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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2285 SUBJECT: GRB030329: second XMM-Newton observation DATE: 03/06/19 12:38:20 GMT FROM: Sandro Mereghetti at IASF/CNR <sandro@mi.iasf.cnr.it> A.Tiengo (IASF-Milano), S.Mereghetti (IASF-Milano) and N.Schartel (XMM-Newton SOC, Villafranca) report: A 24 hour long observation of GRB030329 has been obtained with XMM-Newton starting at 21 UT on May 28, 2003. After rejecting high background time intervals, the net exposure time in the EPIC instrument is about 40 ks. The X-ray afterglow is detected at a level of (7+/-3)x10^-15 erg cm^-2 s^-1 (observed flux in the 2-10 keV range). This value is consistent with the late time (t>1 day) flux evolution as a power law with index ~1.9, as reported by Tiengo et al. (astro-ph/0305564). The X-ray spectrum is well fit by a power law with photon index 2.2+/-0.4 and absorption <9x10^20 cm^-2. This message may be cited.
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