TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2540 SUBJECT: RXTE GRB040229 optical observation: no candidate DATE: 04/03/05 06:51:25 GMT FROM: Vasilij Rumjantsev at CrAO V.Rumyantsev (CrAO) and A.Pozanenko (IKI) report: We have obtained 70 unfiltered images (120 s exposure each) of the GRB040229 error box (RXTE-ASM GRB040229). The images were taken with the AT-64 telescope of Crimean Astrophysical observatory and cover the period UT 22:04 Mar. 1 - 01:44 Mar. 2, 2004. We used CCD SBIG ST-8 with maximum of sensitivity in the red spectral band. No afterglow candidate was found in comparison with DSS2. We estimated the limiting magnitudes of combined images (S/N=3) as following Start time (UT) telescope exposure limiting mag. Mar. 29 22:04 AT-64 10x120 s 20.0 This message can be cited.