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Paper: Multiwavelength Observations of the GRB000615 field
Volume: 312, Third Rome Workshop on Gamma-Ray Bursts in the Afterglow Era
Page: 221
Authors: Maiorano, E.; Masetti, N.; Palazzi, E.; Nicastro, L.; Pian, E.; Amati, L.; Frontera, F.; in 't Zand, J.J.M.; Stanek, K.Z.
Abstract: We report on prompt and afterglow observations of GRB00615 detected by BeppoSAX. The study of the high-energy prompt event is presented along with the search for its X-ray and optical afterglow. Spectral fits seem to suggest a temporal evolution of the GRB prompt emission. We possibly find evidence for intrinsic NH (at 90% confidence level) and for a transient spectral emission feature around 8 keV (at 98% confidence level). The X-ray to γ-ray fluence ration of 1.73 ± 0.22 is one of the largest among BeppoSAX GRBs. A weak X-ray source is also detected in the MECS, between 1.6 and 4.5 keV, and its position is compatible with the WFC error box. The behaviour of ths source may be compatible with that of an afterglow. Low significance signal is detected in the 0.2-1.5 keV at a position consistent with the WFGC and MECS error boxes. The S/N ratio is insufficient to speculate on the nature of this source. There is no evidence of an optical transient down to R ~ 22.
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