. Hassan , L. Arrabito , K. Bernlöhr , J. Bregeon , G. Maier , A. Moralejo