{
  "eventId": "EP240913a",
  "body": "L. Asquini, M. Landoni, P. D'Avanzo, S. Campana (INAF-Brera), C. Farias (ESO/ La Silla) report:\n\n\nWe observed the field of EP 240913A (Li et al., GCN Circ. 37492), which has been proposed to be a GRB event (Yin et al., GCN Circ. 37493), with the ESO-NTT telescope equipped with EFOSC2 starting at 2024-09-14T05:58:49 UT (i.e. about 18.3 hours after the EP T0), during an on-site test run for the scheduler of the incoming SOXS instrument. \nObservations have been carried out in imaging mode with the Gunn r and i filters. \n\nNo optical counterpart is detected within the Swift-XRT error circle of the proposed X-ray counterpart (Jian et al., GCN Circ. 37497).\n\nFrom preliminary photometry, we estimate a 3sigma limit of r ~ 23.5 mag (AB; calibrated against the PanSTARRS catalogue),. \n\nFurther analysis is ongoing. \n",
  "subject": "EP240913a: ESO-NTT optical observations",
  "createdOn": 1726313168994,
  "bibcode": "2024GCN.37499....1A",
  "circularId": 37499,
  "submittedHow": "email",
  "submitter": "Paolo D'Avanzo at INAF - OAB <paolo.davanzo@inaf.it>"
}