Spectral Analysis of the X-Ray Flares in the 2023 Outburst of the New Black Binary Transient Swift J1727.8–1613 Observed with Insight-HXMT
Jia-Ying Cao et al 2025 ApJ 983 23
X-ray spectra suggest that a new black hole transient was caught in the process of transitioning from the hard intermediate state to the very high state, and continued in the very high state during later flare periods.