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20 April 2024

» arxiv » 1710.5844

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Observations of the first electromagnetic counterpart to a gravitational wave source by the TOROS collaboration
M.C. Díaz ; L.M. Macri ; D. Garcia Lambas ; C. Mendes de Oliveira ; J.L. Nilo Castellón ; T. Ribeiro ; B. Sánchez ; W. Schoenell ; L.R. Abramo ; S. Akras ; J.S. Alcaniz ; R. Artola ; M. Beroiz ; S. Bonoli ; J. Cabral ; R. Camuccio ; M. Castillo ; V. Chavushyan ; P. Coelho ; C. Colazo ; M.V. Costa-Duarte ; H. Cuevas Larenas ; D.L. DePoy ; M. Domínguez Romero ; D. Dultzin ; D. Fernández ; J. García ; C. Girardini ; D.R. Gonçalves ; T.S. Gonçalves ; S. Gurovich ; Y. Jiménez-Teja ; A. Kanaan ; M. Lares ; R. Lopes de Oliveira ; O. López-Cruz ; J.L. Marshall ; R. Melia ; A. Molino ; N. Padilla ; T. Peñuela ; V.M. Placco ; C. Quiñones ; A. Ramírez Rivera ; V. Renzi ; L. Riguccini ; E. Ríos-López ; H. Rodriguez ; L. Sampedro ; M. Schneiter ; L. Sodré ; M. Starck ; S. Torres-Flores ; M. Tornatore ; A. Zadrożny ;
Date:	16 Oct 2017
Abstract:	We present the results of prompt optical follow-up of the electromagnetic counterpart of the gravitational-wave event GW170817 by the Transient Optical Robotic Observatory of the South Collaboration (TOROS). We detected highly significant dimming in the light curves of the counterpart (Delta g=0.17+-0.03 mag, Delta r=0.14+-0.02 mag, Delta i=0.10 +- 0.03 mag) over the course of only 80 minutes of observations obtained ~35 hr after the trigger with the T80-South telescope. A second epoch of observations, obtained ~59 hr after the event with the EABA 1.5m telescope, confirms the fast fading nature of the transient. The observed colors of the counterpart suggest that this event was a "blue kilonova" relatively free of lanthanides.
Source:	arXiv, 1710.5844
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