{
  "subject": "GRB 231117A: GTC Near-Infrared Observations",
  "circularId": 35153,
  "eventId": "GRB 231117A",
  "submitter": "Alan M Watson at UNAM <alan@astro.unam.mx>",
  "createdOn": 1700600730048,
  "bibcode": "2023GCN.35153....1W",
  "body": "Alan M. Watson (UNAM), Simone Dichiara (PSU), Eleonora Troja\n(Università di Roma Tor Vergata), Brendan O’Connor (CMU), Rosa L.\nBecerra (UNAM), Nathaniel R. Butler (ASU), Nissim Fraija (UNAM),\nWilliam Lee (UNAM), Océlotl López (UNAM), and Margarita Pereyra (UNAM)\nreport:\n\nWe observed the field of GRB 231117A (Laha et al., GCN 35071;\nNavaneeth et al., GCN 35072; Beardmore et al., GCN3574; Cattaneo et\nal., GCN 35075; Svinkin et al., GCN 35079; Cheung et al., GCN 35081;\nDafcikova et al., GCN 53095; Busman et al. GCN 35138; O'Connor et al.,\nGCN 35139) with the EMIR instrument on the GTC telescope from\n2023-11-19 19:33 to 19:57 UTC (64.5 to 64.9 hours after the trigger).\nWe obtained total integrations of 420 in J and 252 in Ks with a seeing\nof about 0.8 arcsec.\n\nFrom our preliminary analysis, the source is detected in all filters\nwith brightness J = 20.9 +/- 0.1 AB, with an uncertain contribution\nfrom the host galaxy. This value is not corrected for Galactic\nextinction.\n\nFurther observations are planned.\n\nWe thank the staff of the GTC, including Riccardo Scarpa and Antonio\nCabrera, for their help with these observations.\n\n",
  "submittedHow": "email-legacy"
}