TITLE: GCN CIRCULAR NUMBER: 8310 SUBJECT: GRB 081001: Observations from OSN DATE: 08/10/03 01:29:37 GMT FROM: Antonio Deugarte at IAA-CSIC A. de Ugarte Postigo (ESO, Santiago), F. Aceituno, M. Jelínek, J. Gorosabel and A.J. Castro-Tirado (IAA-CSIC, Granada) on behalf of a larger collaboration report, We have observed the field of the SuperAGILE GRB 081001 (Lazzarotto et al., GCN 8305) and in particular the Swift/XRT error box (Page et al., GCN 8307) from the 1.5m OSN telescope at Sierra Nevada Observatory in Granada (Spain). The observation consisted of 3x300s I-band exposures with a mean time of Oct 2.8348 UT (22.7 hours after the burst). We detect just one source on the edge of the XRT error box, located at the following coordinates (J2000 +/- 0.7"): R.A.: 18:26:21.65 Dec.: -08:43:07.6 With a magnitude of I = 19.90+/-0.26 as compared to several USNO-B1 stars. A finding chart (with the object is marked as A) can be found in: http://www.sc.eso.org/~adeugart/GRB/081001/081001.gif No variability can be established at this point. Rechecking of the unfiltered image reported by Jelínek et al. (GCN 8306) does not show any significant emission at the location of the object. Further observations would be needed in order to determine any relation of this source with the GRB.