TOROS optical follow-up of the advanced LIGO-VIRGO O2 second observational campaign

BEROIZ, MARTIN; CASTILLO, MOISES; CUEVAS, HECTOR; DOMÍNGUEZ, MARIANO; ARTOLA, RODOLFO; CAMUCCIO, RICHARD; COLAZO, CARLOS; DÍAZ, MARIO C; CABRAL, JUAN; CHAVUSHYAN, VAHRAM; DEPOY, DARREN L

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

WILEY-BLACKWELL PUBLISHING, INC

Año: 2020 vol. 493 p. 2207 - 2214

0035-8711

We present the methods and results of the optical follow-up, conducted by the TOROS collaboration, of gravitational wave events detected during the Advanced LIGO-Virgo second observing run (Nov 2016 ? Aug 2017). Given the limited field of view (∼100′) of our observational instrumentation, we targeted galaxies within the area of high localization probability that were observable from our sites. We analyzed the observations using difference imaging, followed by a Random Forest algorithm to discriminate between real and spurious transients. Our observations were conducted using telescopes at Estación Astrofísica de Bosque Alegre, Cerro Tololo Inter-American Observatory, the Dr. Cristina V. Torres Memorial Astronomical Observatory and an observing station in Salta, Argentina.