The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
권호 표지

Optical follow-up observation of three long GRBs with SomangNet facilities

  • Paek, Gregory S.H. (Astronomy Program, Department of Physics & Astronomy, Seoul National University) ;
  • Im, MyungShin (Astronomy Program, Department of Physics & Astronomy, Seoul National University) ;
  • Kim, Joonho (Astronomy Program, Department of Physics & Astronomy, Seoul National University) ;
  • Lim, Gu (Astronomy Program, Department of Physics & Astronomy, Seoul National University) ;
  • Jeong, Mankeun (Astronomy Program, Department of Physics & Astronomy, Seoul National University) ;
  • Kang, Wonseok (National Youth Space Center) ;
  • Kim, Taewoo (National Youth Space Center) ;
  • Burkhonov, Otabek (Ulugh Beg Astronomical Institute, Uzbek Academy of Sciences) ;
  • Mirazaqulov, Davron (Ulugh Beg Astronomical Institute, Uzbek Academy of Sciences) ;
  • Ehgamberdiev, Shyhrat A. (Ulugh Beg Astronomical Institute, Uzbek Academy of Sciences) ;
  • Seo, Jinguk (Astronomy Program, Department of Physics & Astronomy, Seoul National University) ;
  • Lee, Chung-Uk (Korea Astronomy and Space Science Institute) ;
  • Kim, Seung-Lee (Korea Astronomy and Space Science Institute) ;
  • Sung, Hyung-Il (Korea Astronomy and Space Science Institute)
  • Published : 2021.04.13
Download PDF
⟨ Previous Next ⟩

Abstract

We report the optical follow-up observations of three long γ-ray burst events, GRB 201020A, GRB 201103B and GRB 210104A by the network of telescopes in the SomangNet project. We show light curves, color evolution and SED evolution, and fit them to a single power law function to derive decay index and compare their properties with other long GRBs samples. Also, we show a good observational example that 0.4-1m class telescopes in SomangNet have potential to catch dim light from high red shift object (R>22 mag) by deep imaging. In conclusion, we found that three GRBs have optical afterglow properties of long GRB and our results are consistent with the reports of high energy analysis.

Keywords