TITLE: GCN CIRCULAR NUMBER: 13740 SUBJECT: GRB 120908A: Swift Observations DATE: 12/09/10 14:55:07 GMT FROM: Stefan Immler at NASA/GSFC S. Immler (CRESST/GSFC/UMD), C. Pagani (U. Leicester), and A. A. Breeveld (MSSL-UCL) report on behalf of the Swift team: Swift began a Target of Opportunity observation of the MAXI/GSC discovered burst GRB 120908A (Morii et al. GCN 13731) at 2012-09-09 13:41:43 UT. We have analyzed 3.7 ks of XRT data, starting ~54 ks after the MAXI trigger. The data are entirely in Photon Counting mode, centered on the MAXI position and partially covering the MAXI error region. No new source is detected in the XRT data. The 3-sigma upper limit is 0.004 counts/sec which is 2.4e-13 erg cm^-2 s^-1 for a typical GRB spectrum. The Swift/UVOT began settled observations of the field 54.4 ks after the MAXI trigger (Morii et al., GCN Circ. 13731). No optical afterglow consistent with the MAXI position given in that circular is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white 54383 66117 2345 >21.7 The magnitude in the table is not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.23 in the direction of the burst (Schlegel et al. 1998).