GCN Circular 869
B. Altieri, N. Schartel, M. Santos, L. Tomas, M. Guainazzi (XMM-Newton SOC, ESA ), L. Piro (IAS/CNR), A. Parmar (SSD/ESA) report: XMM-Newton observed the location of GRB001025 (Hurley et al. GCN 864) from Oct.27.003 to Oct.27.46 UT, i.e. 1.9 days after the burst. Preliminary analysis of the EPIC-pn and EPIC-MOS images show the presence of at least 4 sources in the error box. The brighter source (S1) has a flux of about 1-2 10**-13 erg/cm2/s in the 0.5-10 keV range. We cannot exclude a decay by about 40% over the whole observation, that would be expected from a decay power law with a slope of -1.5, the average value observed in X-ray afterglows. The remaining sources (S2, S3 & S4) are too faint to constrain the variability. The following coordinates have been derived with a preliminary attitude reconst ruction (equinox 2000): S1 R.A.= 8h36m38.7s Decl.= -13 06' 00" S2 R.A.= 8h36m30.1s Decl.= -13 05' 31" S3 R.A.= 8h36m30.5s Decl.= -13 03' 48" S4 R.A.= 8h36m48.6s Decl.= -13 05' 47" At this stage of reduction the error is expected to be less than 20". Refined coordinates will be distributed as soon as the final attitude reconstruction is obtained.