TITLE: GCN CIRCULAR NUMBER: 25222 SUBJECT: LIGO/Virgo S190728q: GRAWITA VST-ESO PARANAL observations DATE: 19/07/30 14:05:35 GMT FROM: Aniello Grado at INAF-OAC AUTHORS: A. Grado (INAF-Napoli), E. Cappellaro (INAF-Padova), F. Getman (INAF-Napoli), S. Yang (INAF-Padova), E. Brocato (INAF-Abruzzo), P. D’Avanzo (INAF-BRERA), S. Covino (INAF-Brera), G. Greco (Universita' Urbino) on behalf of GRAWITA. We observed 45 sqdeg in two epochs covering the field of S170728q (LIGO/Virgo, S. Antier, GCN #25208) in r' band with the VLT Survey Telescope (VST) equipped with Omegacam (1 sqdeg FOV) (Proposal ID ESO 0103.D-0070 ). Observations of the first epoch started on 2019-07-29 at 03:14 UT and ended at 06:52. Observations of the second epoch started on 2019-07-30 at 03:01 end ended at 06:56 UT. The observations, covering 65% of the localization probability region, were organized in group of 3x3 deg, the coordinates of the center of each group are: RA(J2000) Dec(J2000) ------------------------ 319.55602 18.0797 317.09440 15.01752 315.45366 12.04954 313.95922 8.53513 313.16805 5.85237 Each 1 sqdeg pointing was observed three times for a total exposure time of 135 seconds.The average 50% completeness for point sources is 22.4 mag. Analysis of the images is in progress. We acknowledge excellent support from the ESO User Support Department and from ESO observing staff in Paranal.