期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 848, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/2041-8213/aa9060
关键词
gamma-ray burst: individual (170817A); stars: neutron
资金
- NSF support through grant NSF-HRD [1242090]
- Consejo Nacional de Investigaciones Cientificas y Tecnicas of Argentina
- FAPESP [2009/54202-8]
- Observatorio Nacional-MCT
- Southern Office of Aerospace Research and Development (SOARD), a branch of the Air Force Office of the Scientific Research International Office of the United States (AFOSR/IO) [FA9550-15-1-0167]
- Direccion de Investigacion y Desarrollo de la Universidad de La Serena through the Programa de Incentivo a la Investigacion Academica (PIA-DIULS)
- Brazilian agency CNPq [PDE-200289/2017-9, universal-459553/2014-3]
- Universidad of La Serena
- Argentine Gemini TAC
- Mexican GTC TAC
- Division Of Human Resource Development
- Direct For Education and Human Resources [1242090] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1430152] Funding Source: National Science Foundation
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. 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 similar to 35 hr after the trigger with the T80- South telescope. A second epoch of observations, obtained similar to 59 hr after the event with the EABA 1.5 m 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.
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