1. TOROS optical follow-up of the advanced LIGO–VIRGO O2 second observational campaign
- Author
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T. Ribeiro, Richard Camuccio, C. Quiñones, José Franco, Antonio Kanaan, Americo F Hinojosa, R. Vrech, Amelia Cristina Ramirez Rivera, Omar López-Cruz, Darren L. DePoy, William Schoenell, Rodolfo Artola, Emmanuel Ríos-López, Adam Zadrożny, Manuel Starck, Horacio Rodriguez, José Luis Nilo Castellón, Marina Tornatore, Wahltyn Rattray, Diego G. Lambas, B. Sanchez, Ervin Vilchis, Darío Graña, H. Cuevas, Moises Castillo, D. Fernández, C. Girardini, Alejandro F Hinojosa, Andrea Hinojosa, S. Torres-Flores, Jennifer L. Marshall, Marcelo Lares, M. Schneiter, Antonio Chiavassa Ferreyra, Aldo Fonrouge, V. H. Chavushyan, Nelson Padilla, Deborah Dultzin, Sebastián Gurovich, Luis Tapia, V. Renzi, Wendy Mendoza, Mario C. Díaz, Victor Haber Perez, T. Penuela, M. Beroiz, Lucas M. Macri, C. Colazo, Raul Melia, Mariano Dominguez, and Juan B. Cabral
- Subjects
High Energy Astrophysical Phenomena (astro-ph.HE) ,Physics ,010308 nuclear & particles physics ,Gravitational wave ,Astrophysics::High Energy Astrophysical Phenomena ,Astrophysics::Instrumentation and Methods for Astrophysics ,FOS: Physical sciences ,Astronomy ,Astronomy and Astrophysics ,Observable ,Field of view ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Galaxy ,LIGO ,Neutron star ,Binary black hole ,Space and Planetary Science ,Observatory ,0103 physical sciences ,Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics - Instrumentation and Methods for Astrophysics ,Instrumentation and Methods for Astrophysics (astro-ph.IM) ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics - Abstract
We present the 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 ($\sim100\arcmin$) 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 bogus transients. For all three events that we respond to, except GW170817, we did not find any bona fide optical transient that was plausibly linked with the observed gravitational wave event. Our observations were conducted using telescopes at Estaci\'{o}n Astrof\'{\i}sica de Bosque Alegre, Cerro Tololo Inter-American Observatory, and the Dr. Cristina V. Torres Memorial Astronomical Observatory. Our results are consistent with the LIGO-Virgo detections of a binary black hole merger (GW170104) for which no electromagnetic counterparts were expected, as well as a binary neutron star merger (GW170817) for which an optical transient was found as expected., Comment: 9 pages, 4 figures
- Published
- 2020
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