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New pulse profile variability associated with a glitch of PSR J0738-4042 期刊论文  OAI收割
Monthly Notices of the Royal Astronomical Society, 2022, 卷号: 519, 期号: 1, 页码: 74-84
作者:  Zhou, S. Q.;  Guegercinoglu, E.;  Yuan, J. P.;  Ge, M. Y.;  Yu, C.
  |  收藏  |  浏览/下载：16/0  |  提交时间：2023/06/19
On the Terrestrial Gamma Ray Flashes Preceding Narrow Bipolar Events 期刊论文  OAI收割
Geophysical Research Letters, 2021, 卷号: 48, 页码: e92160
作者:  HXMT
  |  收藏  |  浏览/下载：31/0  |  提交时间：2022/02/08
low frequency magnetic sferics  narrow bipolar events (NBEs)  relativistic feedback mechanism  Terrestrial Gamma ray Flashes (TGFs)  Abstract: Narrow bipolar events (NBEs) are occasionally reported to occur within a few ms after Terrestrial Gamma ray Flashes (TGFs), while the formation mechanism remains mysterious partially due to the lack of sufficient observations. Here, nine more TGFs of this scenario are reported with concurrent LF sferics and lightning location data. The gamma ray production in these TGFs preceded the occurrence of NBEs by a minimum of 60 µs up to 13.5 ms, and no other fast leader discharge was found within 20 ms before the TGF. The TGF preceded positive NBEs occurred at altitudes of 8.6-11 km in thunderstorms, likely in the high electric field (E field) region of lightning initiation. The analyses show that the NBE preceding TGFs bear harder energy spectrum with larger proportion of high energy photons than EIP related TGFs produced in association with lightning leader. Our findings support the relativistic feedback mechanism of gamma ray generation in the large scale thunderstorm E field.  
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：25/0  |  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).  
GRB 200415A: A Short Gamma-Ray Burst from a Magnetar Giant Flare? 期刊论文  OAI收割
The Astrophysical Journal, 2020, 卷号: 899, 页码: 106
作者:  HXMT
  |  收藏  |  浏览/下载：41/0  |  提交时间：2022/02/08
Gamma-ray bursts  Soft gamma-ray repeaters  Magnetars  Gamma-ray  transient sources  629  1441  992  1853  Astrophysics - High Energy  Astrophysical Phenomena  Abstract: The giant flares of soft gamma-ray repeaters (SGRs) have long been proposed to contribute to at least a subsample of the observed short gamma-ray bursts (GRBs). In this paper, we perform a comprehensive analysis of the high-energy data of the recent bright short GRB 200415A, which was located close to the Sculptor galaxy. Our results suggest that a magnetar giant flare provides the most natural explanation for most observational properties of GRB 200415A, including its location, temporal and spectral features, energy, statistical correlations, and high-energy emissions. On the other hand, the compact star merger GRB model is found to have difficulty reproducing such an event in a nearby distance. Future detections and follow-up observations of similar events are essential to firmly establish the connection between SGR giant flares and a subsample of nearby short GRBs.  
The THESEUS space mission concept: science case, design and expected performances 期刊论文  OAI收割
ADVANCES IN SPACE RESEARCH, 2018, 卷号: 62, 期号: 1, 页码: 191-244
作者:  Bulgarelli, A;  Bagoly, Z;  Rodic, T;  Renotte, E;  Orleanski, P
  |  收藏  |  浏览/下载：103/0  |  提交时间：2019/09/24
The core dominance parameter and Fermi detection of extragalactic radio sources 期刊论文  OAI收割
RESEARCH IN ASTRONOMY AND ASTROPHYSICS, 2016, 卷号: 16, 期号: 8, 页码: 118
作者:  Liu ZhenKuo;  Wu ZhongZu
  |  收藏  |  浏览/下载：27/0  |  提交时间：2021/12/06
Comparison between the time-integrated spectrum and the peak time spectrum of gamma-ray bursts and possible implications 期刊论文  OAI收割
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY, 2015, 卷号: 58, 期号: 3, 页码: 39501
作者:  Lyu Fen;  Wang YuanZhu;  Liang YunFeng;  Lin TingTing;  Hu YouDong
收藏  |  浏览/下载：41/0  |  提交时间：2015/12/03
Comparison between the time-integrated spectrum and the peak time spectrum of gamma-ray bursts and possible implications 期刊论文  OAI收割
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY, 2015, 卷号: 58, 期号: 3
作者:  Lyu Fen;  Wang YuanZhu;  Liang YunFeng;  Lin TingTing;  Hu YouDong
收藏  |  浏览/下载：42/0  |  提交时间：2016/05/18
THE TWO-POINT CORRELATION FUNCTION OF GAMMA-RAY BURSTS 期刊论文  OAI收割
ASTROPHYSICAL JOURNAL, 2015, 卷号: 807, 期号: 1, 页码: 76
作者:  Li, MH;  Lin HN(林海南);  Lin, HN
收藏  |  浏览/下载：27/0  |  提交时间：2016/04/18
The dark nature of GRB 130528A and its host galaxy 期刊论文  OAI收割
ASTRONOMY & ASTROPHYSICS, 2014, 卷号: 569
作者:  Jeong, S;  Castro-Tirado, AJ;  Bremer, M;  Winters, JM;  Gorosabel, J
收藏  |  浏览/下载：36/0  |  提交时间：2016/04/08