TITLE: GCN CIRCULAR NUMBER: 29656 SUBJECT: GRB 210226A: GIT optical upper limit DATE: 21/03/15 11:33:03 GMT FROM: Harsh Kumar at Indian Inst of Tech,Bombay H. Kumar(IITB), K. Sharma (IITB), U. Stanzin (IAO), A. Dutta(IIA), V. Bhalerao(IITB), G. C. Anupama(IIA), S. Barway(IIA) report on behalf of the GIT team: We observed GRB 210226A detected by Swift-BAT (A. P. Beardmore et al., GCN 29568) with 0.7m GROWTH-India Telescope (GIT). We obtained 10 exposures of 300 sec each in the r' filter. We did not detect any new source in our stacked image within the 1.5 arcsec circle around R.A.= 08h 16m 27.67s, DEC.=+57d 35' 02.2". The obtained upper limit follows as: ------------------------------------------------------------------- JD (mid) | T_mid-T0(hrs) | Exposure (sec) | Filter | Lim_mag (5-sigma) | ------------------------------------------------------------------- 2459272.1074 | 9.84 | 3000 (stacked) | r' | > 20.34 | ------------------------------------------------------------------- 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).