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INTEGRAL and XMM-Newton observations of the low-luminosity and X-ray-rich burst GRB 040223

McGlynn, S.; McBreen, S.; Foley, S. +6 more

GRB 040223 was observed by INTEGRAL and XMM-Newton. GRB 040223 has a peak flux of (1.6 ±0.13)×10^-8 ergs cm^-2 s^-1, a fluence of (4.4±0.4)×10^-7 ergs cm^-2 and a steep photon power law index of -2.3±0.2, in the energy range 20-200 keV. The steep spectrum implies it is an X-ray-rich GRB with emissi…

GRBs Optical follow-up observation at Lulin observatory, Taiwan

Ip, W. H.; Tamagawa, T.; Makishima, K. +3 more

The Lulin GRB program, using the Lulin One-meter Telescope (LOT) in Taiwan started in July 2003. Its scientific aims are to discover optical counterparts of XRFs and short and long GRBs, then to quickly observe them in multiple bands. Thirteen follow-up observations were provided by LOT between July 2003 and Feb. 2005. One host galaxy was found at…

Systematic analysis of X-ray GRB afterglows observed with XMM-Newton and Chandra

Piro, L.; Gendre, B.; Depasquale, M.

We present a sample of GRB afterglows observed in the X-ray band with XMM-Newton or Chandra, focusing on the brightest events. We have derived for this sample the temporal slope and the spectral index of the continuum, and used closure relationships to discriminate the afterglow environment for each burst. We show that jet features are excluded mo…