XRISM RESOLVE observation 201050010

Title

GAS DYNAMICS IN THE MOST STRIKING CLUSTER COLD FRONT

Abstract

Cluster mergers are the most energetic events in the Universe since the Big Bang. A large fraction of the merger energy is dissipated in the ICM, a process that depends on a number of unknown microphysical properties of the ICM. Resolve will provide the first opportunity to detect and map the bulk and turbulent velocities in the ICM of nearby merging systems. We propose to observe a textbook example of a cold front in Abell 3667, a striking phenomenon caused by a merger. Resolve observations of this cold front would yield the bulk and turbulent velocities as a function of the distance from the interface, determining the origin of the front and providing a basis for the derivation of microphysical constraints from cold fronts, and answer a host of other interesting questions.

FITS header

TELESCOP= 'XRISM   '           / Mission name
INSTRUME= 'RESOLVE '           / Instrument name
FILTER  = 'FE55    '           / Filter name used
OBS_ID  = '201050010'          / Observation identification string
OBJECT  = 'ABELL3667_CF_IN'    / Object name
OBSERVER= 'YUTO ICHINOHE'      / PI name
OBS_MODE= 'POINTING'           / POINTING or SLEW or ALL
RA_OBJ  =             303.2648 / [deg] Object Right ascension
DEC_OBJ =             -56.8863 / [deg] Object Declination
RA_PNT  =     303.271941287967 / Pointing RA
DEC_PNT =    -56.8843313400708 / Pointing DEC
RA_NOM  =     303.265250290011 / [deg] Nominal aspect point R.A.
DEC_NOM =     -56.886160163939 / [deg] Nominal aspect point Dec.
PA_NOM  =     250.001110527839 / [deg] Nominal aspect point roll.
TELAPSE =     349560.924840003 / Elapsed time
DATE-OBS= '2024-10-31T17:53:51.234375' / Start date
DATE-END= '2024-11-04T18:59:52.159215' / Stop date
ONTIME  =         21827.873846 / On-source time
EXPOSURE=         21827.873846 / Exposure time
PROCVER = '03.00.013.009'      / 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= 'gen20240315_xtd20240815_rsl20240815' / Version of CALDB used
DATE    = '2024-11-08T09:57:12' / Date and time this file was created or updated
SIB2_VER= 'V03.01  '           / SIB2 version JAXA

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