{
  "bibcode": "2021GCN.29345....1D",
  "body": "Dimple (ARIES), A. Ghosh (ARIES), R. Gupta (ARIES), A. Kumar (ARIES), K.\nMisra (ARIES), S.B. Pandey (ARIES) report:\n\nWe carried out the follow-up observations of  the MASTER OT\nJ105242.66+152355.0 / AT2021axc (Lipunov et al., GCN  #29339) in the field\nof Fermi GRB 210120A  (Fermi GBM Team, GCN\n29334; Biltzinger et al., GCN #29335) with 1.3m Devasthal Fast Optical\nTelescope (DFOT) at Devasthal observatory of Aryabhatta Research Institute\nof observational sciencES (ARIES), India. The observations started on\n2021-01-21 at 20:51:55 in R-band. We observed a set of 18 images with an\nexposure time of 300 seconds each, centered at 1.5937 days after the burst.\nWe clearly detect the optical afterglow candidate reported by  Lipunov\net al., GCN  #29339  in the stacked image with a magnitude of  22.60+-0.16. The\nobject is fading with time (S. Belkin et al. GCN #29341; Lipunov et al.,\nGCN  #29339) which supports it as an afterglow candidate for GRB 210120A.\n\nThe magnitude is not corrected for the Galactic extinction in the direction\nof the burst. The photometric calibration is performed using the standard\nstars from the USNO-B1.0 catalog.",
  "circularId": 29345,
  "createdOn": 1611347752000,
  "email": "dimplepanchal96@gmail.com",
  "subject": "GRB 210120A : 1.3m DFOT optical observations",
  "submitter": "Dimple Panchal at ARIES, India  <dimplepanchal96@gmail.com>",
  "eventId": "GRB 210120A"
}