{
  "bibcode": "2019GCN.24440....1D",
  "body": "Dillon Dong (Caltech), Gregg Hallinan (Caltech), Dale Frail (NRAO) and\nKunal Mooley (NRAO/Caltech) report:\n\nThe VLA Sky Survey observed a field containing the nuclear optical\ntransient  ZTF19aassfws (Perley et al., GCN 24331) on 2019-04-12 at UT\n14:16:53, 14 days prior to the compact object merger candidate S190426c\n(LVC et al.; GCN 24237). There is no archival 3GHz source at the\ntransient location, with a local 3 sigma upper limit of 390uJy. This\nrules out a radio-luminous AGN with a specific luminosity greater than\n9x10^28 erg/s/Hz at the spectroscopic redshift reported by Cenko (GCN\n24430).\n\nThe VLA Sky Survey (VLASS) is a multi-epoch, 2-4 GHz survey with the\nKarl G. Jansky Very Large Array (VLA) covering the full sky north of\ndeclination = -40 degrees at ~2.5\" resolution to a 1-sigma depth of\n~120uJy/beam per epoch. Observations and data reduction for the VLASS\nare carried out by staff of the National Radio Astronomy Observatory\n(NRAO). The NRAO is a facility of the National Science Foundation\noperated under cooperative agreement by Associated Universities, Inc.",
  "circularId": 24440,
  "createdOn": 1557467263000,
  "email": "gh@astro.caltech.edu",
  "subject": "LIGO/Virgo S190426c: Archival VLASS Observations of ZTF19aassfws 14 days prior to Merger",
  "submitter": "Gregg Hallinan at OVRO-LWA  <gh@astro.caltech.edu>",
  "eventId": "LIGO/Virgo S190426c"
}