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 |
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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 |
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