GCN Circular 2522
D.B. Fox, A.M. Soderberg, and S.R. Kulkarni (Caltech), with D. Frail (NRAO) report: "We have observed the X-ray afterglow of GRB031203 (Tedds et al., GCN 2490) with the Chandra X-ray Observatory, in a single 21.6 ksec exposure beginning at 21:35 UT on 22 January 2004 (mean epoch 49.1 days post-burst). At the XMM position derived by Tedds et al. (GCN 2490) we observe a single point-like source with a net count rate of 0.56 +/- 0.16 counts per ksec. Converting this count rate into a flux using the power-law (index 1.7) spectrum found by Vaughan et al. (GCN 2489), and assuming a hydrogen column of 6.2E+21 cm**-2, we find a 2-10 keV X-ray flux of approximately 6.4E-15 erg cm**-2 s**-1. This corresponds to a power-law decay from the last epoch of XMM observations (approx. 3.6 days post-burst) of index alpha = -1.0 +/- 0.1."