{
  "bibcode": "2019GCN.24978....1D",
  "body": "A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), M. Bremer (IRAM), \nS. Schulze (Weizmann), C. C. Thoene, D. A. Kann, L. Izzo, M. Blazek, \nK. Bensch (all HETH/IAA-CSIC), D. A. Perley (LJMU), S. Martin (ALMA), \nI. de Gregorio-Monsalvo (ESO), M. Michalowski (AOI-AMU), \nR. Sanchez-Ramirez (INAF-IAPS), D. B. Malesani (DTU Space) report:\n\nWe observed the field of the bright GRB 190530A (Fermi team GCN \n24676) with NOEMA, at wavelengths between 76 and 150 GHz in 4 \nepochs, ranging between 31 May 2019, at 14:29 UT (1.17 days after the \nburst) and 15 June 2019, at 20:54 UT (16.44 days after the burst). The \nafterglow (discovered in the optical by Lipunov et al. GCN 24680) was \ndetected on the first epoch with a flux density of 1.0 mJy at 92 GHz. At \nthis time the peak frequency was located close to this observed frequency.\n\nIn the subsequent epochs the peak frequency of the synchrotron spectrum \nwas bluewards of the 76 GHz frequency band and the source declined \nsteadily in flux density until it was no longer detected in our latest \nobservation, which had an r.m.s of 0.066 mJy at the 92 GHz band.",
  "circularId": 24978,
  "createdOn": 1562253774000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 190530A: Observation of the afterglow by NOEMA",
  "submitter": "Antonio de Ugarte Postigo at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 190530A"
}