Kyoto University · Physics and Astronomy
Professor T. Saito's research spans high-energy astrophysics and plant molecular biology, with a focus on very high-energy gamma-ray astronomy using Cherenkov telescopes like MAGIC, and the functional characterization of magnesium transporters in higher plants, particularly in rice. His work in astrophysics investigates transient VHE gamma-ray emissions from active galactic nuclei and pulsars, challenging existing emission models through precise spectral measurements. In plant biology, he explores the evolutionary and functional diversity of MRS2/MGT family genes, aiming to understand magnesium homeostasis across monocot and dicot species. His interdisciplinary approach bridges observational astrophysics and molecular plant physiology.
Figures are computed from collected data and may differ slightly.
Very High Energy (VHE) gamma-ray emission from the flat spectrum radio quasar PKS 1222+21 (4C 21.35, z=0.432) was detected with the MAGIC Cherenkov telescopes during a short observation (~0.5 h) performed on 2010 June 17. The MAGIC detection coincides with high energy MeV/GeV gamma-ray activity measured by the Large Area Telescope (LAT) on board the Fermi satellite. The VHE spectrum measured by MAGIC extends from about 70 GeV up to at least 400 GeV and can be well described by a power law dN/dE
We report on the observation of -rays above 25 GeV from the Crab pulsar (PSR B0532+21) using the MAGIC I telescope. Two data sets from observations during the winter period 2007/2008 and 2008/2009 are used. In order to discuss the spectral shape from 100 MeV to 100 GeV, one year of public Fermi Large Area Telescope (Fermi-LAT) data are also analyzed to complement the MAGIC data. The extrapolation of the exponential cutoff spectrum determined with the Fermi-LAT data is inconsistent with MAGIC mea
Maintenance of an appropriate magnesium ion (Mg(2+)) concentration is essential for plant growth. In Arabidopsis thaliana, the CorA-MRS2-ALR-type proteins, named MRS2/MGT family proteins, are reportedly localized in various membranes and they function in Mg transport. However, knowledge of this family in other plant species is extremely limited. Furthermore, differential diversification among dicot and monocot plants suggested by phylogenetic analysis indicates that the role of the Arabidopsis M
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