{
  "bibcode": "2020GCN.28959....1W",
  "body": "Alan M. Watson (UNAM), Nat Butler (ASU), Rosa L. Becerra (UNAM), Simone Dichiara\n(GSFC/UMD), Alexander Kutyrev (GSFC/UMD), William H. Lee (UNAM), Oc��lotl Lopez\n(UNAM), Diego Gonzalez (UNAM), Margarita Pereyra (UNAM), Srihari Ravi (ASU), and\nEleonora Troja (GSFC/UMD) report:\n\nWe observed the field of GRB 201128A (Lien et al., GCN Circ. 28958) with with\nthe DDOTI/OAN wide-field imager at the Observatorio Astron��mico Nacional on\nSierra San Pedro Martir (http://ddoti.astroscu.unam.mx) on the night of\n2020-11-28 UTC.\n\nWe observed from 2020-11-30 12:45 to 13:07 (from 6.3 to 6.7 hours after the\ntrigger) obtaining a total of 960 seconds exposure in the w filter. We calibrate\nour images against the APASS catalog. Our 5-sigma limiting magnitude is w =\n20.4.\n\nComparing our observations to the USNO-B1 and PanSTARRS PS1 DR2 catalogs, we\ndetect no uncatalogued sources in the Swift/XRT error region (Lien et al., GCN\nCirc. 28958 to our 5-sigma limit.\n\nWe thank the staff of the Observatorio Astronomico Nacional in San Pedro Martir.",
  "circularId": 28959,
  "createdOn": 1606576310000,
  "email": "alan@astro.unam.mx",
  "subject": "GRB 201128A: DDOTI Observations",
  "submitter": "Alan M Watson at UNAM  <alan@astro.unam.mx>",
  "eventId": "GRB 201128A"
}