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arXiv · 2309.05232

The spin measurement of MAXI J1348-630 using the Insight-HXMT data

Yujia Song·Nan Jia·Jun Yang·Ye Feng·Lijun Gou·Tianhua Lu
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Abstract

We report the results of fitting Insight-HXMT data to the black hole X-ray binary MAXI J1348-430, which was discovered on January 26th, 2019, with the Gas Slit Camera (GSC) on-board MAXI. Several observations at the beginning of the first burst were selected, with a total of 10 spectra. From the residuals of fits using disk plus power law models, X-ray reflection signatures were clearly visible in some of these observations. We use the state-of the-art relxill series reflection model to fit six spectra with distinct reflection signatures and a joint fit to these spectra. In particular, we focus on the results for the black hole spin values. Assuming Rin = RISCO, the spin parameter is constrained to be 0.82+0.04-0.03 with 90% confidence level (statistical only).

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Yujia Song, Nan Jia, Jun Yang, Ye Feng, Lijun Gou, Tianhua Lu. 2023-09-11. The spin measurement of MAXI J1348-630 using the Insight-HXMT data. https://doi.org/10.1093/mnras/stad3166

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