GCN Circular 7198
P. Schady (MSSL-UCL) and B. Sbarufatti (INAF-IASF PA) report on behalf of the Swift UVOT team: Swift UVOT started a ToO observation of the INTEGRAL burst GRB080120 at 2008-01-20T19:50 UT, ~2.4hrs after the INTEGRAL trigger (Mereghetti et al., GCN 7194). Observations were taken in the white and v-band only. A new source is detected within the XRT error circle (Sbarufatti & Mangano, GCN7195), in co-added images in both these filters at RA: 15:01:03.276 DEC: -10:52:29.79 with an uncertainty of 0.6 arcsec (90% confidence). This is consistent with the position reported by Kruehler et al. (GCN 7197). The source is seen to decay in the white band and has the following magnitudes and 3-sigma upper limits (in the UVOT photometric system,Breeveld et al., GCN Circ. 6614) Filter Tstart Exp Magnitude (s) (s) white 9257 401 21.45 +/- 0.39 white 14524 679 > 22.08 v 8490 746 20.45 +/- 0.41 v 13232 126 20.53 +/- 0.33 The values quoted above are not corrected for the expected non-negligible Galactic extinction corresponding to a reddening of E(B-V) = 0.10 mag in the direction of the burst (Schlegel et al. 1998).