The First LHAASO Catalog of Gamma-Ray Sources
We present the first catalog of very-high energy and ultra-high energy γ-ray sources detected by the Large High Altitude Air Shower Observatory (LHAASO), 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 Kilometer Squared 3 Array (KM2A) from January 2020 to September 2022. This catalog represents the most sensitive E > 1 TeV gamma-ray survey of the sky covering declination from −20◦ to 80◦. In total, the catalog contains 90 sources with extended size smaller than 2◦ and with significance of detection at > 5σ. For each source, we provide its position, extension and spectral characteristics. Furthermore, based on our source association criteria, 32 new TeV sources are proposed in this study. Additionally, 43 sources are detected with ultra-high energy (E > 100 TeV) emission at > 4σ significance level.
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Gamma-Ray , university , galaxy
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National Astronomical Data Center