3 papers
astro-ph.HE2025
First Detection of X-ray Polarization and Its Short-term Increase Pre- and Post-Eclipse in HMXB 4U 1700-377
Kaito Ninoyu, Keisuke Uchiyama, Shinya Yamada +9
We report the first statistically significant detection of X-ray polarization from the high-mass X-ray binary (HMXB) 4U 1700-377, observed using the Imaging X-ray Polarimetry Explo…
astro-ph.HE2025
Arcsecond-Scale X-ray Imaging and Spectroscopy of SS 433 with Chandra HETG
Yusuke Sakai, Shinya Yamada, Haruka Sakemi +5
We present a spatial and spectral analysis of arcsecond-scale X-ray emission in SS 433 using zeroth-order data from Chandra High-Energy Transmission Grating (HETG) observations. Th…
astro-ph.HE2024
Polarized X-rays Correlated with Short--Timescale Variability of Cygnus X-1
Kaito Ninoyu, Yuusuke Uchida, Shinya Yamada +4
We systematically investigate the variability of polarized X-rays on a timescale of a few seconds in the low/hard state of the black hole binary Cygnus X-1. The correlation between…