Cyg_X-3
We propose a 40 ks (minimal)/80 ks (ideal) observation of the unique and enigmatic high mass X-ray binary (HMXB) Cyg X-3. The iron line region in the Cyg X-3 spectrum contains hints of the dynamical effects of the black hole in this system. Improved measurements of the iron line radial velocity curve can be used to refine mass estimates for the black hole. In the soft state
obsid = 300065010 / Unique Observation/Sequence Number object = Cyg_X-3 / Object name pi_name = Collaboration XRISM / Proposal Principal Investigator Name ra = 308.107075511504 / Right Ascension (Pointing Position) (deg) dec = 40.9586412304539 / Declination (Pointing Position) (deg) roll_angle = 112.258824024504 / Roll Angle (deg) start_time = 2024-03-24T06:04:04 / Start Time of the Observation stop_time = 2024-03-25T16:34:04 / Stop Time of the Observation exposure = 62223.73088305 / Effective Total Observation Exposure (s) public_date= 2099-12-31 / Public Date