TITLE: GCN CIRCULAR NUMBER: 7162 SUBJECT: Bright X-ray transient / possible XRF in NGC 2770: TNG R imaging DATE: 08/01/11 06:56:21 GMT FROM: Paolo D'Avanzo at INAF-OAB V. D'Elia, L.A. Antonelli (INAF/OAR), S. Covino (INAF/OABr), E. Maiorano (INAF/IASF Bo), A. Magazzu' and N. Pinilla-Alonso (INAF/TNG), report on behalf of the CIBO collaboration: We took a 300s R-band image of NGC 2770 on 2008 Jan 11, starting at 01:30:14 UT, with the DOLoRes camera on the TNG telescope located in the Canary Islands (Spain). An optical source, likely coincident with the object reported by Deng & Zhu (GCN 7160) and Thoene et al. (GCN 7161), is clearly detected at a position consistent with that reported for the X-ray transient (Berger & Soderberg, GCN 7159). The coordinates of the object are (J2000): RA: 09:09:30.65 Dec: +33:08:20.3 with an estimated error of 0.3" (against USNO-B1.0). We estimate the magnitude to be R~18.0 based on the USNO catalog (e.g. assuming R=17.2 for the star at 09:09:37.28, +33:09:35.1). A finding chart is posted at the following link: http://www.brera.inaf.it/utenti/davanzo/public/grb/XRF080109/080109_finder.jpg Further analysis is underway.