{
  "bibcode": "2025GCN.39859....1Y",
  "createdOn": 1742816460906,
  "submittedHow": "web",
  "subject": "GRB 250322A: VLT/X-shooter redshift confirmation of the putative host galaxy ",
  "submitter": "Yu-Han Yang at University of Rome Tor Vergata <yyang@roma2.infn.it>",
  "format": "text/markdown",
  "body": "Yu-Han Yang (U Rome), Eleonora Troja (U Rome), Rosa Becerra (U Rome), Massine El Kabir (U Rome)  report on behalf of the ERC BHianca team:\n\nWe observed the bright galaxy within the localization of GRB 250322A (Gupta et al., GCN 39835, Goad et al. GCN 39841, Martin-Carillo et al. GCN 39842) with the X-Shooter spectrograph on the ESO VLT UT3 (Melipal). Observations began at T+32.2 hours and obtained a total of 2x600s spectra at an average airmass of about 1.2 and seeing of 0.6”. \n\nWe detect a bright continuum in the VIS and NIR arms and identify multiple emission lines, including H_alpha, H_beta, NII, OII, SII, at a common redshift of 0.4215±0.0005, consistent with measurement by Fong et al. (GCN 39852). We estimated that the chance coincidence between the bright galaxy and the XRT localization is <2% (Bloom et al. 2002), supporting it as a likely host galaxy of the GRB.\n\nWe thank the staff at the VLT, for the rapid execution of these observations.\n",
  "eventId": "GRB 250322A",
  "circularId": 39859
}