TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2708 SUBJECT: GRB 040912, BVRI observations DATE: 04/09/13 14:52:02 GMT FROM: Sylvio Klose at TLS Tautenburg S. Klose, U. Laux, Thueringer Landessternwarte Tautenburg, J. Greiner, MPE Garching, report: The error circle of GRB 040912 (HETE trigger 3557; Butler et al., GCN 2701) was imaged in BVRI with the Tautenburg Schmidt telescope equipped with the prime focus CCD camera (field of view ~40'x 40'). Observations started Sep 12, 19:34 UT, about 5 hours after the burst, and lasted for altogether 6 hours. During the observing run the sky conditions were good. Based on the USNO SA2.0 catalogue (Monet et al. 1996), we estimate a limiting magnitude of R = 22.5 for the combined R-band image. The combined I-band image goes about 2 mag deeper than the DSS2 infrared image, while the combined B-band image is about 1 mag less deep than the DSS1. In addition to the reported non-detections in the R-band (Pimbblet & Price, GCN 2702; Monard, GCN 2703; Ogura et al., GCN 2705; Andersen et al., GCN 2707) we can state that there is no I-band candidate down to the DSS2 infrared plate limit. There is also no evidence for any point source in R and I potentially superimposed one of the two brightest galaxies in the field. There is no potential afterglow candidate in the B-band.