COMBINING XRISM AND CHANDRA FOR ROBUST VELOCITY POWER SPECTRA MEASUREMENTS IN THE ICM
Velocity power spectra (PS) of the ICM are necessary for testing multi-scale physics in numerical simulations and measuring turbulent dissipation/plasma properties. XRISM allows direct studies of ICM kinematics, but the large PSF makes it challenging to extract PS. However, by combining high-resolution imaging and spectroscopic missions, one can calibrate indirect methods of measuring PS. We aim to test the relation between turbulent Mach numbers measured with XRISM and ICM density fluctuations probed with Chandra by observing two clusters, A2034/A1914, with 120/100 ks exposures. These clusters have dissimilar fluctuations measured over a wide scale range, which is ideal for our goal. This calibration will provide a robust method to measure velocity PS and probe ICM transport properties.
TELESCOP= 'XRISM ' / Mission name INSTRUME= 'XTEND ' / Instrument name OBS_ID = '201093010' / Observation identification string OBJECT = 'A1914 ' / Object name OBSERVER= 'IRINA ZHURAVLEVA' / PI name OBS_MODE= 'POINTING' / POINTING or SLEW or ALL RA_OBJ = 216.5016 / [deg] Object Right ascension DEC_OBJ = 37.8257 / [deg] Object Declination RA_PNT = 216.497533941511 / Pointing RA DEC_PNT = 37.8250372521027 / Pointing DEC RA_NOM = 216.500326924886 / [deg] Nominal aspect point R.A. DEC_NOM = 37.8263553538578 / [deg] Nominal aspect point Dec. PA_NOM = 109.338040916117 / [deg] Nominal aspect point roll. TELAPSE = 214843.963135988 / Elapsed time DATE-OBS= '2025-01-17T16:51:04.036864' / Start date DATE-END= '2025-01-20T04:31:48' / Stop date ONTIME = 116493.49295 / On-source time EXPOSURE= 116493.49295 / 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 = '2025-01-24T05:08:08' / Date and time this file was created or updated SIB2_VER= 'V03.01 ' / SIB2 version JAXA