Insight-HXMT X-ray and hard X-ray upper limits to the radio burst detected by FAST from SGR 1935+2154
Insight-HXMT X-ray and hard X-ray upper limits to the radio burst detected by FAST from SGR 1935+2154
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发表时间：
2020-05
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通讯作者：
C. K. Li;Y. Tuo;M. Ge;X. Li;J. Liao;C. Cai;S. Xiong;C. Liu;Y. Chen;X. Cao;T. Li;S. Jia;J. Nie;F. Lu;L. Song;M. Wu;Y. Xu;S. Zhang;L. Lin;B. Zhang;Insight-HXMT team
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作者：
C. K. Li;Y. Tuo;M. Ge;X. Li;J. Liao;C. Cai;S. Xiong;C. Liu;Y. Chen;X. Cao;T. Li;S. Jia;J. Nie;F. Lu;L. Song;M. Wu;Y. Xu;S. Zhang;L. Lin;B. Zhang;Insight-HXMT team
在FAST （ATel #13699）报告的高极化射电暴事件触发时间（T0=2020-04-30T21:43:00.5 UTC）前后，Insight-HXMT正在对SGR 1935+2154进行ToO观测，没有被地球任何掩星。在T0 +/- 50秒内，在Insight-HXMT LE (1-10 keV)， ME（10-30 keV）和HE （27-250 keV）光曲线的搜索中没有发现显著的过量事件（信噪比bbb3 sigma）。假设与我们在ATel #13687中报道的x射线对应的光谱模型相同，并且从SGR1935+2154的位置进行1秒时间尺度（1秒），3西格玛通量上限如下：模型：wabs*Cutoffpl (nH=2.6,PhoIndex=1.44, Ecut=69.8 keV): LE: 2.68e-09 erg cm^-2 ME: 3.45e-09 erg cm^-2 HE: 4.46e-09 erg cm^-2 Insight-HXMT将继续用LE， ME和HE观测SGR1935+2154，直到2020-05-06 01:20:47 UT。Insight-HXMT是中国首个空间x射线望远镜，由中国国家航天局（CNSA）和中国科学院（CAS）联合资助。更多信息可在http://www.hxmt.org找到。
Around the trigger time (T0=2020-04-30T21:43:00.5 UTC) of the highly polarised radio burst event reported by FAST (ATel #13699), Insight-HXMT was carrying out the ToO observation of SGR 1935+2154 without any occultation by the Earth. Within T0 +/- 50 s, no significant excess events (SNR > 3 sigma) are found in a search of the Insight-HXMT LE (1-10 keV), ME(10-30 keV) and HE (27-250 keV) light curves. Assuming the same spectral model to the X-ray counterpart that we reported in ATel #13687, and with one second timescale (1 s) coming from the position of SGR1935+2154, the 3-sigma fluence upper-limits are as following: Model: wabs*Cutoffpl (nH=2.6,PhoIndex=1.44, Ecut=69.8 keV): LE: 2.68e-09 erg cm^-2 ME: 3.45e-09 erg cm^-2 HE: 4.46e-09 erg cm^-2 Insight-HXMT will continue to observe SGR 1935+2154 with LE, ME and HE until 2020-05-06 01:20:47 UT. Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information could be found at: http://www.hxmt.org.