{
  "eventId": "GRB 250322A",
  "submitter": "Rosa L. Becerra at Tor Vergata, Roma <rosa.becerra@roma2.infn.it>",
  "circularId": 39844,
  "submittedHow": "web",
  "bibcode": "2025GCN.39844....1B",
  "format": "text/plain",
  "createdOn": 1742697638019,
  "subject": "GRB 250322A: VLT near-infrared observations",
  "body": "Rosa Becerra (U Rome), Yu-Han Yang (U Rome), Eleonora Troja (U Rome) report on behalf of the ERC BHianca team:\n\nWe observed the field of GRB 250322A (Gupta et al., GCN 39835) with the HAWKI imager on the ESO VLT UT4 (Yepun). Observations began at T+7.4 hr with a total exposure of 360 sec in the J filter, and were carried out at an average airmass of about 1.2 and seeing of 0.56’’.\n\nWe do not detect any new source at the enhanced Swift-XRT position (Goad et al. GCN 39841) down to the following 5-sigma limit J>23.0 mag (Vega) calibrated using nearby stars in the 2MASS Catalogue. \n\nWe detect the host galaxy candidate reported by Martin-Carrillo et al. 2025 (GCN 39842) in our image. We estimate a preliminary magnitude of J=18.9±0.2 mag (Vega).\n\nFurther observations are planned to investigate potential variations in the brightness.\n\nWe thank the staff at the VLT, especially Thomas Rivinius, for the rapid execution of these observations. \n\n"
}