Soft X-ray Observation of the Prompt Emission of GRB100418A

Abstract

We have observed the prompt emission of GRB100418A, from its beginning 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 (decay constant is $31.6\pm 1.6$ sec). The X-ray spectrum is well expressed by the Band function with $E_{\mathrm{p}}\le$8.3 keV. This is the brightest GRB showing a very low value of $E_{\mathrm{p}}$. It satisfies the Yonetoku-relation ($E_{\mathrm{p}}$-$L_{\mathrm{p}}$). It is also consistent with the Amati relation ($E_{\mathrm{p}}$-$E_{\mathrm{iso}}$) in 2.5$\sigma$ level.

10pages, 5figures, 2tables

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Cited by in corpus (2)

• The luminous host galaxy, faint supernova and rapid afterglow rebrightening of GRB 100418A
• Exponentially Decaying Extended Emissions Following Short Gamma-Ray Bursts with Possible Luminosity -- E-folding Time Correlation