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At optical/ultraviolet energies, blazars display an underlying thermal (unpolarized) contribution from the accretion disc, torus and line emitting regions, diluting the polarized emission from the jet-component. Optical polarimetry can be…

The recent discoveries of a remarkable glitch/antiglitch accompanied by fast radio burst (FRB)-like bursts from the Galactic magnetar SGR J1935+2154 have revealed the physical connection between the two. In this work, we study the…

High Energy Astrophysical Phenomena · Physics 2024-05-14 Chong-Yu Gao , Jun-Jie Wei

Fast Radio Bursts (FRBs) are energetic phenomena that have significant implications for understanding fundamental physics and the universe. Recent observations of FRB 121102, FRB 20220912A, and FRB 20201124A by the Five-hundred-meter…

High Energy Astrophysical Phenomena · Physics 2024-11-07 Yan-Qi Du , Ping Wang , Li-Ming Song , Shao-Lin Xiong

Fast Radio Bursts (FRBs) are transient sources that emit a single radio pulse with a duration of only a few milliseconds. Since the discovery of the first FRB in 2007, tens of similar events have been detected. However, their physical…

High Energy Astrophysical Phenomena · Physics 2019-01-25 B. Marcote , Z. Paragi

The observed spectral shapes variation and tentative bimodal burst energy distribution (E-distribution) of fast radio burst (FRB) 20121102A with the FAST telescope are great puzzles. Adopting the published multifrequency data observed with…

High Energy Astrophysical Phenomena · Physics 2023-05-05 Fen Lyu , Ji-Gui Cheng , En-Wei Liang , Can-Min Deng , Tao An , Qing Lin

We present 2-4 GHz observations of polarized radio galaxies towards eight fast radio bursts (FRBs), producing grids of Faraday rotation measure (RM) sources with sky densities of 9-28 polarized sources per square degree. Using a Bayesian…

We present the science drivers for the Far-Infrared Enhanced Survey Spectrometer (FIRESS), one of two science instrument on the PRobe Infrared Mission for Astrophysics (PRIMA). FIRESS is designed to meet science objectives in the areas of…

While single-image super-resolution (SISR) has attracted substantial interest in recent years, the proposed approaches are limited to learning image priors in order to add high frequency details. In contrast, multi-frame super-resolution…

Computer Vision and Pattern Recognition · Computer Science 2021-04-07 Goutam Bhat , Martin Danelljan , Luc Van Gool , Radu Timofte

Recently, polarization angle (PA) orthogonal jumps over millisecond timescales were discovered from three bursts of a repeating fast radio burst source FRB 20201124A by the FAST telescope. In general, PA jumps can arise from the coherent or…

High Energy Astrophysical Phenomena · Physics 2025-12-03 Yuanhong Qu , Bing Zhang , Pawan Kumar

Fast radio bursts (FRBs) are extragalactic radio flashes of unknown physical origin. Their high luminosities and short durations require extreme energy densities, like those found in the vicinity of neutron stars and black holes. Studying…

The large-scale distribution of baryons is sensitive to gravitational collapse, mergers, and galactic feedback. Known as the Cosmic Web, its large-scale structure (LSS) can be classified as halos, filaments, and voids. Fast Radio Bursts…

Cosmology and Nongalactic Astrophysics · Physics 2024-03-18 Charles R. H. Walker , Laura G. Spitler , Yin-Zhe Ma , Cheng Cheng , M. Celeste Artale , Cameron Hummels

Fast radio bursts (FRBs) emit broad band radio wave radiation that may, in rare cases, encode atomic hydrogen (HI) absorption signals produced as they traverse the interstellar medium of their host galaxies. Combining such signals with high…

High Energy Astrophysical Phenomena · Physics 2026-02-12 Hugh Roxburgh , Marcin Glowacki , Apurba Bera , Clancy James

Context: in large-scale spatial surveys, the Point Spread Function (PSF) varies across the instrument field of view (FOV). Local measurements of the PSFs are given by the isolated stars images. Yet, these estimates may not be directly…

Computer Vision and Pattern Recognition · Computer Science 2016-11-04 F. M. Ngolè Mboula , J. -L. Starck , K. Okumura , J. Amiaux , P. Hudelot

We attract attention to the fact that the ultimate (shot-noise-limited) polarimetric sensitivity can be enhanced by orders of magnitude leaving the photon flux incident onto the photodetector on the same low level. This opportunity is of…

Mesoscale and Nanoscale Physics · Physics 2014-03-14 P. Glasenapp , A. Greilich , I. I. Ryzhov , V. S. Zapasskii , D. R. Yakovlev , G. G. Kozlov , M. Bayer

Fast radio bursts (FRB) can arise from synchrotron maser emission at ultra-relativistic magnetized shocks, such as produced by flare ejecta from young magnetars. We combine PIC simulation results for the synchrotron maser with the dynamics…

High Energy Astrophysical Phenomena · Physics 2019-04-10 Brian D. Metzger , Ben Margalit , Lorenzo Sironi

Fast radio bursts (FRBs) are short-duration and energetic radio transients of unknown origin. Observationally, they are commonly categorized into repeaters and non-repeaters. However, this binary classification may be influenced by…

Instrumentation and Methods for Astrophysics · Physics 2025-09-04 Liang Liu , Hai-Nan Lin , Li Tang

Some repeating fast radio burst (FRB) sources exhibit complex polarization behaviors, including frequency-dependent depolarization, variation of rotation measure (RM), and oscillating spectral structures of polarized components. Very…

High Energy Astrophysical Phenomena · Physics 2022-04-06 Yuan-Pei Yang , Wenbin Lu , Yi Feng , Bing Zhang , Di Li

Fast Radio Bursts (FRBs) are cosmological sub-second bursts of coherent radio emission, whose source is still unknown. To date, the galactic magnetar SGR 1935+2154 is the only astrophysical object known to emit radio bursts akin to FRBs,…

High Energy Astrophysical Phenomena · Physics 2024-07-08 Simone Dall'Osso , Riccardo La Placa , Luigi Stella , Pavel Bakala , Andrea Possenti

Since January 2017, the Commensal Real-time ASKAP Fast Transients survey (CRAFT) has been utilising commissioning antennas of the Australian SKA Pathfinder (ASKAP) to survey for fast radio bursts (FRBs) in fly's eye mode. This is the first…

Radiobursts exibiting fine structure observed over two years during the rising phase of Cycle 24 by the SBRS are analyzed. In five events zebra structure, various fiber bursts and fast pulsations were observed. Events on 15 and 24 February…

Solar and Stellar Astrophysics · Physics 2015-06-22 Gennady Chernov , Valery Fomichev , Baolin Tan , Yihua Yan , Chengming Tan , Qijun Fu