SAGITTARIUS_B
The Galactic center diffuse X-rays (GCXE) has been one of interesting mysteries in X-ray astronomy for 50 years. It is still under discussion whether the origin of the GCXE is ensemble of faint point sources or truly diffuse plasma. This XRISM observation will aim to the Sagittarius B and C regions in the Galactic center to perform measurement of dynamical motion and plasma diagnostics and to derive the diffuse plasma from the GCXE for the first time. The physical information (motion, temperature, ionization degree, mass, abundances) constrain production mechanism of the diffuse plasma (stellar wind, supernova, Sgr A*, etc). Contribution to the evolution of the Galaxy will be also discussed.
obsid = 201045020 / Unique Observation/Sequence Number
object = SAGITTARIUS_B / Object name
pi_name = NOBUKAWA MASAYOSHI / Proposal Principal Investigator Name
ra = 266.825595893448 / Right Ascension (Pointing Position) (deg)
dec = -28.3783207500283 / Declination (Pointing Position) (deg)
roll_angle = 88.7060410846253 / Roll Angle (deg)
start_time = 2025-02-19T06:54:04 / Start Time of the Observation
stop_time = 2025-02-20T04:53:04 / Stop Time of the Observation
exposure = 41970.523503 / Effective Total Observation Exposure (s)
public_date= 2026-04-05 / Public Date