Search

Your search keyword '"Sánchez, Bruno"' showing total 2 results
Start Over Author "Sánchez, Bruno" Topic astrophysics - high energy astrophysical phenomena

Refine your results

2 results on '"Sánchez, Bruno"'

1. TOROS Optical follow-up of the Advanced LIGO-VIRGO O2 second observational campaign

Author

Artola, Rodolfo, Beroiz, Martin, Cabral, Juan, Camuccio, Richard, Castillo, Moises, Chavushyan, Vahram, Colazo, Carlos, Larenas, Hector Cuevas, DePoy, Darren L., Díaz, Mario C., Domínguez, Mariano, Dultzin, Deborah, Fernández, Daniela, Ferreyra, Antonio C., Fonrouge, Aldo, Franco, José, Graña, Darío, Girardini, Carla, Gurovich, Sebastián, Kanaan, Antonio, Lambas, Diego G., Lares, Marcelo, Hinojosa, Alejandro F., Hinojosa, Andrea, Hinojosa, Americo F., López-Cruz, Omar, Macri, Lucas M., Marshall, Jennifer L., Melia, Raul, Mendoza, Wendy, Castellón, José L. Nilo, Padilla, Nelson, Perez, Victor, Peñuela, Tania, Rattray, Wahltyn, Renzi, Víctor, Ríos-López, Emmanuel, Rivera, Amelia Ramírez, Ribeiro, Tiago, Rodriguez, Horacio, Sánchez, Bruno, Schneiter, Matías, Schoenell, William, Starck, Manuel, Vrech, Rubén, Quiñones, Cecilia, Tapia, Luis, Tornatore, Marina, Torres-Flores, Sergio, Vilchis, Ervin, and Zadrożny, Adam

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for 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
2019
Full Text
View/download PDF

2. GW150914: First search for the electromagnetic counterpart of a gravitational-wave event by the TOROS collaboration

Author

Díaz, Mario C., Beroiz, Martín, Peñuela, Tania, Macri, Lucas M., Oelkers, Ryan J., Yuan, Wenlong, Lambas, Diego García, Cabral, Juan, Colazo, Carlos, Domínguez, Mariano, Sánchez, Bruno, Gurovich, Sebastián, Lares, Marcelo, Schneiter, Matías, Graña, Darío, Renzi, Victor, Rodriguez, Horacio, Starck, Manuel, Vrech, Rubén, Artola, Rodolfo, Ferreyra, Antonio Chiavassa, Girardini, Carla, Quiñones, Cecilia, Tapia, Luis, Tornatore, Marina, Marshall, Jennifer L., DePoy, Darren L., Branchesi, Marica, Brocato, Enzo, Padilla, Nelson, Pereyra, Nicolás A., Mukherjee, Soma, Benacquista, Matthew, and Key, Joey

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We present the results of the optical follow-up conducted by the TOROS collaboration of the first gravitational-wave event GW150914. We conducted unfiltered CCD observations (0.35-1 micron) with the 1.5-m telescope at Bosque Alegre starting ~2.5 days after the alarm. Given our limited field of view (~100 square arcmin), we targeted 14 nearby galaxies that were observable from the site and were located within the area of higher localization probability. We analyzed the observations using two independent implementations of difference-imaging algorithms, followed by a Random-Forest-based algorithm to discriminate between real and bogus transients. We did not find any bona fide transient event in the surveyed area down to a 5-sigma limiting magnitude of r=21.7 mag (AB). Our result is consistent with the LIGO detection of a binary black hole merger, for which no electromagnetic counterparts are expected, and with the expected rates of other astrophysical transients., Comment: ApJ Letters, in press

Published
2016
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results