From the 1 of 8 linked papers with an AI index.
8 papers
Cross-spectral Analysis of the Type-C Quasi-periodic Oscillation Shoulder Component in GX 339-4
Haifan Zhu, Mariano Méndez, Pengcheng Yang +8
We revisit Rossi X-ray Timing Explorer (RXTE) observations of GX~3394 during the rising phase of its 2006/2007 outburst and apply a joint power-density-spectrum (PDS)--cross-spe…
Timing and Spectral Analysis of the 2024 Outburst of 2S 1553542 with NuSTAR and NICER
Haifan Zhu, Wei Wang, Wen Yang +4
The paper presents timing and spectral observations of the 2024 outburst of the Be/X‑ray binary pulsar 2S 1553‑542 using NuSTAR and NICER, measuring a 9.285 s pulse period, detecti…
Timing and spectral analysis of the 2025 outburst of 4U 163047 with \textit{NICER}
Haifan Zhu, Mariano Méndez, Xiao Chen +1
We analyzed \textit{NICER} observations of the 2025 outburst of the black hole X-ray binary 4U~163047 to investigate the spectral--timing properties of its transient low-frequen…
Unveiling hidden millihertz quasi-periodic oscillations in 1A 0535+262
Zihan Yang, Ruican Ma, Mariano Méndez +9
Be/X-ray binary pulsars show transient outbursts and complex timing behaviour, including millihertz quasi-periodic oscillations (QPOs), whose physical origin and energy dependence…
Marginally stable nuclear burning triggered at different depths of the neutron star surface in Low-mass X-ray binary 4U 1608-52
Lyu Ming, Zhang Guobao, Mendez Mariano +1
We investigated the timing and spectral properties of the millihertz quasi-periodic oscillations (mHz QPOs) in the neutron-star low-mass X-ray binary 4U 1608-52 using NICER observa…
A NICER view of the corona through time-dependent Comptonization of the quasi-periodic oscillations in nine black-hole X-ray binaries
Yuexin Zhang, Mariano Méndez, James F. Steiner +12
We present a systematic study of the evolution of the corona geometry in nine black hole X-ray binaries (BHXRBs) using archival data from NICER. We identify 171 observations exhibi…