* Astronomy

Title: Swift uncovers that SAX J0840.7+2248 is not an X-ray Binary, but BeppoSAX X-ray Rich GRB 980429
Authors: P. Romano, C. Guidorzi, L. Sidoli, E. Montanari, F. Capitanio, L. Amati, A. Cucchiara, F. Frontera, N. Masetti, S. Mereghetti, F. Rossi

During our Swift/XRT program to obtain X-ray positions at arcsecond level for a sample of Galactic X-ray binaries, we discovered that SAX J0840.7+2248 is not a binary, but rather BeppoSAX/WFC+GRBM X-ray Rich GRB 980429. Here we report on this discovery and on the properties of this long, X-ray rich gamma-ray burst, from prompt to (very) late followup.

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