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Fast radio bursts (FRBs) which are well localised ($<$1") to their host galaxy are tools for studying cosmology and the intergalactic medium. Furthermore, high-time resolution datasets of their polarisation properties can enable testing of…

天体物理仪器与方法 · 物理学 2026-05-11 M. Glowacki , T. Dial , A. Bera , A. T. Deller , K. Gourdji , A. Jaini , D. Scott , Y. Wang , K. Desnos , A. C. Gordon , R. L. Davies , R. M. Shannon

We present high resolution (arcsecond or better) observations made with the Karl G. Jansky Very Large Array of 123 radio-loud quasars with redshifts in the range $2.5 \leq z \leq 5.28$ that form a complete flux limited sample ($\geq 70$ mJy…

星系天体物理 · 物理学 2014-06-19 Doug B. Gobeille , John F. C. Wardle , C. C. Cheung

High-precision optical pulse trains distribution via fibre links has made huge impacts in many fields. In most published works, the accuracies are still fundamentally limited by some unavoidable noises, such as thermal and shot noise from…

光学 · 物理学 2014-02-25 B. Ning , S. Y. Zhang , D. Hou , J. T. Wu , Z. B. Li , J. Y. Zhao

Very long baseline interferometric (VLBI) localisations of repeating fast radio bursts (FRBs) have demonstrated a diversity of local environments: from nearby star-forming regions to globular clusters. Here we report the VLBI localisation…

The Large European Array for Pulsars (LEAP) is an experiment that harvests the collective power of Europe's largest radio telescopes in order to increase the sensitivity of high-precision pulsar timing. As part of the ongoing effort of the…

天体物理仪器与方法 · 物理学 2016-01-27 C. G. Bassa , G. H. Janssen , R. Karuppusamy , M. Kramer , K. J. Lee , K. Liu , J. McKee , D. Perrodin , M. Purver , S. Sanidas , R. Smits , B. W. Stappers

We present a new image of the 5.5 GHz radio emission from the extended Chandra Deep Field South. Deep radio observations at 5.5 GHz were obtained in 2010 and presented in the first data release. A further 76 hours of integration has since…

星系天体物理 · 物理学 2015-10-07 M. T. Huynh , M. E. Bell , A. M. Hopkins , R. P. Norris , N. Seymour

Radio searches for extraterrestrial intelligence have mainly targeted the discovery of narrowband continuous-wave beacons and artificially dispersed broadband bursts. Periodic pulse trains, in comparison to the above technosignature…

The Murchison Widefield Array (MWA) is an electronically steered low frequency ($<300$\,MHz) radio interferometer, with a `slew' time less than 8seconds. Low frequency ($\sim 100$\,MHz) radio telescopes are ideally suited for rapid-response…

At the IceCube Neutrino Observatory, a Surface Array Enhancement is planned, consisting of 32 hybrid stations, placed within the current IceTop footprint. This surface enhancement will considerably increase the detection sensitivity to…

高能天体物理现象 · 物理学 2021-07-22 Marie Oehler , Roxanne Turcotte-Tardif

We report preliminary results of a visual inspection of ~4300 deg$^2$ covered by 4414 images of the 3-GHz VLA Sky Survey (VLASS, epoch 1.1) in search of extended radio structures. Over 7600 positions were registered, and for a subset of 270…

星系天体物理 · 物理学 2018-08-23 Agueda C. Villarreal Hernández , Heinz Andernach

The Five-hundred-meter Aperture Spherical radio Telescope (FAST) is the most sensitive telescope at the $L$-band (1.0-1.5 GHz) and has been used to carry out the FAST Galactic Plane Pulsar Snapshot (GPPS) survey in the last 5 yr. Up to now,…

高能天体物理现象 · 物理学 2025-02-03 J. L. Han , D. J. Zhou , C. Wang , W. Q. Su , Yi Yan , W. C. Jing , Z. L. Yang , P. F. Wang , T. Wang , J. Xu , N. N. Cai , J. H. Sun , Q. L. Yang , R. X. Xu , H. G. Wang , X. P. You

The detection of astrophysical Gamma-Ray Bursts (GRBs) has always been intertwined with the challenge of identifying the direction of the source. Accurate angular localization of better than a degree has been achieved to date only with…

天体物理仪器与方法 · 物理学 2021-02-25 Roi Rahin , Luca Moleri , Alex Vdovin , Amir Feigenboim , Solomon Margolin , Shlomit Tarem , Ehud Behar , Max Ghelman , Alon Osovizky

We have used the Karl G. Jansky Very Large Array to image ~100 sq. deg. of SDSS Stripe 82 at 1-2 GHz. The survey consists of 1,026 snapshot observations of 2.5 minutes duration, using the hybrid CnB configuration. The survey has good…

Traditionally, fast radio transient searches are conducted on dedispersed time series using thresholding techniques based on the statistical properties of the data. However, peaks in dedispersed time series do not directly provide…

天体物理仪器与方法 · 物理学 2025-11-25 Sergio Belmonte Diaz , Rene P. Breton , Zafiirah Hosenie , Ben W. Stappers

A new pulsar signal-processing pipeline has been developed for observing pulsars with the Diamond Array Radio Telescope at the Gauribidanur radio observatory. The array consists of 32 off-axis dual-polarised LPDAs, with a nominal gain of 22…

天体物理仪器与方法 · 物理学 2026-02-03 Arul Pandian B , Joydeep Bagchi , Prabu Thiagaraj , K. B. Raghavendra Rao , Vinutha Chandrashekar

Pulsar timing array projects are carrying out high precision observations of millisecond pulsars with the aim of detecting ultra-low frequency (~ 10^{-9} to 10^{-8} Hz) gravitational waves. We show how unambiguous detections of such waves…

太阳与恒星天体物理 · 物理学 2015-05-19 George Hobbs

The radio-wavelength detection of extensive air showers (EAS) initiated by cosmic-ray interactions in the Earth's atmosphere is a promising technique for investigating the origin of these particles and the physics of their interactions. The…

天体物理仪器与方法 · 物理学 2021-03-29 A. Williamson , C. W. James , S. J. Tingay , S. J. McSweeney , S. M. Ord

Machine learning is a useful tool for identifying radio pulses from cosmic-ray air showers and for cleaning such pulses from radio background. This can lower the detection threshold and increase the accuracy for the pulse time and…

天体物理仪器与方法 · 物理学 2025-02-28 Frank G. Schroeder , Abdul Rehman
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