GW150914: First Search for the Electromagnetic Counterpart of a Gravitational-wave Event by the TOROS Collaboration

Autor: Horacio Rodriguez, Marina Tornatore, Marica Branchesi, Ryan J. Oelkers, Nicolas A. Pereyra, Nelson Padilla, C. Quiñones, C. Girardini, Joey Shapiro Key, Martin Beroiz, Mario C. Díaz, Darío Graña, T. Peñuela, Juan B. Cabral, M. Schneiter, Manuel Starck, Lucas M. Macri, R. Vrech, Marcelo Lares, Mariano Dominguez, Darren L. DePoy, Rodolfo Artola, Jennifer L. Marshall, Sebastián Gurovich, Enzo Brocato, Soma Mukherjee, Wenlong Yuan, Diego G. Lambas, C. Colazo, Matthew Benacquista, Antonio Chiavassa Ferreyra, Luis Tapia, V. Renzi, Bruno Sanchez
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Ciencias Físicas
FOS: Physical sciences
Field of view
Astrophysics
OPTICAL
01 natural sciences
law.invention
Telescope
purl.org/becyt/ford/1 [https]
OBSERVATIONS
Binary black hole
law
0103 physical sciences
Instrumentation and Methods for Astrophysics (astro-ph.IM)
010303 astronomy & astrophysics
Óptica
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics
010308 nuclear & particles physics
Gravitational wave
Astronomy and Astrophysics
Observable
purl.org/becyt/ford/1.3 [https]
ELECTROMAGNETIC
LIGO
Galaxy
Space and Planetary Science
Limiting magnitude
GRAVITATIONAL
Astrophysics - High Energy Astrophysical Phenomena
Astrophysics - Instrumentation and Methods for Astrophysics
CIENCIAS NATURALES Y EXACTAS
Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Popis: 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.
ApJ Letters, in press
Databáze: OpenAIRE
Externí odkaz: