{
  "bibcode": "2020GCN.29148....1D",
  "body": "Dimple (ARIES), A. Panchal (ARIES), A. Gangopadhyay (ARIES), A. Ghosh\n(ARIES), R. Gupta (ARIES), A. Kumar (ARIES), K. Misra (ARIES), and S. B.\nPandey (ARIES) report:\n\nWe carried out the follow-up observations of GRB 201221D (Page et al., GCN\n29112) with Aries Devasthal Faint Object Spectrograph and Camera (ADFOSC)\nmounted on the 3.6m Devasthal Optical Telescope (DOT) at Devasthal\nobservatory of Aryabhatta Research Institute of observational sciencES\n(ARIES), India. The observations were started on 2020-12-22 at 23:10:00 UT.\nWe observed a series of 4 images with the exposure time of 900 seconds each\nin r-band. At the position reported by Malesani et al., (GCN 29117), we\ndetect an uncatalogued source in r-band with a magnitude of 23.46 +- 0.09\n(AB mag), calibrated with the nearby PanSTARRS field. However, we remark\nthat this is an extended source and may contain significant host galaxy\ncontribution. For further verification, host galaxy subtraction is highly\nencouraged.\n\nThe magnitude is not corrected for the Galactic extinction in the direction\nof the burst.\n\nThis circular may be cited.",
  "circularId": 29148,
  "createdOn": 1608726466000,
  "email": "rahulbhu.c157@gmail.com",
  "subject": "GRB 201221D: 3.6m DOT optical observations",
  "submitter": "Rahul Gupta at ARIES, India  <rahulbhu.c157@gmail.com>",
  "eventId": "GRB 201221D"
}