TITLE: GCN CIRCULAR NUMBER: 18353 SUBJECT: LIGO/Virgo G184098: transient search with VISTA DATE: 15/09/21 18:50:17 GMT FROM: Nial Tanvir at U of Leicester N. R. Tanvir (U. Leicester), A. J. Levan, D. White (U. Warwick), P. T. O'Brien, K. Wiersema (U. Leicester) report on behalf of a larger collaboration: We have initiated a sequence of observations with the 4m ESO VISTA telescope at Cerro Paranal, Chile, to map most of the region between 4h40m and 6h30m in RA and -65 degs to -73 degs in dec (total area ~60 sq deg). We are observing in the Y, J and K bands (30 s integrations in each), and the observations are expected to take 5 or 6 nights, depending on weather, beginning on 20th Sept.