{
  "bibcode": "2020GCN.26752....1D",
  "body": "Simone Dichiara (GSFC/UMD), Eleonora Troja (GSFC/UMD), Alan M. Watson\n(UNAM), Nat Butler (ASU), Alexander Kutyrev (GSFC/UMD), Margarita Pereyra\n(UNAM), Rosa L. Becerra (UNAM), Diego Gonzalez (UNAM), William H. Lee\n(UNAM) and Tanner Wolfram (ASU) report:\n\nWe observed LIGO/Virgo S200114f (Chatterjee et al, GCN Circ. 26734) with\nthe DDOTI/OAN wide-field imager at the Observatorio Astronomico Nacional on\nSierra San Pedro Martir (http://ddoti.astroscu.unam.mx) on the night of\n2020-01-14 UTC.\n\nWe tiled the LVC localization with four pointings spanning a region of\napproximately 13.6 degrees in RA and 20.4 degrees in DEC centered on the\npeak of the probability map at 07:20:09 +15:42:50 2000. This region covers\nabout 280 square degrees and includes about 80% of the probability in the\nmap. We observed from 2020-01-14 02:40 UTC to 2020-01-14 12:00 UTC (from 29\nminutes to 9.7 hours after the event) obtaining exposures of 53 to 65\nminutes across the field in the w filter.\n\nWe calibrate our images against the APASS catalog. Our 10-sigma limiting\nmagnitude are typically between w = 18.9 and w = 19.5.\n\nWe detect no uncatalogued sources within the observed field with\nsignificant fading or brightening.\n\nWe thank the staff of the Observatorio Astronomico Nacional in San Pedro\nMartir.",
  "circularId": 26752,
  "createdOn": 1579041515000,
  "email": "dichiara@umd.edu",
  "subject": "LIGO/Virgo S200114f: No Counterparts in DDOTI/OAN Optical Observations",
  "submitter": "Simone Dichiara at UMCP/NASA/GSFC  <dichiara@umd.edu>",
  "eventId": "LIGO/Virgo S200114f"
}