论文标题
Antares使用天体物理目录搜索中微子的点源:可能性堆叠分析
ANTARES search for point-sources of neutrinos using astrophysical catalogs: a likelihood stacking analysis
论文作者
论文摘要
提出了使用Antares检测器在2007年1月29日,2007年至2017年12月31日收集的数据来搜索类似天体物理点的中微子来源。一种似然堆叠方法用于评估过量的振子中微子的过量意义,该中微子与可能的来源列表相关,引起类似轨道的事件。 Different sets of objects are tested in the analysis: a) a sub-sample of the \textit{Fermi} 3LAC catalog of blazars, b) a jet-obscured AGN population, c) a sample of soft gamma-ray selected radio galaxies, d) a star-forming galaxy catalog , and e) a public sample of 56 very-high-energy track events from the IceCube experiment. 测试的来源均未显示与Antares检测到的中微子样品的显着关联。获得的最小p值是针对具有相同权重假设的射电星系目录获得的,其预审前的p值等于$ 2.8 \,σ$多余,相当于$ 1.6 \,σ$σ$。 此外,还报道了针对Blazar MG3 J225517+2409的专用分析的结果:发现该来源是\ textIt {Fermi} 3LAC样本中最重要的,其中5个Antares事件位于与源相距不到一个程度的Antares事件。这种Blazar在\ textIt {fermi}数据中显示了爆炸活性的证据,在时空重合与IceCube检测到的高能量轨道中。报告了Antares和IceCube数据组合的$ 2.0 \,σ$的\ emph {a后验}的意义。
A search for astrophysical point-like neutrino sources using the data collected by the ANTARES detector between January 29, 2007 and December 31, 2017 is presented. A likelihood stacking method is used to assess the significance of an excess of muon neutrinos inducing track-like events in correlation with the location of a list of possible sources. Different sets of objects are tested in the analysis: a) a sub-sample of the \textit{Fermi} 3LAC catalog of blazars, b) a jet-obscured AGN population, c) a sample of soft gamma-ray selected radio galaxies, d) a star-forming galaxy catalog , and e) a public sample of 56 very-high-energy track events from the IceCube experiment. None of the tested sources shows a significant association with the sample of neutrinos detected by ANTARES. The smallest p-value is obtained for the radio galaxies catalog with an equal weights hypothesis, with a pre-trial p-value equivalent to a $2.8 \, σ$ excess, equivalent to $1.6 \, σ$ post-trial. In addition, the results of a dedicated analysis for the blazar MG3 J225517+2409 are also reported: this source is found to be the most significant within the \textit{Fermi} 3LAC sample, with 5 ANTARES events located at less than one degree from the source. This blazar showed evidence of flaring activity in \textit{Fermi} data, in space-time coincidence with a high-energy track detected by IceCube. An \emph{a posteriori} significance of $2.0\, σ$ for the combination of ANTARES and IceCube data is reported.