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GRBs Observed by MAXI

  • M. Serino (a1), T. Sakamoto (a2), A. Yoshida (a2), N. Kawai (a3), M. Morii (a3), M. Sugizaki (a1), S. Nakahira (a4), H. Negoro (a5), T. Mihara (a1), Y. Nishimura (a6), Y. Ogawa (a6) and M. Matsuoka (a1)...

Abstract

Monitor of All-sky X-ray Image (MAXI) on board International Space Station is capable of observing gamma-ray bursts (GRBs) and sending notices of GRBs or other transient events, using real time connection to the ground. MAXI observed 32 GRBs or short X-ray transients as of the end of September 2012. Among them, eleven events were simultaneously detected by other satellites. The observed rate of the MAXI GRBs is about one event per month. This rate is comparable to a past observation with larger effective area and larger field of view. The fact indicates that MAXI has better sensitivity to observe GRBs because of low background. The distribution of the spectral hardness of MAXI GRBs is similar to the results of a past instrument, which is sensitive to similar energy range.

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[1] Heise, J., Zand, J.I., Kippen, R.M., et al., 2001, in “Gamma-ray Bursts in the Afterglow Era”, ed. E. Costa, F. Frontera & J. Hjorth, p. 16
[2]Matsuoka, M., Kawasaki, K., Ueno, S., et al., 2009, PASJ, 61, 999
[3]Mihara, T., Nakajima, M., Sugizaki, M., et al., 2011, PASJ, 63, S623
[4] Ricker, G.R., Atteia, J.-L., Crew, G.B., et al., 2003, in “Gamma-Ray Burst and Afterglow Astronomy 2001: A Workshop Celebrating the First Year of the HETE Mission”, ed. G.R. Ricker & R.K. Vanderspek, p. 3
[5]Sakamoto, T., Lamb, D.Q., Kawai, N., et al., 2005, ApJ, 629, 311
[6] Shirasaki, Y., Kawai, N., Yoshida, A., et al., 2003, PASJ 55, 1033
[7]Sugizaki, M., Mihara, T., Serino, M., et al., 2011, PASJ, 63, S635

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