Optical Observations of the High Mass X-ray Binary MAXI J0709$-$159/LY CMa

Megumi Shidatsu, Nobuyuki Kawai, Hiroyuki Maehara +12

We report on the optical spectroscopic monitoring of the X-ray transient MAXI J0709$-$159 (identified as the Be star LY CMa) performed for about 1.5 months after the X-ray detectio…