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Direct detection of the Dark Ages and the Epoch of Reionization (EOR) is among the main scientific objectives of all current and future low-frequency radio facilities. In this paper we summarize and discuss recent results, based on…

天体物理学 · 物理学 2008-11-26 Ilian T. Iliev , Garrelt Mellema , Ue-Li Pen , Paul R. Shapiro

The Large Observatory for X-ray Timing (LOFT) is one of the four candidate ESA M3 missions considered for launch in the time-frame of 2022. It is specifically designed to perform fast X-ray timing and probe the status of the matter near…

天体物理仪器与方法 · 物理学 2015-06-11 S. Suchy , P. Uter , C. Tenzer , A. Santangelo , A. Argan , M. Feroci , T. E. Kennedy , P. J. Smith , D. Walton , S. Zane , J. Portell , E. García-Berro

We present a new algorithm for stacking radio interferometric data in the uv-domain. The performance of uv-stacking is compared to the stacking of fully imaged data using simulated Atacama Large Millimeter/sub-millimeter Array (ALMA) and…

星系天体物理 · 物理学 2015-06-23 Lukas Lindroos , K. K. Knudsen , W. Vlemmings , J. Conway , I. Martí-Vidal

The Cherenkov Telescope Array Observatory (CTAO) will be a ground-based Cherenkov telescope performing wide-sky surveys, ideal for anisotropy studies such as cross-correlations with tracers of the cosmic large-scale structure.…

The VLA has been used at 8.3 GHz in the DnC and CnB array configurations to carry out an H92alpha recombination line study (at 8.3 GHz) of the ionized gas in the Arched Filaments H II complex, which defines the western edge of the Galactic…

天体物理学 · 物理学 2009-11-06 Cornelia C. Lang , W. M. Goss , Mark Morris

We report the detection of a potential cosmic radio transient source using the two stations of the Long Wavelength Array. The transient was detected on 18 October 2017 08:47 UTC near the celestial equator while reducing 10,240 hours of…

高能天体物理现象 · 物理学 2020-06-29 S. S. Varghese , K. S. Obenberger , J. Dowell , G. B. Taylor

To continue the unparalleled success of the Very Large Array (VLA) for radio astronomy, the facility is currently being converted to become the 'Expanded VLA' (EVLA). The EVLA will radically improve the VLA in order to cover the full…

天体物理学 · 物理学 2009-11-13 Juergen Ott , Rick Perley , Michael Rupen , the EVLA team

The auto-correlative weak-value amplification (AWVA) technique demonstrates distinct advantages over standard weak-value amplification (SWVA) for quantum parameter estimation. To achieve enhanced precision in real-time parameter estimation,…

量子物理 · 物理学 2025-07-25 Jing-Hui Huang , Guang-Jun Wang , Xiang-Yun Hu

We present a description of the Prototype All-Sky Imager (PASI), a backend correlator and imager of the first station of the Long Wavelength Array (LWA1). PASI cross-correlates a live stream of 260 dual-polarization dipole antennas of the…

天体物理仪器与方法 · 物理学 2015-03-18 K. S. Obenberger , G. B. Taylor , J. M. Hartman , T. E. Clarke , J. Dowell , A. Dubois , D. Dubois , P. A. Henning , J. Lazio , S. Michalak , F. K. Schinzel

Total-power radiometry with individual meter-wave antennas is a potentially effective way to study the Cosmic Dawn ($z\sim20$) through measurement of sky brightness arising from the $21$~cm transition of neutral hydrogen, provided this can…

天体物理仪器与方法 · 物理学 2021-05-26 Marta Spinelli , Gianni Bernardi , Hugh Garsden , Lincoln J. Greehill , Anastasia Fialkov , Jayce Dowell , Daniel C. Price

The Deep Synoptic Array 10 dish prototype is an instrument designed to detect and localise fast radio bursts with arcsecond accuracy in real time. Deployed at Owens Valley Radio Observatory, it consists of ten 4.5m diameter dishes, equipped…

天体物理仪器与方法 · 物理学 2019-08-21 J. Kocz , V. Ravi , M. Catha , L. D'Addario , G. Hallinan , R. Hobbs , S. Kulkarni , J. Shi , H. Vedantham , S. Weinreb , D. Woody

Backed by advances in digital electronics, signal processing, computation, and storage technologies, aperture arrays, which had strongly influenced the design of telescopes in the early years of radio astronomy, have made a comeback. Amid…

The Arcminute Microkelvin Imager (AMI) telescopes located at the Mullard Radio Astronomy Observatory near Cambridge have been significantly enhanced by the implementation of a new digital correlator with 1.2 MHz spectral resolution. This…

Proposed 21 cm cosmology observatories for studying the epoch of reionization (z ~6-15) and dark energy (z ~0-6) envision compact arrays with tens of thousands of antenna elements. Fully correlating this many elements is computationally…

天体物理学 · 物理学 2015-05-13 Miguel F. Morales

New observations of Jupiter's decametric radio emissions have been made with the Long Wavelength Array Station 1 (LWA1) which is capable of making high quality observations as low as 11 MHz. Full Stokes parameters were determined for…

Nonline of sight (NLOS) ultraviolet (UV) scattering communication can serve as a good candidate for outdoor optical wireless communication (OWC) in the cases of non-perfect transmitter-receiver alignment and radio silence. We design and…

系统与控制 · 电气工程与系统科学 2024-04-16 Yuchen Pan , Fei Long , Ping Li , Haotian Shi , Jiazhao Shi , Hanlin Xiao , Chen Gong , Zhengyuan Xu

We investigate the correlations in galaxy shapes between optical and radio wavelengths using archival observations of the COSMOS field. Cross-correlation studies between different wavebands will become increasingly important for precision…

星系天体物理 · 物理学 2016-12-19 Ben Tunbridge , Ian Harrison , Michael L. Brown

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…

天体物理仪器与方法 · 物理学 2016-03-11 Tracy Clarke , Namir Kassim , Emil Polisensky , Wendy Peters , Simona Giacintucci , Scott D. Hyman

We generate and transmit 75-GHz-bandwidth OFDM signals over the air using three mutually frequency-locked lasers, achieving minimal frequency gap between the wireless W and D bands using optical-assisted approaches, resulting in 173.5 Gb/s…

信号处理 · 电气工程与系统科学 2023-11-09 Zichuan Zhou , Amany Kassem , James Seddon , Eric Sillekens , Izzat Darwazeh , Polina Bayvel , Zhixin Liu