A fast radio burst associated with a Galactic magnetar.
Christopher D. Bochenek,Vikram Ravi,Konstantin Belov,Gregg Hallinan,Jonathon Kocz,Jonathon Kocz,Shri Kulkarni,D. McKenna +7 more
TLDR
A millisecond-duration radio burst from the Galactic magnetar SGR-1935+2154 with a fluence of 1.5 ± 0.3 megajansky milliseconds was detected by the STARE2 radio array in the 1,281-1,468 megahertz band.Abstract:
Since their discovery in 20071, much effort has been devoted to uncovering the sources of the extragalactic, millisecond-duration fast radio bursts (FRBs)2. A class of neutron stars known as magnetars is a leading candidate source of FRBs3,4. Magnetars have surface magnetic fields in excess of 1014 gauss, the decay of which powers a range of high-energy phenomena5. Here we report observations of a millisecond-duration radio burst from the Galactic magnetar SGR 1935+2154, with a fluence of 1.5 ± 0.3 megajansky milliseconds. This event, FRB 200428 (ST 200428A), was detected on 28 April 2020 by the STARE2 radio array6 in the 1,281–1,468 megahertz band. The isotropic-equivalent energy released in FRB 200428 is 4 × 103 times greater than that of any radio pulse from the Crab pulsar—previously the source of the brightest Galactic radio bursts observed on similar timescales7. FRB 200428 is just 30 times less energetic than the weakest extragalactic FRB observed so far8, and is drawn from the same population as the observed FRB sample. The coincidence of FRB 200428 with an X-ray burst9–11 favours emission models that describe synchrotron masers or electromagnetic pulses powered by magnetar bursts and giant flares3,4,12,13. The discovery of FRB 200428 implies that active magnetars such as SGR 1935+2154 can produce FRBs at extragalactic distances. Observations of the fast radio burst FRB 200428 coinciding with X-rays from the Galactic magnetar SGR 1935+2154 indicate that active magnetars can produce fast radio bursts at extragalactic distances.read more
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Multiband Detection of Repeating FRB 20180916B
TL;DR: In this article , the authors presented a multiband study of FRB 20180916B, a repeating source with a 16.3 day periodicity, and reported the detection of four, one, and seven bursts from observations spanning 3 days using the upgraded Giant Metrewave Radio Telescope (300-500 MHz), the Canadian Hydrogen Intensity Mapping Experiment (400-800 MHz) and the Green Bank Telescope (600-1000 MHz), respectively.
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Prospects for Detecting Fast Radio Bursts in the Globular Clusters of Nearby Galaxies
TL;DR: In this paper , the authors explore the white dwarf merger scenario using a suite of N-body cluster models, focusing in particular on such mergers in M87's clusters, and find M87 is the best candidate for FRB detections.
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Where are the magnetar binary companions? Candidates from a comparison with binary population synthesis predictions
A. Chrimes,Andrew Levin,A. S. Fruchter,Paul J. Groot,Peter G. Jonker,Chryssa Kouveliotou,J. D. Lyman,Elizabeth R. Stanway,Nial R. Tanvir,K. Wiersema +9 more
TL;DR: In this article , the authors used the deep Hubble Space Telescope imaging to search for bound stellar companions to magnetars and found two candidates for stellar companions associated with CXOU J171405.7-381031 and SGR 0755-2933, based on their absolute magnitudes and colours.
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Deep Simultaneous Limits on Optical Emission from FRB 20190520B by 24.4 fps Observations with Tomo-e Gozen
Yuu Niino,Mamoru Doi,Shigeyuki Sako,Ryou Ohsawa,Noriaki Arima,Jiachen Jiang,Nozomu Tominaga,Masaomi Tanaka,Di Li,C. H. Niu,Chao-Wei Tsai,T. Kobayashi,Hidenori Takahashi,Sohei Kondo,Yuki Mori,Tsutomu Toki,Ko Arimatsu,Toshihiro Kasuga,Shin-ichiro Okumura +18 more
TL;DR: In this article , the authors obtained optical fluence limits as deep as 0.068 Jy ms for the individual bursts of a repeating fast radio burst (FRB) 20190520B using Tomo-e Gozen, a high-speed CMOS camera mounted on the Kiso 105 cm Schmidt telescope, simultaneously with radio observations carried out using the Five-hundredm Aperture Spherical radio Telescope (FAST).
Journal ArticleDOI
High-energy gamma-ray emission from SNR G57.2+0.8 hosting SGR J1935+2154
TL;DR: In this paper, the contribution of supernova remnants (SNRs) to high energy and very high energy gamma-ray (VHE, $E > 100$ GeV) emission due to cosmic-ray acceleration from SNR G57.2+0.8 and SGR J1935+2154 with the use of the GALPROP code is analyzed.
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