{
  "bibcode": "2018GCN.22302....1P",
  "body": "Miguel Perez-Torres (IAA-CSIC), S. Bradley Cenko (NASA), Assaf Horesh \n(HUJI),\nand Antxon Alberdi (IAA-CSIC) report:\n\nWe observed GRB 171205A (D'Elia et al., GCN 22177) with the Very Long\nBaseline Array (VLBA) on 2017 Dec 15.53 UT and 2017 Dec 16.56 at several\nfrequencies. We centered our observations at the VLA position of GRB \n171205A\n(Laskar et al., GCN 22216), and imaged a region of (0.5x0.5) sq. arcsec \naround it.\nAt a frequency of 4.4 GHz, we detect GRB 171205A with a preliminary peak \nflux\ndensity of ~2.3 mJy/beam at the following position:\n\nRA  =  11:09:39.5179609\nDec = -12:35:18.459250\n\nThe (preliminary) uncertainty on the position of the peak flux density \nis of\n~130 and ~50 microarcsec in RA and Dec, respectively.\n\nMore VLBI follow-up observations of GRB171205A are on the way.\nWe thank the NRAO staff for the time allocation and their help with the \nobservations.",
  "circularId": 22302,
  "createdOn": 1515177570000,
  "email": "torres@iaa.es",
  "subject": "VLBA detection of GRB 171205A",
  "submitter": "Miguel Perez-Torres at IAA-CSIC  <torres@iaa.es>",
  "eventId": "GRB 171205A"
}