Observations of the first electromagnetic counterpart to a gravitational wave source by the TOROS collaboration Academic Article uri icon


  • AbstractWe present the results of prompt optical follow-up of the electromagnetic counterpart of GW170817 by the Transient Optical Robotic Observatory of the South Collaboration (TOROS). We detected highly significant dimming in the light curves of the counterpart 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.

published proceedings

  • Proceedings of the International Astronomical Union

author list (cited authors)

  • Macri, L. M., Daz, M. C., & Lambas, D. G.

citation count

  • 2

complete list of authors

  • Macri, Lucas M||Díaz, Mario C||Lambas, Diego Garcia

publication date

  • October 2017