Probing for Leptonic Signatures from GRB030329 with AMANDA-II
Probing for Leptonic Signatures from GRB030329 with AMANDA-II
复制标题
使用 AMANDA-II 探测 GRB030329 的轻子特征
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Clarke
中科院分区：
文献类型：
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作者：
M. Stamatikos;Jenny Kurtzweil;M. Clarke
来自伽马射线暴(GRB)的高能(TeV-PeV)中微子的发现，将通过确认相对论喷流中的强子加速，揭示它们的内在微观物理；可能揭示最高能量宇宙射线的加速机制。我们描述了一个基于火球现象与地面和卫星观测GRB030329的对峙的三个模型的分析，这触发了高能瞬变探测器(HETE-II)。与以前的漫射搜索相反，模型1和模型2分别基于各向同性和束状发射几何结构，预期的离散Muon中微子能谱是直接从瞬发伽马射线光子能谱的火球描述推导出来的，其光谱拟合参数由带函数表征，以及基于相关的光学瞬变(OT)余辉的光谱观测红移。为了进行比较，我们还考虑了一个基于平均爆发参数和各向同性发射的模型(3)。利用严格的空间和时间限制(以电磁观测为基础)，结合单一、稳健的选择标准(为发现而优化)，利用南极Muon和中微子探测器阵列(阿曼达-II)的存档数据，实现了几乎无背景、标称信号损失的搜索。我们的初步结果与零信号探测是一致的，在2PeV时，模型1的Muon中微子有效面积约为80m^2，通量上限约为0.150 GeV/cm^2/S。对冰立方的预测与文献结果进行了比较。讨论了相关搜索的含义
The discovery of high-energy (TeV-PeV) neutrinos from gamma-ray bursts (GRBs) would shed light on their intrinsic microphysics by confirming hadronic acceleration in the relativistic jet; possibly revealing an acceleration mechanism for the highest energy cosmic rays. We describe an analysis featuring three models based upon confronting the fireball phenomenology with ground-based and satellite observations of GRB030329, which triggered the High Energy Transient Explorer (HETE-II). Contrary to previous diffuse searches, the expected discrete muon neutrino energy spectra for models 1 and 2, based upon an isotropic and beamed emission geometry, respectively, are directly derived from the fireball description of the prompt gamma-ray photon energy spectrum, whose spectral fit parameters are characterized by the Band function, and the spectroscopically observed redshift, based upon the associated optical transient (OT) afterglow. For comparison, we also consider a model (3) based upon averaged burst parameters and isotropic emission. Strict spatial and temporal constraints (based upon electromagnetic observations), in conjunction with a single, robust selection criterion (optimized for discovery) have been leveraged to realize a nearly background-free search, with nominal signal loss, using archived data from the Antarctic Muon and Neutrino Detector Array (AMANDA-II). Our preliminary results are consistent with a null signal detection, with a peak muon neutrino effective area of ~80 m^2 at ~2 PeV and a flux upper limit of ~0.150 GeV/cm^2/s for model 1. Predictions for IceCube, AMANDA's kilometer scale successor, are compared with those found in the literature. Implications for correlative searches are discussed