TITLE: GCN CIRCULAR NUMBER: 21935 SUBJECT: LIGO/VIRGO G298048: VLA detection of the radio counterpart at 6 GHz DATE: 17/09/27 19:03:46 GMT FROM: Kate Alexander at Harvard U K. D. Alexander (Harvard), W. Fong (Northwestern), P. K. G. Williams, E. Berger (Harvard), and R. Margutti (Northwestern) report: We report continued radio monitoring of LIGO/VIRGO G298048 with the Karl G. Jansky Very Large Array (PI: Alexander, Program 17A-231). Our most recent observations started on 2017 September 25.703 UT, or 39.2 days post-trigger (LVC et al., GCN 21509), at a mean frequency of 6 GHz. We clearly detect the radio counterpart (Hallinan et al., GCN 21929) at ~5-sigma significance at a brightness comparable to the limit of our previous VLA observations. Further observations are planned. We thank the VLA staff for their assistance in scheduling and executing these observations.