GCN Circular 2241
A.Tiengo (IASF-Milano), S.Mereghetti (IASF-Milano), and N.Schartel (XMM-Newton SOC, Villafranca) report: An XMM-Newton TOO observation of GRB030329 (Ricker et al. IAU Circ. 8101) has been performed on May 5, 2003 from 12:30 to 24 UT. A source positionally consistent with the optical transient of GRB030329 (Price and Peterson, GCN 1987) has been detected with the EPIC MOS and PN cameras. Its spectrum can be fit by a power law with photon index 2.0+/-0.25 and absorption smaller than 6x10^20 cm^-2. The 2-10 keV observed flux is (2.1+/-0.6)x10^-14 erg cm^-2 s^-1. Comparison with previous X-ray observations obtained with RXTE (Marshall and Swank, GCN 1996; Marshall et al., GCN 2052) indicates that the X-ray flux decay is consistent with a power law F ~ t^(-1.7).