{
  "bibcode": "2020GCN.27800....1K",
  "body": "H. Kumar, V. Bhalerao(IITB), G. C. Anupama, S. Barway, U. Stanzin (IIA)\nreport on behalf of the GROWTH-India collaboration:\n\nWe followed up GRB 200524A (F. F. Dirirsa et al., GCN 27797, A. Ho et al.,\nGCN 27799) with 0.7m GROWTH-India telescope. We obtained 600-sec exposures\nin SDSS g, r, i filters starting at UT 2020-05-24T10:41:57 (~5.6 hrs after\nthe burst). We detect a faint transient with magnitudes r = 20.56 +- 0.14\nand i = 20.59 +- 0.28 (calibrated against PanSTARRs PS1 data release,\nFlewelling\net al., 2018). The source position matches with the likely afterglow\ncandidate by A. Ho et al. (GCN 27799). The fading rate is approximately 3\nmagnitudes in four hours, consistent with the fading rate reported in the\nZTF GCN. We hereby, confirm ZTF20abbiixp as the afterglow of GRB 200524A.\n\nWe obtained the following photometric results:-\n\n------------------------------------------------------------------\n\n JD(Start) | T-T0(hrs) | Filter | Mag |\n\n------------------------------------------------------------------\n\n2458993.946 | 5.64 | g | > 21.01 (5-sigma)\n\n2458993.954 | 5.83 | r | 20.56 +/- 0.14\n\n2458993.962 | 6.02 | i | 20.59 +/- 0.28\n\n------------------------------------------------------------------\n\nGiven the fast fading, we encourage the followup of the source. The\nmagnitudes are 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 and the\nIndian Institute of Technology Bombay with support from the Indo-US Science\nand Technology Forum (IUSSTF) and the Science and Engineering Research\nBoard (SERB) of the Department of Science and Technology (DST), Government\nof India (https://sites.google.com/view/growthindia/). It is located at the\nIndian Astronomical Observatory (Hanle), operated by the Indian Institute\nof Astrophysics (IIA).\n\n[GCN OPS NOTE(24may20):  Please see Circular 27804 for a correction to this Circular.]",
  "circularId": 27800,
  "createdOn": 1590350299000,
  "email": "harshkosli13@gmail.com",
  "subject": "GRB 200524A: GROWTH-India confirmation of optical afterglow",
  "submitter": "Harsh Kumar at Indian Inst of Tech,Bombay  <harshkosli13@gmail.com>",
  "eventId": "GRB 200524A"
}