XX Ophiuchi in Deep Minimum after 37 Years
Bibcode: 2004IBVS.5571....1S
Sobotka, P.
Abstract
XX Ophiuchi is a unique object, which is very difficult to classify. This star only slowly varied around the maximum magnitude (V approx 9 mag) during the past 37 years. In March 2004, the brightness started to fade by 0.2 mag per month. I stress the urgent need of the spectroscopic observations during this minimum.
2004
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Information Bulletin on Variable Stars
INTEGRAL
3