Optical spectroscopic monitoring of the symbiotic star MWC 560 before and after the 2018 unpredicted brightening
Kazuko ANDO,Naoya FUKUDA,Hidehiko AKAZAWA, Bunei SATO, Ryo HASEGAWA, Yohei KOIZUMI, Masashi OMIYA, Hiroki HARAKAWA, Eiji KAMBE, Hiroyuki MAEHARA , and Hideyuki IZUMIURA
Publications of the Astronomical Society of Japan