XRISM XTEND observation 201044010

Title

ORIGIN OF THE FE K REPROCESSOR IN SEYFERT 1 GALAXY, IC 4329A

Abstract

Various structures within AGNs emit Fe K lines. IC 4329A, a prominent Seyfert 1 galaxy in X-rays with minimal absorption in its spectrum, is ideal for studying Fe K emission origins. Line width analysis suggests a radius of about 60 light-days, possibly representing an outer broad line region. We propose using a 130 ks observation with XRISM to constrain the ionization degree of this Fe K reprocessor, enabling the calculation of its number density and a deeper understanding of its properties. Anticipated log ionization parameter falls between 1 and 2, with Fe Kalpha and Kbeta lines exhibiting energy shifts of several eV within this range. XRISM is uniquely equipped to detect this energy shift within a reasonable exposure time.

FITS header

TELESCOP= 'XRISM   '           / Mission name
INSTRUME= 'XTEND   '           / Instrument name
OBS_ID  = '201044010'          / Observation identification string
OBJECT  = 'IC4329A '           / Object name
OBSERVER= 'MISAKI MIZUMOTO'    / PI name
OBS_MODE= 'POINTING'           / POINTING or SLEW or ALL
RA_OBJ  =             207.3303 / [deg] Object Right ascension
DEC_OBJ =             -30.3095 / [deg] Object Declination
RA_PNT  =     207.333690614216 / Pointing RA
DEC_PNT =    -30.3080217360162 / Pointing DEC
RA_NOM  =      207.33117155779 / [deg] Nominal aspect point R.A.
DEC_NOM =    -30.3093909813728 / [deg] Nominal aspect point Dec.
PA_NOM  =     288.000104629399 / [deg] Nominal aspect point roll.
TELAPSE =     234921.963135988 / Elapsed time
DATE-OBS= '2025-08-07T23:22:05.036864' / Start date
DATE-END= '2025-08-10T16:37:27' / Stop date
ONTIME  =         106650.28434 / On-source time
EXPOSURE=         106650.28434 / Exposure time
PROCVER = '03.03.015.012'      / Processing script version
MKFFF   = 'ISAS/JAXA'          / Origin of First FITS file
ORIGIN  = 'GSFC/NASA'          / Origin of Processed FITS file
SOFTVER = 'Hea_26Sep2025_V6.36_XRISM_12Sep2025_V003' / Version of HEADAS used
CALDBVER= 'gen20241115_xtd20250915_rsl20250915' / Version of CALDB used
DATE    = '2025-10-08T16:13:24' / Date and time this file was created or updated
SIB2_VER= 'V04.00  '           / SIB2 version JAXA

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