{
  "bibcode": "2020GCN.26870....1D",
  "body": "Dimple, R. Gupta, V.K. Jha, A. Aryan, A. Ghosh, K. Misra, A. Kumar, and S.B. Pandey report: \n\nWe carried out observation of GRB 200122A (Sonbas et al., GCN Circ. 26844) with the 1.3m Devasthal Fast Optical Telescope (DFOT) at Devasthal observatory of Aryabhatta Research Institute of observational sciencES (ARIES), India. \nThe observation was started on 2020-01-23 at 10:29:41 UT. We observed a series of 3 x 300s exposures using R filter (Johnson-Cousins) covering Swift XRT enhanced position RA, Dec = 210.01807,+2754884 (Osborne et al., GCN Circ. 26846). \n\nWe do not detect any new optical source within the Swift XRT enhanced error circle neither in single images nor in the combined image. \n\nWe obtained the 3-sigma upper limit as follows \n\nT_start-T0 (hours) Start_UT End_UT Filter 3-sigma upper limit \n------------------------------------------------------------------------------------------------- \n8.8 10:29:41 10:44:41 R >21.13 \n------------------------------------------------------------------------------------------------- \n\nPhotometry is done based on USNO-B1.0 catalog. This magnitude is not corrected for Galactic extinction in the direction of the GRB.",
  "circularId": 26870,
  "createdOn": 1579877435000,
  "email": "dimple@aries.res.in",
  "subject": "GRB 200122A: Optical upper limit",
  "submitter": "Dimple Panchal at ARIES, India  <dimple@aries.res.in>",
  "eventId": "GRB 200122A"
}