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X/gamma-ray measurements of the faint GRB 020321

J. J. M. in 't Zand,L. Kuiper,J. Heise,L. Amati,E. Costa,M. Feroci,F. Frontera,G. Gandolfi,L. Nicastro,L. Piro,P. Rodriguez-Pascual,M. Santos-Lleo,N. Schartel

ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES（2004）

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Abstract
GRB 020321 is a faint GRB that received wide follow-up attention in X-rays (BeppoSAX/NFI, Chandra/ACIS-S, XMM-Newton), radio (ATCA) and optical (ESO, HST). We identify a weak X-ray afterglow by a combined study of the Chandra and XMM-Newton observations. Its decay index of 1.2 is typical for GRB afterglows. Inside the 4" accurate error box there is a weak optical counterpart candidate with a much shallower decay index.
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Key words
indexation,gamma ray
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