XRISM RESOLVE observation 201074010

Title

MAPPING THE 3D GEOMETRY OF THE DISK WIND OF HERCULES X-1

Abstract

Her X-1 is an X-ray binary with a warped, precessing disk, uniquely allowing us to sample the vertical structure of its disk wind, and measure the wind number density from its time-dependent ionization response to the X-ray pulsations of the neutron star. We request 180 ks of XRISM exposure to perform a deep analysis of the wind of Her X-1. Pulse-resolved analysis of these exposures will result in 3 to 5 constraints on the wind number density over a range of heights above disk, allowing us to fit for density evolution with height. The measured density evolution will strongly constrain the wind launching mechanism. These observations will give us the best 3D understanding of an accretion disk wind in an XRB, and result in the most precise total mass outflow rate and energetics measurements.

FITS header

TELESCOP= 'XRISM   '           / Mission name
INSTRUME= 'RESOLVE '           / Instrument name
FILTER  = 'OPEN    '           / Filter name used
OBS_ID  = '201074010'          / Observation identification string
OBJECT  = 'HERCULES_X-1'       / Object name
OBSERVER= 'PETER KOSEC'        / PI name
OBS_MODE= 'POINTING'           / POINTING or SLEW or ALL
RA_OBJ  =             254.4575 / [deg] Object Right ascension
DEC_OBJ =              35.3424 / [deg] Object Declination
RA_PNT  =     254.462644745379 / Pointing RA
DEC_PNT =     35.3431031022665 / Pointing DEC
RA_NOM  =     254.457671288475 / [deg] Nominal aspect point R.A.
DEC_NOM =     35.3426047134395 / [deg] Nominal aspect point Dec.
PA_NOM  =     269.572228217572 / [deg] Nominal aspect point roll.
TELAPSE =     376017.919082999 / Elapsed time
DATE-OBS= '2024-09-10T02:19:06.050659' / Start date
DATE-END= '2024-09-14T10:46:03.969742' / Stop date
ONTIME  =         212603.66568 / On-source time
EXPOSURE=         212603.66568 / 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    = '2024-09-19T04:09:55' / Date and time this file was created or updated
SIB2_VER= 'V03.01  '           / SIB2 version JAXA

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