CYGNUS_X-1
Cygnus X-1 (Cyg X-1) was observed for 100 ks during the initial XRISM campaign, resulting in the first observational evidence of a blueshifted absorber moving at $ sim$100 km/s. These findings, summarized in the initial publication, also demonstrated the potential to constrain the system's parameters through detailed comparisons with stellar wind models. Building on these results, we propose an additional 50 ks observation. This follow-up aims to better characterize the broadband spectral properties of Cyg X-1, with a particular focus on temporal variability. In particular, we seek to improve the precision of measurements of neutral iron and ionized absorbers by capturing short-timescale variations, which are key to understanding the structure and dynamics of the Cyg X-1 syste
obsid = 202064010 / Unique Observation/Sequence Number
object = CYGNUS_X-1 / Object name
pi_name = YAMADA SHINYA / Proposal Principal Investigator Name
ra = 299.589835406229 / Right Ascension (Pointing Position) (deg)
dec = 35.2009632079796 / Declination (Pointing Position) (deg)
roll_angle = 89.7817048225989 / Roll Angle (deg)
start_time = 2026-03-31T01:38:04 / Start Time of the Observation
stop_time = 2026-04-01T07:02:04 / Stop Time of the Observation
exposure = 56656.741797025 / Effective Total Observation Exposure (s)
public_date= 2027-04-09 / Public Date