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Periodicity Search on X-Ray Bursts of SGR J1935+2154 Using 8.5 yr of Fermi/GBM Data 期刊论文  OAI收割
The Astrophysical Journal, 2021, 卷号: 923, 页码: L30
作者:  HXMT
  |  收藏  |  浏览/下载：16/0  |  提交时间：2022/02/08
Insight-HXMT's continued observation plan for SGR J1935+2154 ATEL  OAI收割
2020
作者:  Zhang, S. -N.;  Li, X. -B.;  Li, C. -K.;  Ge, M. -Y.;  Xiong, S. -L.
  |  收藏  |  浏览/下载：39/0  |  提交时间：2020/07/03
Geocentric time correction for Insight-HXMT detection of the x-ray counterpart of the FRB by CHIME and STARE2 from SGR 1935+2154 ATEL  OAI收割
2020
作者:  Zhang, S. -N.;  Li, C. -K.;  Zheng, S. -J.;  Li, X. -B.;  Tuo, Y. -L.
  |  收藏  |  浏览/下载：161/0  |  提交时间：2020/07/03
Insight-HXMT X-ray and hard X-ray upper limits to the radio burst detected by FAST from SGR 1935+2154 ATEL  OAI收割
2020
作者:  Li, C. K.;  Tuo, Y. L.;  Ge, M. Y.;  Li, X. B.;  Liao, J. Y.
  |  收藏  |  浏览/下载：34/0  |  提交时间：2020/07/03
Insight-HXMT X-ray and hard X-ray detection of the double peaks of the Fast Radio Burst from SGR 1935+2154 ATEL  OAI收割
2020
作者:  Zhang, S. -N.;  Xiong, S. -L.;  Li, C. -K.;  Li, X. -B.;  Tuo, Y. -L.
  |  收藏  |  浏览/下载：49/0  |  提交时间：2020/07/03
Update on Insight-HXMT detection of a bright short x-ray counterpart of the Fast Radio Burst from SGR 1935+2154: No intrinsic delay between radio and X-ray flares ATEL  OAI收割
2020
作者:  Zhang, S. -N.;  Zhang, B. and Lu, W. -B.
  |  收藏  |  浏览/下载：13/0  |  提交时间：2020/07/03
Insight-HXMT detection of a bright short x-ray counterpart of the Fast Radio Burst from SGR 1935+2154 ATEL  OAI收割
2020
作者:  Zhang, S. -N.;  Tuo, Y. -L.;  Xiong, S. -L.;  Li, C. -K.;  Xiao, S.
  |  收藏  |  浏览/下载：45/0  |  提交时间：2020/07/03
No pulsed radio emission during a bursting phase of a Galactic magnetar 期刊论文  OAI收割
Nature, 2020, 卷号: 587, 页码: 63-65
作者:  HXMT
  |  收藏  |  浏览/下载：37/0  |  提交时间：2022/02/08
Astrophysics - High Energy Astrophysical Phenomena  Abstract: Fast radio bursts (FRBs) are millisecond-duration radio transients of unknown physical origin observed at extragalactic distances1-3. It has long been speculated that magnetars are the engine powering repeating bursts from FRB sources4-13, but no convincing evidence has been collected so far14. Recently, the Galactic magnetar SRG 1935+2154 entered an active phase by emitting intense soft íray bursts15. One FRB-like event with two peaks (FRB 200428) and a luminosity slightly lower than the faintest extragalactic FRBs was detected from the source, in association with a soft íray/hard-X-ray flare18-21. Here we report an eight-hour targeted radio observational campaign comprising four sessions and assisted by multi-wavelength (optical and hard-X-ray) data. During the third session, 29 soft-íray repeater (SGR) bursts were detected in íray energies. Throughout the observing period, we detected no single dispersed pulsed emission coincident with the arrivals of SGR bursts, but unfortunately we were not observing when the FRB was detected. The non-detection places a fluence upper limit that is eight orders of magnitude lower than the fluence of FRB 200428. Our results suggest that FRB-SGR burst associations are rare. FRBs may be highly relativistic and geometrically beamed, or FRB-like events associated with SGR bursts may have narrow spectra and characteristic frequencies outside the observed band. It is also possible that the physical conditions required to achieve coherent radiation in SGR bursts are difficult to satisfy, and that only under extreme conditions could an FRB be associated with an SGR burst.  
Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文  OAI收割
The Astrophysical Journal, 2020, 卷号: 901, 页码: L7
作者:  HXMT
  |  收藏  |  浏览/下载：16/0  |  提交时间：2022/02/08
Radio transient sources  Magnetars  Soft gamma-ray repeaters  2008  992  1471  Astrophysics - High Energy Astrophysical Phenomena  Astrophysics - Instrumentation and Methods for Astrophysics  Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of AJ = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 1014 Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to RNIR ? 0.025 (fluence index ?0.35).  
Stellar reaction rate of Ni-55(p, gamma)Cu-56 in Type I X-ray bursts 期刊论文  OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2019, 卷号: 30, 期号: 9, 页码: 9
作者:  Ma, Shao-Bo;  Zhang, Li-Yong;  Hu, Jun
  |  收藏  |  浏览/下载：48/0  |  提交时间：2019/11/10