机构

• 紫金山天文台 [3]
• 高能物理研究所 [1]
• 新疆天文台 [1]

采集方式

• OAI收割 [5]

内容类型

• 期刊论文 [5]

发表日期

• 2022 [1]
• 2020 [1]
• 2008 [1]
• 2007 [2]

学科主题

• Physics [2]
• Astronomy ... [1]

筛选

浏览/检索结果: 共5条，第1-5条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 The Solar Activity Monitor Network - SAMNet 期刊论文  OAI收割 Journal of Space Weather and Space Climate, 2022, 卷号: 12, 页码: 212 作者:  Erdelyi, Robertus;  Korsos, Marianna B.;  Huang, Xin;  Yang, Yong;  Pizzey, Danielle   |  收藏  |  浏览/下载：9/0  |  提交时间：2023/06/19 Sun  flares  precursors  magneto-optical filter  space weather  flare  doppler  fields  instrument  prediction  velocity  line  sun  Astronomy & Astrophysics  Geochemistry & Geophysics  Meteorology &  Atmospheric Sciences   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：44/0  |  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.   The early X-ray/optical flares of gamma-ray bursts 期刊论文  OAI收割 GAMMA-RAY BURSTS 2008 (AIP Conference Proceedings ), 2008, 卷号: 1065, 页码: 149-154 Wei D. M. 收藏  |  浏览/下载：20/0  |  提交时间：2011/12/30 INTERNAL SHOCKS  OPTICAL FLARE  GRB 990123  1ST SURVEY  SWIFT  AFTERGLOWS  EMISSION  FLASHES  MODEL   Simultaneous observations of second and sub-second time structures in H-alpha, radio and hard X-ray data due to the periodical particle acceleration and MHD waves in the November 1, 2004 flare 期刊论文  OAI收割 ASTROPHYSICS AND SPACE SCIENCE, 2007, 卷号: 312, 期号: 1-2, 页码: 127-138 作者:  Huang Guangli;  Ji Haisheng 收藏  |  浏览/下载：14/0  |  提交时间：2012/02/05 solar radio  optical  X-ray  flare  fluctuations   Central engine afterglow of Gamma-ray Bursts 期刊论文  OAI收割 ASTROPHYSICS OF COMPACT OBJECTS  (AIP Conference Proceedings ), 2007, 卷号: 968, 页码: 32-35 Fan Yi-Zhong; Piran Tsvi; Wei Da-Ming 收藏  |  浏览/下载：21/0  |  提交时间：2012/02/05 OPTICAL FLARE  LIGHT CURVES  EMISSION  SHOCK  GRB-011121  ONSET  MODEL