GCN Circular 18734

A.Grado (INAF-OAC), G.Greco (Urbino University/INFN Firenze), E. Brocato (INAF-OAR), M. Branchesi (Urbino University/INFN Firenze), E. Cappellaro (INAF-OAPd),  L.Amati (INAF-IASF Bo), L. A. Antonelli, (INAF-OAR), P. Astone (INFN-Roma), S. Campana, S. Covino, P. D'Avanzo (INAF-OAB),  V. D'Elia (INAF-ASDC), F. Getman (INAF-OAC), G. Giuffrida (INAF-ASDC), L. Limatola (INAF-OAC), M. Lisi (INAF-OAR), S. Marinoni, P. Marrese (INAF-ASDC), A. Melandri (INAF-OAB), L. Nicastro, E. Palazzi (INAF-IAFS Bo), E. Pian (SNS-Pisa), S. Piranomonte, L. Pulone (INAF-OAR), F. Ricci (Sapienza University), G. Stratta (Urbino University/INFN Firenze), G. Tagliaferri (INAF-OAB), V. Testa (INAF-OAR), L. Tomasella (INAF-OAPd) on behalf of the INAF Gravitational Astronomy group report: 

We observed 72 square degree of the skymap of the advanced LIGO and Virgo trigger G211117, with the VLT Survey Telescope (VST) at ESO-Paranal equipped with OMEGACAM (FOV=1 square degree). The r SDSS filter was used. 
The observations are divided in 8 regions 3 x 3 square degree each, centered on the following coordinates RA, Dec (J2000):

North
02:29:55.200 +16:13:12.00
02:38:02.208 +19:13:12.00
02:46:35.712 +22:12:33.84
02:59:40.800 +25:13:12.00
03:06:55.128 +28:13:12.00
03:18:23.712 +31:13:12.00
South
13:45:53.208 -26:48:00.00
13:39:47.208 -23:48:00.00

The first group of observations on the North area started at 2015-12-28T01:14:02.794 UT and finished at 2015-12-28T04:00:48.959 UT, while the observations in the South area started at 2015-12-28T07:51:18.143 UT and finished at 2015-12-28T08:55:27.653 UT. 
The image analysis is ongoing. Further observations of these fields are planned.