Lipunov, V. M.; Gorbovskoy, E.; Kornilov, V. G.; . Tyurina, N.; Balanutsa, P.; Kuznetsov, A.; Vlasenko, D.; Kuvshinov, D.; Gorbunov, I.; Buckley, D. A. H.; Krylov, A. V.; Podesta, R.; Lopez, C.; Podesta, F.; Levato, H.; Saffe, C.; Mallamachi, C.; Potter, S.; Budnev, N. M.; Gress, O.; Ishmuhametova, Yu.; Vladimirov, V.; Zimnukhov, D.; Yurkov, V.; Sergienko, Yu.; Gabovich, A.; Rebolo, R.; Serra-Ricart, M.; Israelian, G.; Chazov, V.; Wang, Xiaofeng; Tlatov, A.; Panchenko, M. I.
The Astrophysical Journal Letters, Volume 850, Issue 1, article id. L1, 9 pp. (2017).
Following the discovery of the gravitational-wave source GW170817 by
three Laser Interferometer Gravitational-wave Observatory (LIGO)/Virgo
antennae (Abbott et al., 2017a), the MASTER Global Robotic Net
telescopes obtained the first image of the NGC 4993 host galaxy. An
optical transient, MASTER OTJ130948.10-232253.3/SSS17a was later found,
which appears to be a kilonova resulting from the merger of two neutron
stars (NSs). Here we describe this independent detection and photometry
of the kilonova made in white light, and in B, V, and R filters. We note
that the luminosity of this kilonova in NGC 4993 is very close to those
measured for other kilonovae possibly associated with gamma-ray burst
(GRB) 130603 and GRB 080503.
Observational Tests of the Processes of Nucleosynthesis in the Universe
Several spectroscopic analyses of stars with planets have recently been carried out. One of the most remarkable results is that planet-harbouring stars are on average more metal-rich than solar-type disc stars. Two main explanations have been suggested to link this metallicity excess with the presence of planets. The first of these, the “self