We provided a comprehensive study of the properties of the black hole in the low-mass X-ray binary system 4U 1543-47, specifically focusing on the 2021 outburst (MJD 59380-59470). Using observations from the Insight-HXMT mission, we employed X-ray reflection fitting method and analyzed spectral data to estimate key black hole parameters. Through our investigation redbased on 6 out of the 52 available observations, we estimated the spin parameter of the black hole to be 0.902-0.053+0.054 and the inclination angle of the accretion disk to be 28.91-1.24+1.82 degrees (90% confidence limits, statistical only), then we discussed the influence of high luminosity. Based on the relxill series models are not suitable for thick disk scenario, and in comparison with findings from other studies, we propose that our estimation of the spin value may be exaggerated.
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Yang et al. (2024) studied this question.
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