Optical spectroscopic monitoring of the symbiotic star MWC 560 before and after the 2018 unpredicted brightening
Ando, K., Fukuda, N., Akazawa, H., Sato, B., Hasegawa, R., Koizumi, Y., Omiya, M., Harakawa, H., Kambe, E., Maehara, H., Izumiura, H.
Publications of the Astronomical Society of Japan