{
  "bibcode": "2020GCN.28789....1K",
  "body": "Amit Kumar (ARIES), Rahul Gupta (ARIES), Ankur Ghosh (ARIES), Dimple\n(ARIES), Kaushal Sharma (ARIES), Amar Aryan (ARIES), Shashi B. Pandey\n(ARIES), and Kuntal Misra (ARIES) report:\n\nWe observed the field of GRB 201020A (E. Ambrosi et al., GCN 28696)\nwith the 1.3m Devasthal Fast Optical Telescope (DFOT)\nat Devasthal observatory of Aryabhatta Research Institute of\nobservational sciencES (ARIES), India.\n\nMultiple frames of the GRB field were obtained in the Bessel R and\nI-bands (15*120sec in each filter).\nPreliminary photometry on stacked images were performed and calibrated\nagainst nearby USNO-B1 stars.\nWe do not detect any OT candidate (see Adachi et al. GCN 28697;\nLipunov et al. GCN 28700; Fu et al. GCN 28701;\nBelkin et al. 28703; Pankov et al. GCN 28708; Kumar et al. GCN 28711;\nPaek et al. 28713; Kann et al. 28717; Gokuldass et al. 28737; Siegel\net al. 28742 and Kumar et al. GCN 28747) within the enhanced XRT\nposition (Osborne et al., GCN 28698).\n\nThe 3-sigma upper limits at the location of the afterglow are as follows:\n\nDATE       Start UT   Filter  Exposure(sec)    Lim_mag (3-sigma)\n2020-10-24 12:51:08    I        15*120            >22.1\n2020-10-24 13:23:45    R        15*120            >22.5\n\nThe estimated magnitudes have not been corrected for the Galactic\nextinction in the direction of the GRB. This massage may be cited.",
  "circularId": 28789,
  "createdOn": 1603776861000,
  "email": "amitkundu515@gmail.com",
  "subject": "GRB 201020A: 1.3m DFOT, optical upper limits",
  "submitter": "Amit Kumar at ARIES, India  <amitkundu515@gmail.com>",
  "eventId": "GRB 201020A"
}