TITLE: GCN CIRCULAR NUMBER: 29510 SUBJECT: GRB 210212A: 1.3m DFOT Optical upper limit DATE: 21/02/15 18:26:17 GMT FROM: Rahul Gupta at ARIES, India Rahul Gupta, A. Kumar, Dimple, A. Ghosh, A. Aryan, B. Kumar, S. B. Pandey, and K. Misra (ARIES) report: We observed the field of Swift detected GRB 210212A (Troja et al., GCN 29487) with 1.3m Devasthal Fast Optical Telescope (DFOT) located at Devasthal observatory of Aryabhatta Research Institute of Observational Sciences (ARIES), India. The observations were started on 2021-02-13 at 13:54:09 UT i.e. ~ 1.4 days after the BAT trigger. We have taken multiple frames having an exposure time of 180 s in the R filter. We did not detect any optical afterglow candidate within the Swift/XRT enhanced position (Beardmore et al., GCN 29489). We obtain the following 3-sigma upper limit in the stacked image. Date Start_UT T_start-T0 (days) Filter Exp time (s) Limiting Magnitude ====================================================== 2021-02-13 13:54:09 ~1.4 R 180*15 > 22.4 The magnitude is not corrected for the Galactic extinction in the direction of the burst. Photometric calibration is performed using the standard stars from the USNO-B1.0 catalogue. This circular may be cited.