TITLE: GCN CIRCULAR NUMBER: 19783 SUBJECT: Swift Trigger 707517 is not an astrophysical event DATE: 16/08/06 14:03:47 GMT FROM: Hans Krimm at NASA-GSFC J. L. Racusin (NASA/GSFC), P. D'Avanzo (INAF-OAB), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), A. Melandri (INAF-OAB), D. M. Palmer (LANL) and M. H. Siegel (PSU) report on behalf of the Swift Team: Further analysis of the Swift/BAT data from the Swift trigger 707517 (Racusin et al, GCN 19780) shows no significant features in the imageor the light curve. In 1.9 ks of XRT data, starting 0.3 ks after the trigger, no X-ray sourcesare detected within the BAT error circle, to a 3-sigma upper limit of 4.2e-3 count s^-1. For a typical GRB spectrum, this corresponds to a 0.3-10 keV observed flux limit of 1.6e-13 erg cm^-2s^-1. The combined data from BAT and XRT now show this trigger to be due to noise, and is not astrophysical.