TITLE: GCN CIRCULAR NUMBER: 8282 SUBJECT: GRB080922: Swift-XRT upper limit DATE: 08/09/23 07:16:06 GMT FROM: Valentina La Parola at INAF-IASPA B. Sbarufatti, V. La Parola, V. Mangano (INAF-IASFPa), on behalf of the Swift-XRT team At 2008-09-22 14:54UT Swift performed a TOO observation of the INTEGRAL burst GRB 080922 (Mereghetti et al., GCN Circ. 8281), 3h52m after the INTEGRAL trigger. No X-ray source was found in or near the IBAS error circle in a 5.9ks exposure Swift/XRT Photon Counting mode image down to a 3 sigma limiting 0.3-10keV count rate of 4.3e-3 count/s. Assuming a power-law spectrum of photon index 2 absorbed by the Galactic column density of 1.14e22 cm-2 in the direction of the burst, this corresponds to an observed 0.3-10keV flux limit of 2.55e-13 erg cm-2 s-1. This circular is an official product of the Swift-XRT team.