Search for the optical counterpart of the GW170814 gravitational wave event with the VLT Survey Telescope

  title={Search for the optical counterpart of the GW170814 gravitational wave event with the VLT Survey Telescope},
  author={Aniello Grado and Enrico Cappellaro and Stefano Covino and Fedor I. Getman and Giuseppe Greco and Luca Limatola and S. Yang and Lorenzo Amati and Stefano Benetti and Marica Branchesi and Enzo Brocato and Maria Teresa Botticella and Sergio Campana and Michele Cantiello and Mauro Dadina and Filippo D’Ammando and Giovanni de Cesare and Valerio D’Elia and Massimo Della Valle and Enrichetta Iodice and Giuseppe Longo and Michela Mapelli and Nicola Masetti and Luciano Nicastro and Eliana Palazzi and Andrea Possenti and Mario Radovich and Andrea Rossi and Ruben Salvaterra and Luigi Stella and Giulia Stratta and Vincenzo Testa and Lina Tomasella},
  journal={Monthly Notices of the Royal Astronomical Society},
We report on the search for the optical counterpart of the gravitational event GW170814, which was carried out with the VLT Survey Telescope (VST) by the GRAvitational Wave Inaf TeAm (GRAWITA). Observations started 17.5 hours after the LIGO/Virgo alert and we covered an area of 99 deg$^2$ that encloses $\sim 77\%$ and $\sim 59\%$ of the initial and refined localization probability regions, respectively. A total of six epochs were secured over nearly two months. The survey reached an average… 

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