Soft X-ray observation of the prompt emission of GRB 100418A

Ritsuko Imatani, Hiroshi Tomida, Satoshi Nakahira, Masashi Kimura, Takanori Sakamoto, Makoto Arimoto, Yoshitaka Morooka, Daisuke Yonetoku, Nobuyuki Kawai, Hiroshi Tsunemi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We have observed the prompt emission of GRB 100418A from its beginning captured by the MAXI SSC (0.7-7 keV) on board the International Space Station followed by the Swift XRT (0.3-10 keV) observation. The light curve can be fitted by a combination of a power-law component and an exponential component (the decay constant is 31.6 ± 1.6 s). The X-ray spectrum is well expressed by the Band function with Ep ≤ 8.3 keV. This is the brightest gamma-ray burst showing a very low value of Ep. It satisfies the Yonetoku relation (Ep-Lp). It is also consistent with the Amati relation (Ep-Eiso) within a 2.5σ level.

Original languageEnglish
Pages (from-to)S291-S297
JournalPublications of the Astronomical Society of Japan
Publication statusPublished - 2016 Jun 1
Externally publishedYes


  • gamma-ray burst: general
  • gamma-ray burst: individual(GRB 100418A)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Soft X-ray observation of the prompt emission of GRB 100418A'. Together they form a unique fingerprint.

Cite this