{
  "bibcode": "1999GCN...212....1G",
  "body": "T.J. Galama, P. Vreeswijk, E. Rol (U. of Amsterdam), R. Strom (NFRA\nand U. of Amsterdam), J. van Paradijs (U. of Amsterdam and U. of\nAlabama in Huntsville), C. Kouveliotou (USRA/MSFC), G. de Bruyn (NFRA\nand U. of Groningen) report: \n\n\"We observed the error box of GRB 990123 (GCN #199) at 4.88 GHz with\nthe Westerbork Synthesis Radio Telescope (WSRT) for 12 hours on\nJanuary 24.28 1999 UT. At the position of the optical transient (GCN\n#201) we do not detect a radio source (< 130 microJansky; 3 sigma).\nThis result, when compared with the January 24.65 UT 8.46 GHz VLA\ndetection (260 +/- 32 microJansky; GCN #211) may be due to synchrotron\nself-absorption, or otherwise, may indicate that the 4.88 GHz\nobservation was suppressed by interstellar scintillation.  Further\nobservations are planned.\"\n\nThis message is citeable.",
  "circularId": 212,
  "createdOn": 917205556000,
  "email": "titus@astro.uva.nl",
  "subject": "GRB 990123 radio observations",
  "submitter": "Titus Galama at U.Amsterdam  <titus@astro.uva.nl>",
  "eventId": "GRB 990123"
}