Xiong 2009 Monte Carlo模拟 POLAR的观测

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Title:		Expected performance of a hard X-ray polarimeter (POLAR) by Monte Carlo simulation
Authors:		Xiong, Shaolin; Produit, Nicolas; Wu, Bobing
Affiliation:		AA(Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China), AB(ISDC, Université de Genève, Switzerland), AC(Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China)
Publication:		Nuclear Instruments and Methods in Physics Research Section A, Volume 606, Issue 3, p. 552-559.
Publication Date:		07/2009
Origin:		ELSEVIER
Abstract Copyright:		Elsevier B.V.
DOI:		10.1016/j.nima.2009.04.033
Bibliographic Code:		2009NIMPA.606..552X

Abstract

Polarization measurements of the prompt emission in gamma-ray bursts (GRBs) can provide diagnostic information for understanding the nature of the central engine. POLAR is a compact polarimeter dedicated to the polarization measurement of GRBs between 50 and 300 keV and is scheduled to be launched aboard the Chinese Space Laboratory around the year 2012. A preliminary Monte Carlo simulation has been accomplished to model the expected performance of POLAR while a prototype of POLAR is being constructed. The modulation factor, efficiency and effective area, background rates and minimum detectable polarization (MDP) were calculated for different detector configurations and trigger strategies. With the optimized detector configuration and trigger strategy and the total weight constraint of less than 30 kg, the primary science goal to determine whether most GRBs are strongly polarized can be achieved, and about 9 GRBs/yr can be detected with an MDP<10%> Bibtex entry for this abstract Preferred format for this abstract (see Preferences)