{
  "bibcode": "2022GCN.31892....1K",
  "body": "H. Kumar (IITB), V. Swain (IITB), R. Norbu (IAO), G. C. Anupama (IIA), V.\nBhalerao (IITB), S. Barway (IIA) report on behalf of the GIT team:\n\nWe observed the short GRB 220412B detected by Swift-BAT (J.D. Gropp et al.,\nGCN #31886) with the 0.7m *GROWTH-India Telescope* (GIT). We obtained multiple\n300-sec exposures in the r' filter. We did not detect any new source in our\nstacked image within the BAT uncertainty region of 3 arcmin circle, around\nR.A.= 320.794, DEC.= -0.223. The obtained upper limit follows as:\n\n-------------------------------------------------------------------------\n\n JD (mid) | T_mid-T0(hrs) | Exposure (sec) | Filter | Lim_mag (5-sigma) |\n\n-------------------------------------------------------------------------\n\n2459682.452891 | 5.75 | 300 x 6 (stacked) | r' | > 20.25 |\n\n-------------------------------------------------------------------------\n\nOur upper limit is consistent with results from K. L. Murata et al. (GCN\n#31889). The magnitudes are calibrated against Pan-STARRS DR1 (Chambers et\nal., 2016) and not corrected for Galactic extinction.\n\nThe GROWTH India Telescope (GIT) is a 70-cm telescope with a 0.7-degree\nfield of view, set up by the Indian Institute of Astrophysics (IIA) and the\nIndian Institute of Technology Bombay (IITB) with funding from DST-SERB and\nIUSSTF. It is located at the Indian Astronomical Observatory (Hanle),\noperated by IIA. We acknowledge funding by the IITB alumni batch of 1994,\nwhich partially supports operations of the telescope. Telescope technical\ndetails are available at https://sites.google.com/view/growthindia/.",
  "circularId": 31892,
  "createdOn": 1649839660000,
  "email": "harshkosli13@gmail.com",
  "subject": "GRB 220412B: GIT optical upper limit",
  "submitter": "Harsh Kumar at Indian Inst of Tech,Bombay  <harshkosli13@gmail.com>",
  "eventId": "GRB 220412B"
}