p0300: All four CCDs in full window mode
Light curve
Transient sources detected in this observation and reported through The Astronomer's Telegram.
XRISM/Xtend Transient Search (XTS) detected an X-ray flare from XRISM J1046-5939
| Date | 2025-08-30 |
|---|---|
| Author(s) | Mizumoto et al. |
| Coordinates | RA = 161.535 deg, Dec = -59.651 deg |
| Reported flux | 1e-12 erg cm−2 s−1 |
UNVEILING EXPLOSION MECHANISM OF TYPE IA SNR G344.7-0.1 BY MEASURING RARE ELEMENTS AND VELOCITY STRUCTURES WITH XRISM
Although Type Ia SNe have attracted a great deal of interest, the explosion mechanism is still controversial. So far, two possible scenarios have been put forward: explosion of a white dwarf close to the Chandrasekhar limit (near-Ch) or smaller than the limit (sub-Ch). According to the latest theories, abudances and velocity structures significantly differ between the near-/sub-Ch models. Here we propose a XRISM observation of G344.7-0.1, which is one of the brightest Type Ia SNR. While previous studies suggest detections of Cr and Mn, the measurement is still uncertain and better precision measurements are required. This observation will reveal abundances of rare elements and their velocity structures, both of which are critical to elucidate the explosion mechanism of Type Ia SNe.
TELESCOP= 'XRISM ' / Mission name INSTRUME= 'XTEND ' / Instrument name OBS_ID = '201062010' / Observation identification string OBJECT = 'G344.7-0.1' / Object name OBSERVER= 'MOE ANAZAWA' / PI name OBS_MODE= 'POINTING' / POINTING or SLEW or ALL RA_OBJ = 255.9583 / [deg] Object Right ascension DEC_OBJ = -41.7167 / [deg] Object Declination RA_PNT = 255.960409337952 / Pointing RA DEC_PNT = -41.7149193077817 / Pointing DEC RA_NOM = 255.958205470503 / [deg] Nominal aspect point R.A. DEC_NOM = -41.716893659028 / [deg] Nominal aspect point Dec. PA_NOM = 269.997167399083 / [deg] Nominal aspect point roll. TELAPSE = 237151 / Elapsed time DATE-OBS= '2025-08-27T19:07:20' / Start date DATE-END= '2025-08-30T12:59:51' / Stop date ONTIME = 108404.91671 / On-source time EXPOSURE= 108404.91671 / Exposure time PROCVER = '03.02.014.010' / Processing script version MKFFF = 'ISAS/JAXA' / Origin of First FITS file ORIGIN = 'GSFC/NASA' / Origin of Processed FITS file SOFTVER = 'Hea_12Mar2025_V6.35_XRISM_28Feb2025_V002' / Version of HEADAS used CALDBVER= 'gen20241115_xtd20241115_rsl20241115' / Version of CALDB used DATE = '2025-09-04T12:26:01' / Date and time this file was created or updated SIB2_VER= 'V04.00 ' / SIB2 version JAXA