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Fast radio bursts (FRBs) are millisecond-duration radio flashes of extragalactic origin, with magnetars implicated as viable central engines. Yet their triggering and radiation mechanisms remain unknown. Radio telescopes inevitably record…

High Energy Astrophysical Phenomena · Physics 2026-02-27 Chen-Ran Hu , Yong-Feng Huang , Jin-Jun Geng , Chen Deng , Ze-Cheng Zou , Xiao-Fei Dong , Yi-Dan Wang , Pei Wang , Fan Xu , Lang Cui , Song-Bo Zhang , Xue-Feng Wu

Very long baseline interferometry (VLBI) technique allows us to determine positions of thousands of radio sources using the absolute astrometry approach. I have investigated the impact of a selection of observing frequencies in a range from…

Instrumentation and Methods for Astrophysics · Physics 2024-05-14 Leonid Petrov

When comparing modern fundamental reference frames in the radio (International Celestial Reference Frame) and optical (Gaia), a couple of bright radio reference sources appear to have very large radio-optical offsets, from tens up to…

Astrophysics of Galaxies · Physics 2025-01-14 S. Frey , O. Titov , A. Melnikov , S. Lambert

We introduce the cross spectrum based FRB (Fast Radio Burst) search method for VLBI observation. This method optimizes the fringe fitting scheme in geodetic VLBI data post processing, which fully utilizes the cross spectrum fringe phase…

Instrumentation and Methods for Astrophysics · Physics 2018-02-06 Lei Liu , Fengxian Tong , Weimin Zheng , Juan Zhang , Li Tong

We present the largest compilation to date of optical observations during and following fast radio bursts (FRBs). The data set includes our dedicated simultaneous and follow-up observations, as well as serendipitous archival survey…

Fast radio bursts (FRBs) are bright, millisecond-duration radio bursts with poorly known origins. Most FRB sources are detected only once, while some are repeaters. Variation patterns observed in the rotation measure (RM) of some repeaters…

High Energy Astrophysical Phenomena · Physics 2026-02-16 Ying-ze Shan , Wei-Hua Lei , Hao-Tian Lan , Shao-yu Fu , Jumpei Takata , Yuan-chuan Zou , Jia-xin Liu , Long-xuan Zhang , Tong-lun Wang , Fa-Yin Wang

VLBI astrometry allows coordinates of celestial radio sources to be determined with submilliarcsecond accuracy. In particular, with differential VLBI astrometry, the standard errors of relative positions and proper motions can be as small…

Astrophysics · Physics 2007-05-23 Norbert Bartel

We present a detection of a bright burst from FRB 20201124A, which is one of the most active repeating FRBs, based on S-band observations with the 64-m radio telescope at the Usuda Deep Space Center/JAXA. This is the first FRB observed by…

Fast radio bursts (FRBs) are fierce radio flashes from the deep sky. Abundant observations have indicated that highly magnetized neutron stars might be involved in these energetic bursts, but the underlying trigger mechanism is still…

The NRAO Very Long Baseline Array (VLBA) was used at 1.4 GHz to image 20 compact sources in the inner 1-degree radius of the Spitzer VLA First-Look Survey. Twelve sources were detected with the VLBA, with peak flux densities above 2 mJy at…

Astrophysics · Physics 2009-11-10 J. M. Wrobel , M. A. Garrett , J. J. Condon , R. Morganti

The total event number of fast radio bursts (FRBs) is accumulating rapidly with the improvement of existing radio telescopes and the completion of new facilities. Especially, the Five-hundred-meter Aperture Spherical radio Telescope (FAST)…

High Energy Astrophysical Phenomena · Physics 2022-01-12 Di Xiao , Zi-Gao Dai

Over 700 bright millisecond-duration radio transients, known as Fast Radio Bursts (FRBs), have been identified to date. Nevertheless, the origin of FRBs remains unknown. The two repeating FRBs (FRB 20121102A and FRB 20190520B) have been…

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…

Instrumentation and Methods for Astrophysics · Physics 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

The origin and phenomenology of the Fast Radio Burst (FRB) remains unknown despite more than a decade of efforts. Though several models have been proposed to explain the observed data, none is able to explain alone the variety of events so…

High Energy Astrophysical Phenomena · Physics 2021-03-26 Luciano Nicastro , Cristiano Guidorzi , Eliana Palazzi , Luca Zampieri , Massimo Turatto , Angela Gardini

Fast Radio Bursts (FRBs) are millisecond-duration radio pulses originating from cosmological distances, as indicated by their large dispersion measures. While numerous FRBs have now been localised to their host galaxies, a distinct class of…

High Energy Astrophysical Phenomena · Physics 2025-12-03 Thulo Letsele , Lebogang Mfulwane , Christo Venter , James O. Chibueze , Mechiel Christiaan Bezuidenhout

Some short gamma-ray bursts (SGRBs) are thought to be caused by the mergers of binary neutron stars which may sometimes produce massive neutron star remnants capable of producing extragalactic fast radio bursts (FRBs). We conducted a deep…

The detection of six Fast Radio Bursts (FRBs) has recently been reported. FRBs are short duration ($\sim$ 1 ms), highly dispersed radio pulses from astronomical sources. The physical interpretation for the FRBs remains unclear but is…

High Energy Astrophysical Phenomena · Physics 2015-06-19 Divya Palaniswamy , Randall B. Wayth , Cathryn M. Trott , Jamie N. McCallum , Steven J. Tingay , Cormac Reynolds

Fast radio bursts (FRBs) are millisecond-duration, extragalactic radio flashes of unknown physical origin. FRB 121102, the only known repeating FRB source, has been localized to a star-forming region in a dwarf galaxy at redshift z = 0.193,…