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Following the reported discovery of the gravitational-wave pulse GW170817/G298048 by three LIGO/Virgo antennae (Abbott et al., 2017a), the MASTER GlobalRobotic Net telescopes obtained the first image of the NGC 4993 galaxy afterthe NS+NS merging. The optical transient MASTER OTJ130948.10-232253.3/SSS17awas later found, which appears to be a kilonova resulting from a merger of twoneutron stars. In this paper we report the independent detection and photometryof the kilonova made in white light and in B, V, and R filters. We note thatluminosity of the discovered kilonova NGC 4993 is very close to anotherpossible kilonova proposed early GRB 130603 and GRB 080503.

MASTER optical detection of the first LIGO/Virgo neutron stars merging GW170817