GCN Circular 1996
Marshall, F.E. and Swank, J.H. (NASA/GSFC) report: RXTE detected the X-ray afterglow of GRB 030329 (HETE trigger 2652) during a 27 minute observation that began about 4h51m after the burst at 16:28 UT on March 29 . The flux was about 1.4e-10 ergs/s/cm**2 in the 2-10 keV band or about 0.007 times as bright as the Crab Nebula. This is one of the brightest afterglows ever detected with RXTE. The spectrum is well fit by a power law model with a photon index of 2.0 and an upper limit on absorption of 1e22 Nh/cm**2. The X-ray flux was about 20% lower during a second observation starting at 17:32 UT. This message may be cited.