DmpIRFs and DmpST: DAMPE Instrument Response Functions and Science Tools for Gamma-Ray Data Analysis

• Published in: arXiv.org
• Main Authors: Kai-Kai Duan, Jiang, Wei, Yun-Feng, Liang, Zhao-Qiang, Shen, Zun-Lei Xu, Yi-Zhong, Fan, Gargano, Fabio, Garrappa, Simone, Dong-Ya Guo, Shi-Jun, Lei, Li, Xiang, Mazziotta, Mario Nicola, Munoz Salinas, Maria Fernanda, Su, Meng, Vagelli, Valerio, Yuan, Qiang, Yue, Chuan, Zimmer, Stephan
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 30.04.2019
• Subjects: Angular resolution; Astrophysics; Computer simulation; Dark matter; Data analysis; Gamma rays; Maximum likelihood method; Photons; Physics - High Energy Astrophysical Phenomena; Physics - Instrumentation and Methods for Astrophysics; Point spread functions; Response functions; Software; Space telescopes
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1904.13098

GeV gamma ray is an important observation target of DArk Matter Particle Explorer (DAMPE) for indirect dark matter searching and high energy astrophysics. We present in this work a set of accurate instrument response functions of DAMPE (DmpIRFs) including the effective area, point-spread function and energy dispersion that are crucial for the gamma-ray data analysis based on the high statistics simulation data. A dedicated software named DmpST is developed to facilitate the scientific analyses of DAMPE gamma-ray data. Considering the limited number of photons and the angular resolution of DAMPE, the maximum likelihood method is adopted in the DmpST to better disentangle different source components. The basic mathematics and the framework regarding this software are also introduced in this paper.