The 2024 outburst of 2S 1553−542 has a 9.285022 s spin period, a ~24 keV cyclotron line (B~3×10^12 G), and only candidate mHz variability in short NICER data.
Detection of Multiple X-Ray Quasi-periodic Oscillations in IGR J19294+1816 with Insight-HXMT.The Astrophysical Journal2025,988, 115
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Timing and Spectral Analysis of the 2024 Outburst of 2S 1553$-$542 with NuSTAR and NICER
The 2024 outburst of 2S 1553−542 has a 9.285022 s spin period, a ~24 keV cyclotron line (B~3×10^12 G), and only candidate mHz variability in short NICER data.