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arXiv 2404.01649astro-ph.HEhep-ex
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利用MACE(大型大气切伦科夫实验)对蟹状星云的观测

Observations of the Crab Nebula with MACE (Major Atmospheric Cherenkov Experiment)

Borwankar C., Sharma M., Hariharan J., Venugopal K., Godambe S., Mankuzhyil N., Chandra P., Khurana M., Pathania A., Chouhan N., Dhar V. K., Thubstan R., Norlha… 展开作者

Borwankar C., Sharma M., Hariharan J., Venugopal K., Godambe S., Mankuzhyil N., Chandra P., Khurana M., Pathania A., Chouhan N., Dhar V. K., Thubstan R., Norlha S., Keshavananda, Sarkar D., Dar Z. A., Kotwal S. V., Godiyal S., Kushwaha C. P., Singh K. K., Das M. P., Tolamatti A., Ghosal B., Chanchalani K., Pandey P., Bhatt N., Bhattcharyya S., Sahayanathan S., Koul M. K., Dorjey P., Dorji N., Chitnis V. R., Tickoo A. K., Rannot R. C., Yadav K. K

AI总结:

本文报告了MACE望远镜对蟹状星云80 GeV至约5 TeV甚高能伽马射线的探测结果,给出了对数抛物线能谱参数,并验证了其光变曲线和能谱分布与已有测量一致。

摘要:

大型大气切伦科夫实验(MACE)是一台大口径(21米)成像大气切伦科夫望远镜(IACT),安装于印度北部拉达克汉勒海拔4270米处。本文报告了在80 GeV以上对蟹状星云甚高能(VHE)伽马射线辐射的探测结果。我们分析了2022年11月至2023年2月期间在低天顶角条件下收集的约15小时数据。能谱可由对数抛物线函数很好地描述,在400 GeV处通量约为(3.46 ± 0.26stat) × 10⁻¹⁰ TeV⁻¹ cm⁻² s⁻¹,谱指数为2.09 ± 0.06stat,曲率参数为0.08 ± 0.07stat。伽马射线的探测能量范围从80 GeV延伸至约5 TeV。能量分辨率从分析能量阈值80 GeV处的约34%改善至1 TeV以上的约21%。在考虑统计和系统不确定性的情况下,所获得的蟹状星云日变光变曲线和光谱能量分布与先前测量结果一致。

英文摘要:

The Major Atmospheric Cherenkov Experiment (MACE) is a large size (21m) Imaging Atmospheric Cherenkov Telescope (IACT) installed at an altitude of 4270m above sea level at Hanle, Ladakh in northern India. Here we report the detection of Very High Energy (VHE) gamma-ray emission from Crab Nebula above 80 GeV. We analysed ~15 hours of data collected at low zenith angle between November 2022 and February 2023. The energy spectrum is well described by a log-parabola function with a flux of ~(3.46 +/- 0.26stat) x 10-10 TeV-1 cm-2 s-1, at 400 GeV with spectral index of 2.09 +/- 0.06stat and a curvature parameter of 0.08 +/- 0.07stat. The gamma-rays are detected in an energy range spanning from 80 GeV to ~5 TeV. The energy resolution improves from ~34% at an analysis energy threshold of 80 GeV to ~21% above 1 TeV. The daily light curve and the spectral energy distribution obtained for the Crab Nebula is in agreement with previous measurements, considering statistical and systematic uncertainties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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