{
  "bibcode": "2022GCN.32876....1K",
  "body": "H. Kumar (IITB), G. Waratkar, V. Swain (IITB), Anirban Dutta (IIA), G. C.\nAnupama(IIA), K. Angail (IAO), V. Bhalerao (IITB), S. Barway (IIA) report\non behalf of the GIT team:\n\nWe observed GRB 221028A detected by Swift (A. Y. Lien et al. GCN # 32874)\nwith 0.7m GROWTH-India Telescope (GIT). We obtained two 300-sec exposures\nin the r' filter. We did not detect any new source within a 5-arcsec radius\nuncertainty circle around the Swift-XRT position (A. Y. Lien et al. GCN #\n32874) in our stacked image. The upper limit follows as:\n\n-------------------------------------------------------------------\n\n JD (mid) | T_mid-T0(hrs) | Filter | Lim_Mag (5-sigma) |\n\n-------------------------------------------------------------------\n\n 2459881.102968 | 1.2 | r' | > 20.24 |\n\n-------------------------------------------------------------------\n\nThe magnitudes are calibrated against PanSTARRS DR1 (Chambers et al., 2016)\nand not corrected for Galactic extinction.\n\nThe GROWTH India Telescope (GIT; Kumar et al. 2022\n<https://iopscience.iop.org/article/10.3847/1538-3881/ac7bea>) is a 70-cm\ntelescope with a 0.7-degree field of view, set up by the Indian Institute\nof Astrophysics (IIA) and the Indian Institute of Technology Bombay (IITB)\nwith funding from DST-SERB and IUSSTF. It is located at the Indian\nAstronomical Observatory (Hanle), operated by IIA. We acknowledge funding\nby the IITB alumni batch of 1994, which partially supports the operations\nof the telescope. Telescope technical details are available at\nhttps://sites.google.com/view/growthindia/.",
  "circularId": 32876,
  "createdOn": 1666970769000,
  "email": "harshkosli13@gmail.com",
  "subject": "GRB 221028A: GIT optical upper limit",
  "submitter": "Harsh Kumar at Indian Inst of Tech,Bombay  <harshkosli13@gmail.com>",
  "eventId": "GRB 221028A"
}