2S0921-630
In most XRISM programs, spectral lines observed with Resolve are formed in the NLTE conditions. For proper interpretations of the observed spectra, spectral synthesis based on the numerical RT calculation is a requisite. Recently, intensive efforts have been made to develop widely-used RT codes to be applicable to the high-resolution X-ray spectroscopy. Resolve observations of X-ray binaries are producing gorgeous datasets with many new Fe features critical to benchmarking the RT code developments and deriving key plasma parameters. The next obvious step is to extend the diagnostics to lower-Z elements, for which Resolve has advantages. We propose to observe 2S 0921 630, the brightest ADC source with a log xi=2-3 plasma.
obsid = 202058010 / Unique Observation/Sequence Number
object = 2S0921-630 / Object name
pi_name = TSUJIMOTO MASAHIRO / Proposal Principal Investigator Name
ra = 140.645355955617 / Right Ascension (Pointing Position) (deg)
dec = -63.2945039807927 / Declination (Pointing Position) (deg)
roll_angle = 122.646727700099 / Roll Angle (deg)
start_time = 2025-12-07T09:51:04 / Start Time of the Observation
stop_time = 2025-12-11T06:29:04 / Stop Time of the Observation
exposure = 167665.77455 / Effective Total Observation Exposure (s)
public_date= 2026-12-18 / Public Date