{
  "bibcode": "2020GCN.28689....1K",
  "body": "A. Kumar (ARIES), R. Gupta (ARIES), Dimple (ARIES), A. Ghosh (ARIES), A.\nAryan (ARIES), B. Kumar (ARIES), N Panwar (ARIES), S. B. Pandey (ARIES),\n\nand K. Misra (ARIES) report:\n\n\nWe observed the XRT localized GRB 201014A (Swift trigger =1000255, Ambrosi\net al., GCN 28623; Perri et al., GCN 28638) using the 4Kx4K CCD Imager\n(Pandey et al. 2018, 2018BSRSL..87...42P) mounted at axial port of the 3.6m\nDevasthal Optical Telescope (DOT) of ARIES Nainital. The observations were\ncarried out on 2020-10-15 in Bessel R-band (300s X 2 frames) from UT\n21:22:35 to 21:32:59 (corresponding to 22.6 hours after the BAT trigger\ntime).\n\n\nNo new optical source was detected within the Swift XRT enhanced error\ncircle (see also Pozanenko et al., GCN 28628; de Ugarte Postigo et al, GCN\n28650, Zhu et al, GCN 28655). The aperture photometry on the stacked R-band\nimage was performed and calibrated against the USNO-B1 nearby stars.\n\n\nThe 3-sigma upper limit within the XRT error circle is as follows:\n\n\nT_start-T0 (hours),       Start UT,            End UT,          Filter,\n3-sigma upper limit\n\n-------------------------------------------------------------------------------------------------\n22.57, 2020-10-15 UT 21:22:35.8, 2020-10-15 UT  21:32:58.9,  R, >22.5 mag\n\n\nThe limiting magnitude is not corrected for Galactic extinction in the the\ndirection of the GRB.\n\n\n3.6m Devasthal Optical Telescope (DOT) is a recently commissioned\nfacility in Northern Himalayan region of India (long:79 41 04E, lat:29\n21 40N, alt:2540m)\nowned and operated by the Aryabhatta Research Institute of\nObservational Sciences (ARIES), Nainital (https://www.aries.res.in).\nAuthors of this GCN circular thankfully acknowledge consistent support\nfrom the staff members to run and maintain the 3.6m DOT.\nThis circular may be cited.",
  "circularId": 28689,
  "createdOn": 1603119681000,
  "email": "amitkundu515@gmail.com",
  "subject": "GRB 201014A: 3.6m DOT Optical Observations",
  "submitter": "Amit Kumar at ARIES, India  <amitkundu515@gmail.com>",
  "eventId": "GRB 201014A"
}