TITLE: GCN CIRCULAR NUMBER: 29451 SUBJECT: GRB 210208A: GIT optical upper limit DATE: 21/02/10 11:38:40 GMT FROM: Harsh Kumar at Indian Inst of Tech,Bombay H. Kumar(IITB), S. Joharle(Fergusson College), J. Stanzin (IAO), V. Bhalerao(IITB), G. C. Anupama(IIA), S. Barway(IIA) report on behalf of the GIT team: We observed GRB 210208A detected by INTEGRAL (S. Mereghetti et. al., GCN #29429) with 0.7m GROWTH-India Telescope (GIT). We obtained four exposures of 300-sec each in the r' filter. We did not detect any new source in our stacked image within the 2 arcmin circle around R.A.= 260.1976 deg, DEC.= -12.6667 deg. The obtained upper limit follows as: ----------------------------------------------------------------- JD (mid) | T_mid-T0(hrs) | Exposure | Filter | Lim_mag (5-sigma) | ----------------------------------------------------------------- 2459254.51368 | 10.78 | 300*4 (stacked) | r' | > 21.1 | ----------------------------------------------------------------- The magnitudes are calibrated against PanSTARRS (Flewelling et al., 2018) and not corrected for galactic extinction. The GROWTH India Telescope (GIT) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics and the Indian Institute of Technology Bombay with support from the Indo-US Science and Technology Forum (IUSSTF) and the Science and Engineering Research Board (SERB) of the Department of Science and Technology (DST), Government of India (https://sites.google.com/view/growthindia/). It is located at the Indian Astronomical Observatory (Hanle), operated by the Indian Institute of Astrophysics (IIA).