Xu Zunlei1; Duan Kaikai1; Shen Zhaoqiang1; Lei Shijun1; Dong Tiekuang1; Gargano Fabio2; Garrappa Simone3; Guo Dongya4; Jiang Wei1; Li Xiang1; Liang Yunfeng1; Mazziotta Mario Nicola2; Salinas Maria Fernanda Munoz5; Su Meng1; Vagelli Valerio3; Yuan Qiang1; Yue Chuan1; Zang Jingjing1; Zhang Yapeng6; Zhang Yunlong7; Zimmer Stephan5
Source Publicationresearchinastronomyandastrophysics
AbstractThe DArk Matter Particle Explorer(DAMPE),also known as Wukong in China,which was launched on 2015 December 17,is a new high energy cosmic ray and γ-ray satellite-borne observatory.One of the main scientific goals of DAMPE is to observe Ge V-Te V high energy γ-rays with accurate energy,angular and time resolution,to indirectly search for dark matter particles and for the study of high energy astrophysics. Due to the comparatively higher fluxes of charged cosmic rays with respect to γ-rays,it is challenging to identify γ-rays with sufficiently high efficiency,minimizing the amount of charged cosmic ray contamination. In this work we present a method to identify γ-rays in DAMPE data based on Monte Carlo simulations,using the powerful electromagnetic/hadronic shower discrimination provided by the calorimeter and the veto detection of charged particles provided by the plastic scintillation detector. Monte Carlo simulations show that after this selection the number of electrons and protons that contaminate the selected γ-ray events at~10 Ge V amounts to less than 1% of the selected sample.Finally,we use flight data to verify the effectiveness of the method by highlighting known γ-ray sources in the sky and by reconstructing preliminary light curves of the Geminga pulsar.
Document Type期刊论文
2.Istituto Nazionale di Fisica Nucleare Sezione di Bari
3.Istituto Nazionale di Fisica Nucleare Sezione di Perugia
First Author Affilication中国科学院紫金山天文台
Recommended Citation
GB/T 7714
Xu Zunlei,Duan Kaikai,Shen Zhaoqiang,et al. analgorithmtoresolveraysfromchargedcosmicrayswithdampe[J]. researchinastronomyandastrophysics,2018,018(003):27.
APA Xu Zunlei.,Duan Kaikai.,Shen Zhaoqiang.,Lei Shijun.,Dong Tiekuang.,...&Zimmer Stephan.(2018).analgorithmtoresolveraysfromchargedcosmicrayswithdampe.researchinastronomyandastrophysics,018(003),27.
MLA Xu Zunlei,et al."analgorithmtoresolveraysfromchargedcosmicrayswithdampe".researchinastronomyandastrophysics 018.003(2018):27.
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