GCN Circular 24440
Dillon Dong (Caltech), Gregg Hallinan (Caltech), Dale Frail (NRAO) and Kunal Mooley (NRAO/Caltech) report: The VLA Sky Survey observed a field containing the nuclear optical transient ZTF19aassfws (Perley et al., GCN 24331) on 2019-04-12 at UT 14:16:53, 14 days prior to the compact object merger candidate S190426c (LVC et al.; GCN 24237). There is no archival 3GHz source at the transient location, with a local 3 sigma upper limit of 390uJy. This rules out a radio-luminous AGN with a specific luminosity greater than 9x10^28 erg/s/Hz at the spectroscopic redshift reported by Cenko (GCN 24430). The VLA Sky Survey (VLASS) is a multi-epoch, 2-4 GHz survey with the Karl G. Jansky Very Large Array (VLA) covering the full sky north of declination = -40 degrees at ~2.5" resolution to a 1-sigma depth of ~120uJy/beam per epoch. Observations and data reduction for the VLASS are carried out by staff of the National Radio Astronomy Observatory (NRAO). The NRAO is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.