THE X-RAY VIEW OF INTERSTELLAR DUST FROM SILICON TO IRON
We propose to observe the bright X-ray binary GX340+00 for 150 ks in order to explore the chemical and physical properties of the intervening interstellar dust. This source is the ideal candidate to study dense, never explored before, regions of the Galaxy. We will model the Si, S, Ca and Fe K-edges due to dust absorption. This will allow us to assess the silicate content (through Si and Fe) and its Ca inclusion in the core, as well as the sulphate content (through S and Fe). Additional science includes the study of the intrinsic highly ionized absorber/emitter.
TELESCOP= 'XRISM ' / Mission name INSTRUME= 'RESOLVE ' / Instrument name FILTER = 'OPEN ' / Filter name used OBS_ID = '300002020' / Observation identification string OBJECT = 'GX340+00' / Object name OBSERVER= 'XRISM Collaboration' / PI name OBS_MODE= 'POINTING' / POINTING or SLEW or ALL RA_OBJ = 251.4487 / [deg] Object Right ascension DEC_OBJ = -45.6111 / [deg] Object Declination RA_PNT = 251.455589812824 / Pointing RA DEC_PNT = -45.6101380142743 / Pointing DEC RA_NOM = 251.44988706895 / [deg] Nominal aspect point R.A. DEC_NOM = -45.6110282506432 / [deg] Nominal aspect point Dec. PA_NOM = 263.999481474195 / [deg] Nominal aspect point roll. TELAPSE = 290933 / Elapsed time DATE-OBS= '2024-08-31T17:03:33' / Start date DATE-END= '2024-09-04T01:52:26' / Stop date ONTIME = 152960.95039 / On-source time EXPOSURE= 152960.95039 / 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 = '2024-09-11T06:32:15' / Date and time this file was created or updated SIB2_VER= 'V03.01 ' / SIB2 version JAXA