利用MACE(主要大气切伦科夫实验)对蟹状星云的观测
高能天体物理现象
2024-04-03 v1 高能物理 - 实验
摘要
主要大气切伦科夫实验(MACE)是一个大型(21米)成像大气切伦科夫望远镜(IACT),安装在印度北部拉达克汉勒海拔4270米处。本文报告了从蟹状星云探测到能量高于80 GeV的甚高能(VHE)伽马射线发射。我们分析了2022年11月至2023年2月期间在低天顶角收集的约15小时数据。能谱可以用对数抛物线函数很好地描述,在400 GeV处的流量约为(3.46 +/- 0.26stat) x 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到约5 TeV。能量分辨率从分析能量阈值80 GeV时的约34%改善到1 TeV以上的约21%。考虑到统计和系统不确定性,获得的蟹状星云每日光变曲线和能谱分布与之前的测量结果一致。
引用
@article{arxiv.2404.01649,
title = {Observations of the Crab Nebula with MACE (Major Atmospheric Cherenkov Experiment)},
author = {Borwankar C. and Sharma M. and Hariharan J. and Venugopal K. and Godambe S. and Mankuzhyil N. and Chandra P. and Khurana M. and Pathania A. and Chouhan N. and Dhar V. K. and Thubstan R. and Norlha S. and Keshavananda and Sarkar D. and Dar Z. A. and Kotwal S. V. and Godiyal S. and Kushwaha C. P. and Singh K. K. and Das M. P. and Tolamatti A. and Ghosal B. and Chanchalani K. and Pandey P. and Bhatt N. and Bhattcharyya S. and Sahayanathan S. and Koul M. K. and Dorjey P. and Dorji N. and Chitnis V. R. and Tickoo A. K. and Rannot R. C. and Yadav K. K},
journal= {arXiv preprint arXiv:2404.01649},
year = {2024}
}
备注
Accepted for publication in Astroparticle Physics