{
  "bibcode": "2025GCN.41362....1B",
  "format": "text/plain",
  "submitter": "Rosa L. Becerra at Tor Vergata, Roma <rosa.becerra@roma2.infn.it>",
  "createdOn": 1755167175506,
  "eventId": "GRB 250814A",
  "subject": "GRB 250814A: DDOTI Optical Upper Limit",
  "body": "Rosa L. Becerra (U Roma), Alan M. Watson (UNAM), Sahil Atri (U Roma), Camila Angulo Valdez (UNAM), Nat Butler (ASU), Simone Dichiara (Penn State University), Tsvetelina Dimitrova (ASU), Alexander Kutyrev (GSFC/UMD), William H. Lee (UNAM), Océlotl López (UNAM), Margarita Pereyra (UNAM) and Eleonora Troja (U Roma) report:\n\nWe observed the field of GRB 250814A detected by Swift/BAT (Caputo et al., GCN Circ. 41358) with the DDOTI/OAN wide-field imager at the Observatorio Astronómico Nacional on Sierra San Pedro Mártir (http://ddoti.astroscu.unam.mx) on the night of 2025-08-14 UTC. \n\nDDOTI observed the XRT position (Caputo et al., GCN Circ. 41358) from 08:50 UTC to 09:18 UTC (from T+ 1.3 h to T+ 1.7 h after the trigger) and obtained a total exposure of 24 minutes.\n\nComparing our observations to the USNO-B1 and Pan-STARRS PS1 DR2 catalogues, we\ndetect no uncatalogued fading sources within the observed field down to a 3-sigma limiting AB magnitude of: \n\nw > 19.6\n\nThis value is not corrected for the Galactic extinction.\n",
  "submittedHow": "web",
  "circularId": 41362
}