{
  "bibcode": "2023GCN.34641....1G",
  "submittedHow": "email",
  "circularId": 34641,
  "subject": "GRB 230818A: radio observation with the VLA",
  "eventId": "GRB 230818A",
  "submitter": "Stefano Giarratana at University of Bologna <s.giarratana@ira.inaf.it>",
  "body": "S. Giarratana (University of Bologna, INAF-IRA), M. Giroletti\n(INAF-IRA), G. Ghirlanda (INAF-OAB), N. Di Lalla (Stanford Univ.),\nN. Omodei (Stanford Univ.)\n\nAt 23:33:30 UT on 2023 August 23 (T_mid = 5.02 days post-burst) the\nKarl G. Jansky VLA observed the field of GRB 230818A (Fermi GBM\nteam, GCN 34478; Tohuvavohu et al., GCN 34479) at a central\nfrequency of 6 and 10 GHz.\n\nThe standard J1331+3030 was used as bandpass and flux density\ncalibrator, while J1912+3740 was used as phase calibrator.\n\nFrom a preliminary analysis, we do not detect the radio counterpart\nof GRB 230818A. The r.m.s. noise level of the images is\n11 uJy/beam and 13 uJy/beam at 6 and 10 GHz, respectively.\nThe synthesized beams are 0.44 x 0.89 arcsec (PA: 81 deg) at 6 GHz\nand 0.28 x 0.24 arcsec (PA: -70 deg) at 10 GHz.\n\nWe would like to thank the staff of the VLA for approving, executing,\nand processing the observations.\n\nThe National Radio Astronomy Observatory is a facility of the National\nScience Foundation operated under cooperative agreement by Associated\nUniversities, Inc.\n\nThese observations were carried out as part of project SF161095,\napproved in the framework of the Fermi - NRAO joint program agreement.\n",
  "createdOn": 1694178504571
}