SIMBAD references

MAXI J1348-630 is a low-mass X-ray black hole binary located in the Galaxy and undergone the X-ray outburst in 2019. We analysed the observation data in very soft state during the outburst between MJD 58588 and MJD 58596 based on the Insight-HXMT observations from 2 to 20 keV via the continuum fitting method to measure the spin of the stellar-mass black hole in MAXI J1348-630. The inner disc temperature and the apparent inner disc radius were found to be $0.47\pm 0.01 \rm \,\rm \,keV$ and 5.33 ± 0.10 R_g from the observation data modeled by the multicolour disc blackbody model. Assuming the distance of the source $D\sim 3.4 \rm \,kpc$ , the mass of the black hole M ∼ 11 M_⊙, and the inclination of the system i ∼ 29.2°, the spin is determined to be a_⋆ = 0.41 ± 0.03 for fixing hardening factor at 1.6 and $n_{H}=8.6\times 10^{21} \rm cm^{-2}$ . Besides, considering the uncertainty of the parameters D, M, i of this system, with the Monte Carlo analysis, we still confirm the moderate spin of the black hole as $a_{\star }=0.42^{+0.13}_{-0.50}$ . Some spectral parameters (e.g. column density and hardening factor) which could affect the measurements of the BH spin are also briefly discussed.