[vsnet-chat 7965] 2MASS J18312958+0851090: detached sdO + secondary

[Taichi Kato]

2MASS J18312958+0851090: detached sdO + secondary

   ASAS-SN data:

https://asas-sn-s.asc.ohio-state.edu/light_curves/f8d789bb-1945-46cd-88b1-99cee295fb55

   I found a period of 0.460056(3) d.
Range 14.5-14.8 (sinusoidal variation).

   The object is an sdO star (GALEX J183129.61+085107.70)
and the variation is from the heated secondary
without eclipses.

GALEX:
NUV=14.150(0.009) FUV=13.259(0.009)