LHAASO伽马射线源星表 第一批数据

使用2021年3月至2022年9月水切伦科夫探测器阵列（WCDA）收集的508天数据和2020年1月至2022年9月平方公里阵列（KM2A）记录的933天数据，我们展示了高海拔宇宙线观测站（LHAASO）探测到的第一个甚高能和超高能γ射线源目录。该目录代表了赤纬−20◦ 至80◦天空覆盖范围内，对最敏感的E>1TeV伽马射线测量。目录总共包含90个扩展大小小于2◦的源 ，每个源的显著性要求＞5σ。对于每个源，我们提供其位置、扩展和光谱特性。此外，基于我们的源关联标准，本研究提出了32个新的TeV源。此外，本目录包含43个超高能γ射线源，E>100 TeV辐射的显著性水平>4σ。

Using 508 days of data collected by the Water Cherenkov Detector Array (WCDA) from March 2021 to September 2022 and 933 days of data recorded by the Square Kilometre Array (KM2A) from January 2020 to September 2022, we present the first catalog of very-high-energy (VHE) and ultra-high-energy (UHE) gamma-ray sources detected by the Large High Altitude Air Shower Observatory (LHAASO). This catalog corresponds to the most sensitive measurements of gamma-rays with energy E > 1 TeV across the sky spanning declinations from -20° to 80°. The catalog contains a total of 90 sources with angular extension size less than 2°, each with a detection significance greater than 5σ. For each source, we provide its position, extension, and spectral properties. Additionally, based on our source association criteria, this study reports 32 new TeV sources. Furthermore, the catalog includes 43 ultra-high-energy gamma-ray sources, whose emission at E > 100 TeV has a significance level exceeding 4σ.

搜集汇总

背景与挑战

背景概述

该数据集是高海拔宇宙线观测站（LHAASO）探测到的第一个甚高能和超高能γ射线源目录，包含90个扩展大小小于2◦的源，其中32个为新的TeV源，43个为超高能γ射线源。数据覆盖赤纬−20◦至80◦天空范围，对E>1TeV伽马射线测量最敏感。