XRISM RESOLVE observation 201045010

Title

FIRST MEASUREMENT OF DYNAMICS AND PLASMA DIAGNOSTICS OF THE GALACTIC CENTER DIFFUSE X-RAYS

Abstract

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.

FITS header

TELESCOP= 'XRISM   '           / Mission name
INSTRUME= 'RESOLVE '           / Instrument name
FILTER  = 'FE55    '           / Filter name used
OBS_ID  = '201045010'          / Observation identification string
OBJECT  = 'SAGITTARIUS_B'      / Object name
OBSERVER= 'MASAYOSHI NOBUKAWA' / PI name
OBS_MODE= 'POINTING'           / POINTING or SLEW or ALL
RA_OBJ  =             266.8256 / [deg] Object Right ascension
DEC_OBJ =             -28.3794 / [deg] Object Declination
RA_PNT  =     266.821194569752 / Pointing RA
DEC_PNT =    -28.3790863447439 / Pointing DEC
RA_NOM  =      266.82579648004 / [deg] Nominal aspect point R.A.
DEC_NOM =    -28.3785266592658 / [deg] Nominal aspect point Dec.
PA_NOM  =     88.7060342541449 / [deg] Nominal aspect point roll.
TELAPSE =     114845.719852984 / Elapsed time
DATE-OBS= '2025-02-16T20:50:47.961405' / Start date
DATE-END= '2025-02-18T04:44:53.681258' / Stop date
ONTIME  =         2674.7776251 / On-source time
EXPOSURE=         2674.7776251 / Exposure time
PROCVER = '03.00.013.010'      / Processing script version
MKFFF   = 'ISAS/JAXA'          / Origin of First FITS file
ORIGIN  = 'GSFC/NASA'          / Origin of Processed FITS file
SOFTVER = 'Hea_21Aug2024_V6.34_XRISM_21Aug2024_V001' / Version of HEADAS used
CALDBVER= 'gen20241115_xtd20241115_rsl20241115' / Version of CALDB used
DATE    = '2025-02-22T08:50:20' / Date and time this file was created or updated
SIB2_VER= 'V03.01  '           / SIB2 version JAXA

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