TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2697 SUBJECT: GRB040903, REM near-IR observation DATE: 04/09/07 12:51:21 GMT FROM: Vincenzo Testa at INAF/Astro. Obs. of Rome V. Testa (INAF-OAR), S. Covino (INAF-OAB), L.A.Antonelli (INAF-OAR), F.M.Zerbi (INAF-OAB), G. Chincarini(Univ. Milano Bicocca, INAF-OAB) on behalf of the REM/ROSS team report The robotic telescope REM observed the field of GRB040903 (IBAS #alert 1972, Gotz et al., GCN 2690) with the IR camera REMIR in the filter H starting on Sept. 03 at UT 22:58, 4.67 hrs after the first INTEGRAL alert. Due to the poor weather conditions only one set of five 1s dithered images, for a total exposure time of 5s, was acquired. The acquisition and image preprocessing were done automatically. The photometry was calibrated with a subset of the 2MASS catalog. Off-line analysis revealed no evident new sources, compared to the 2MASS catalog, within the error circle of INTEGRAL. The detection upper limit (3 sigma) is H=15.2 and the extinction in the area is A_H=2.56. This message can be cited.