INTEGRAL Discovery of a Burst with Associated Radio Emission from the Magnetar SGR 1935+2154

被引：276

作者：

Mereghetti, S. ^{[1
]}

Savchenko, V ^{[2
]}

Ferrigno, C. ^{[2
]}

Gotz, D. ^{[3
]}

Rigoselli, M. ^{[1
]}

Tiengo, A. ^{[4
]}

Bazzano, A. ^{[5
]}

Bozzo, E. ^{[2
]}

Coleiro, A. ^{[6
]}

Courvoisier, T. J-L ^{[2
]}

Doyle, M. ^{[7
]}

Goldwurm, A. ^{[6
]}

Hanlon, L. ^{[7
]}

Jourdain, E. ^{[8
,9
]}

von Kienlin, A. ^{[10
]}

Lutovinov, A. ^{[11
]}

Martin-Carrillo, A. ^{[7
]}

Molkov, S. ^{[11
]}

Natalucci, L. ^{[5
]}

Onori, F. ^{[5
]}

Panessa, F. ^{[5
]}

Rodi, J. ^{[5
]}

Rodriguez, J. ^{[3
]}

Sanchez-Fernandez, C. ^{[12
]}

Sunyaev, R. ^{[11
,13
]}

Ubertini, P. ^{[5
]}

机构：

[1] INAF Ist Astrofis Spaziale & Fis Cosm, Via A Corti 12, I-20133 Milan, Italy

[2] Univ Geneva, Dept Astron, ISDC, Chemin Ec 16, CH-1290 Versoix, Switzerland

[3] Univ Paris, Univ Paris Saclay, CNRS, AIM CEA,DRF,Irfu,Dept Astrophys, F-91191 Gif Sur Yvette, France

[4] Scuola Univ Super IUSS, Piazza Vittoria 15, I-27100 Pavia, Italy

[5] INAF Inst Space Astrophys & Planetol, Via Fosso del Cavaliere 100, I-00133 Rome, Italy

[6] Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CNRS,IN2P3,CEA,Irfu,APC,AstroParticule & Cosmol, 10 Rue Alice Domont & Leonie Duquet, F-75205 Paris 13, France

[7] Univ Coll Dublin, Sch Phys, Space Sci Grp, Dublin 4, Ireland

[8] IRAP, CNRS, 9 Av Colonel Roche,BP 44346, F-31028 Toulouse 4, France

[9] Univ Toulouse, IRAP, UPS OMP, Toulouse, France

[10] Max Planck Inst Extraterr Phys, Garching, Germany

[11] Russian Acad Sci, Space Res Inst, Profsoyuznaya 84-32, Moscow 117997, Russia

[12] European Space Astron Ctr ESA ESAC, Sci Operat Dept, E-28691 Madrid, Spain

[13] Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85741 Garching, Germany

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2020年 / 898卷 / 02期

基金：

欧盟地平线“2020”; 爱尔兰科学基金会;

关键词：

Magnetars; Soft gamma-ray repeaters; Interstellar scattering; Radio bursts; FLARE; IBIS; SPI;

D O I：

10.3847/2041-8213/aba2cf

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on International Gamma-Ray Astrophysics Laboratory (INTEGRAL) observations of the soft gamma-ray repeater SGR 1935+2154 performed between 2020 April 28 and May 3. Several short bursts with fluence of similar to 10(-7)-10(-6) erg cm(-2) were detected by the Imager on-board INTEGRAL (IBIS) instrument in the 20-200 keV range. The burst with the hardest spectrum, discovered and localized in real time by the INTEGRAL Burst Alert System, was spatially and temporally coincident with a short and very bright radio burst detected by the Canadian Hydrogen Intensity Mapping Experiment (CHIME) and Survey for Transient Astronomical Radio Emission 2 (STARE2) radio telescopes at 400-800 MHz and 1.4 GHz, respectively. Its lightcurve shows three narrow peaks separated by similar to 29 ms time intervals, superimposed on a broad pulse lasting similar to 0.6 s. The brightest peak had a delay of 6.5 +/- 1.0 ms with respect to the 1.4 GHz radio pulse (that coincides with the second and brightest component seen at lower frequencies). The burst spectrum, an exponentially cutoff power law with photon index Gamma = 0.7(-0.2)(+0.4) and peak energy E-p = 65 +/- 5 keV, is harder than those of the bursts usually observed from this and other magnetars. By the analysis of an expanding dust-scattering ring seen in X-rays with the Neil Gehrels Swift Observatory X-ray Telescope (XRT) instrument, we derived a distance of 4.4(-1.3)(+2.8) kpc for SGR 1935+2154, independent of its possible association with the supernova remnant G57.2+0.8. At this distance, the burst 20-200 keV fluence of (6.1 +/- 0.3) x 10(-7) erg cm(-2) corresponds to an isotropic emitted energy of similar to 1.4 x 10(39) erg. This is the first burst with a radio counterpart observed from a soft gamma-ray repeater and it strongly supports models based on magnetars that have been proposed for extragalactic fast radio bursts.

引用

页数：10

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