RESOLVING THE FE K FLUORESCENCE COMPLEX AND COMPTON SHOULDER IN GX 301-2 WITH XRISM
We propose a 50 ks observation of the Compton-thick hypergiant X-ray Binary GX 301-2 during its regular pre-periastron flares. We will study the exact shape of the strong Fe K fluorescence line complex, the Fe K absorption edge, and the Compton shoulder profile. All these provide information on the ionization structure, temperature, column density and geometry of the absorbing material. We will also study the temporal variability of the Fe K lines and edge in 500s steps to probe the inhomogeneity of the stellar wind of the donor. This observation will therefore contribute to the construction of a self-consistent picture of the geometry and distribution of the reprocessing material in GX 301-2 and the interaction of the strong X-ray radiation with the dense wind of the stellar companion.
TELESCOP= 'XRISM ' / Mission name INSTRUME= 'XTEND ' / Instrument name OBS_ID = '201072010' / Observation identification string OBJECT = 'GX301-2 ' / Object name OBSERVER= 'RALF BALLHAUSEN' / PI name OBS_MODE= 'POINTING' / POINTING or SLEW or ALL RA_OBJ = 186.6565 / [deg] Object Right ascension DEC_OBJ = -62.7704 / [deg] Object Declination RA_PNT = 186.649861722514 / Pointing RA DEC_PNT = -62.7701922177468 / Pointing DEC RA_NOM = 186.655427195032 / [deg] Nominal aspect point R.A. DEC_NOM = -62.769846646187 / [deg] Nominal aspect point Dec. PA_NOM = 132.464034136722 / [deg] Nominal aspect point roll. TELAPSE = 111744 / Elapsed time DATE-OBS= '2025-02-01T20:10:04' / Start date DATE-END= '2025-02-03T03:12:28' / Stop date ONTIME = 54553.67746 / On-source time EXPOSURE= 54553.67746 / 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 = '2025-02-07T02:36:02' / Date and time this file was created or updated SIB2_VER= 'V03.01 ' / SIB2 version JAXA