XRISM XTEND observation 201070010

Title

ATMOSPHERIC GAS MOTIONS IN THE HYDRA A GALAXY CLUSTER

Abstract

Hydra A is the most powerful FR I radio source in the nearby Universe. Emanating from the central galaxy in a bright X-ray cluster, its jets have inflated a system of X-ray cavities and a surrounding Mach 1.3 shock front extending several hundred kiloparsecs into the cluster atmosphere. Its proximity (z=0.054) and large angular size requires two pointings to measure the energetics of the active inner jets and a second pointing toward the enormously powerful northern cavity and surrounding shock front. The pointings will reveal the expansion speed and cluster weather due to atmospheric bulk motion on the structure of the X-ray cavities. This measurement addresses the fundamental problem of how jet energy heats cluster atmospheres and prevents catastrophic cooling.

FITS header

TELESCOP= 'XRISM   '           / Mission name
INSTRUME= 'XTEND   '           / Instrument name
OBS_ID  = '201070010'          / Observation identification string
OBJECT  = 'HYDRA_A_CENTRAL'    / Object name
OBSERVER= 'BRIAN MCNAMARA'     / PI name
OBS_MODE= 'POINTING'           / POINTING or SLEW or ALL
RA_OBJ  =             139.5235 / [deg] Object Right ascension
DEC_OBJ =             -12.0956 / [deg] Object Declination
RA_PNT  =     139.520274102384 / Pointing RA
DEC_PNT =    -12.0962288413832 / Pointing DEC
RA_NOM  =     139.522642224469 / [deg] Nominal aspect point R.A.
DEC_NOM =    -12.0951141192991 / [deg] Nominal aspect point Dec.
PA_NOM  =     114.487665881741 / [deg] Nominal aspect point roll.
TELAPSE =     209216.963135988 / Elapsed time
DATE-OBS= '2024-11-27T05:42:51.036864' / Start date
DATE-END= '2024-11-29T15:49:48' / Stop date
ONTIME  =         116995.88494 / On-source time
EXPOSURE=         116995.88494 / 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    = '2024-12-04T07:11:56' / Date and time this file was created or updated
SIB2_VER= 'V03.01  '           / SIB2 version JAXA

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