MAHITOSASADA

Last Updated :2019/10/01

Affiliations, Positions
Hiroshima Astrophysical Science Center, ., Assistant Professor (Special Appointment)
E-mail
sasadamhiroshima-u.ac.jp
Self-introduction
I mainly study an optical and near-infrared astronomy. The main target is a relativistic jet which is ejected from the center of active galactic nuclei (AGNs). AGNs are located on the center of galaxies. I observe the jets and other objects by using Kanata telescope at Higashi-Hiroshima Observatory and radio telescopes. Recently, I'm belonging to J-GEM (Japanese Collaboration for Gravitational-Wave Electro-Magnetic Follow-up) to identify and observe the gravitational-wave counterpart. Furthermore, I configure and maintain a HinOTORI 50-cm optical telescope at Ali in Tibet, China.

Basic Information

Research Fields

  • Mathematical and physical sciences;Astronomy;Astronomy

Research Keywords

  • Optical and near-infrared astronomy, high-energy astronomy, jet, polarization, multi-wavelength

Research Activities

Academic Papers

  1. Bayesian Approach to Find a Long-Term Trend in Erratic Polarization Variations Observed in Blazars, 20091116
  2. Multiband Photopolarimetric Monitoring of the Outburst of the Blazar 3C~454.3 in 2007, 20100310
  3. Prominent Polarized Flares of the Blazars AO 0235+164 and PKS 1510-089, 20110209
  4. Photopolarimetric Monitoring of Blazars in the Optical and Near-Infrared Bands with the Kanata Telescope. I. Correlations between Flux, Color, and Polarization, 20110513
  5. Multi-Wavelength Photometric and Polarimetric Observations of the Outburst of 3C 454.3 in Dec. 2009, 20111220
  6. Extremely high polarization in 2010 outburst of blazar 3C 454.3, 20140225
  7. Understanding the General Feature of Microvariability in ${\it Kepler}$ Blazar W2R 1926$+$42, 20161119
  8. Optical Emission and Particle Acceleration in a Quasi-Stationary Component in the Jet of OJ~287, 20180730
  9. Understanding the general feature of microvariability in Kepler blazar W2R 1926+42, Publications of the Astronomical Society of Japan, 69(1), 20170101
  10. Optical Emission and Particle Acceleration in a Quasi-stationary Component in the Jet of OJ 287, Astrophysical Journal, 864(1), 20180901
  11. First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring, Astrophysical Journal Letters, 875(1), 20190410
  12. First M87 Event Horizon Telescope Results. I. the Shadow of the Supermassive Black Hole, Astrophysical Journal Letters, 875(1), 20190410
  13. First M87 Event Horizon Telescope Results. VI. the Shadow and Mass of the Central Black Hole, Astrophysical Journal Letters, 875(1), 20190410