XRISM RESOLVE observation 300021010

Title

TIME EVOLUTION OF YOUNG NEI PLASMA IN SN 1987A

Abstract

The nascent core-collapse supernova remnant SN1987A presents a unique opportunity to observe the rapid time evolution of a non-equilibrium ionization (NEI) collisional plasma at early evolutionary timescales. During the XRISM mission life, the NEI plasma emission from the ejecta is expected to become dominant as compared to the emission from the surrounding equatorial ring and HII regions. The minimal goal is to separate and characterize the ejecta emission by the high-resolution spectra. The ideal goal is to measure the time evolution with two observations to directly study the structure and chemical composition of the ejecta to limit progenitor types. Another bonus is to observationally verify the Rankine-Hugoniot relation from ion temperatures by species.

FITS header

TELESCOP= 'XRISM   '           / Mission name
INSTRUME= 'RESOLVE '           / Instrument name
FILTER  = 'FE55    '           / Filter name used
OBS_ID  = '300021010'          / Observation identification string
OBJECT  = 'SN1987A '           / Object name
OBSERVER= 'XRISM Collaboration' / PI name
OBS_MODE= 'POINTING'           / POINTING or SLEW or ALL
RA_OBJ  =             83.86675 / [deg] Object Right ascension
DEC_OBJ =            -69.26975 / [deg] Object Declination
RA_PNT  =     83.8619663322448 / Pointing RA
DEC_PNT =    -69.2723583589634 / Pointing DEC
RA_NOM  =     83.8667436601168 / [deg] Nominal aspect point R.A.
DEC_NOM =     -69.268637168912 / [deg] Nominal aspect point Dec.
PA_NOM  =     31.0129306823298 / [deg] Nominal aspect point roll.
TELAPSE =      413671.21825999 / Elapsed time
DATE-OBS= '2024-06-17T19:05:27' / Start date
DATE-END= '2024-06-22T13:59:58.218260' / Stop date
ONTIME  =         26170.046093 / On-source time
EXPOSURE=         26170.046093 / 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    = '2024-09-24T08:52:11' / Date and time this file was created or updated
SIB2_VER=                      / SIB2 version JAXA

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