Description
Chair: N. Kawai (RIKEN)
MAXI has been working for 15 years and contributing to a part of the time-domain astronomy by the quick alerts of transients. The main instrument GSC of MAXI has been stable after some damage occurred in the first year. The other instrument SSC has damaged due to the radiation damage. The main system of the MAXI suffered abrupt shut down twice in 2022 June. Since then SSC was stopped to reduce...
MAXI discovered 35 newly discovered X-ray novae or short transients, including 14 or more black hole candidates and the first Be/whit-dwarf nova MAXI J0158-744. The nature of some of them are still unknown. MAXI also detected a number of X-ray novae and X-ray or gamma bursts. I briefly summarize those transients sources MAXI discoverd/detected in 15 years.
The Neil Gehrels Swift Observatory, which turns 20 years old in November 2024, is an epochal mission for TDAMM science thanks to it's rapid response capabilities, allowing for fast turn around observation of transients both discovered by Swift itself, and other observatories. It's combination of sensitive X-ray and UV/Optical telescopes allows for broadband follow-up of events discovered by...
MAXI provides all-sky monitoring in the X-ray band, identifying multiple new sources each year, but a fraction of these transient sources falls too close to the Sun for most X-ray observatories to safely perform rapid follow-up observations. NuSTAR, however, is able to observe sources with much smaller angular separation from the Sun than other observatories, making it a uniquely capable tool...
We, Science Satellite Operation and Data Archive Unit (C-SODA) in JAXA, have developed FTOOLS-based software (mxsim_psf and mxsim_bgd), which can make simulations of point spread function (PSF) and non X-ray background (NXB) of MAXI/GSC. These tools will be released from HEASARC, soon. By using these tools, we start to develop a tool to make MAXI/GSC light curves obtained by image-fits using...
A strong solar flare of X6.3 class occurred on February 22, 2024. X-rays from the solar flare are reflected by the moon, MAXI captured the fluorescent X-rays. MAXI detected emission lines of three elements, Si, Ca, and Fe. Those were consistent with the main elements of the moon surface. We considered a model of the reflected X-rays by the moon and compared the intensities of the calculated...
We analyzed 186 cluster of galaxies with MAXI and obtained luminosity, temperature, and abundance. Significant abundance was obtained from 32 clusters, whose average was 0.29 +- 0.06. It is consistent with the previous works. The temperature was obtained from 179 clusters, from which the relation between the luminosity and temperature was obtained as L is proportional to T^4.01. This value was...
