[vsnet-alert 11572] Re: BC UMa: rapid decline

[Taichi Kato]

   Arto Oksanen also reported the start of the rapid fading:

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I got a short run (2 hrs) of BC UMa at Hankasalmi. The star was still bright at
V=15.0 and showed similar superhumps (0.1 mag min-max) than the night before.
There seem to be fading trend that might indicate that the star has entered into
the fast decline phase. Weather was good until the very end of the run.

http://murtoinen.dyndns.org:8888/ccd/BCUMa/BCUMa_20091014V.png
http://murtoinen.dyndns.org:8888/ccd/BCUMa/BCUMa.png

Comp star: 129 from the AAVSO sequence (V=12.923)

Equipment: 40 cm RC telescope, SBIG STL1001E CCD with V-filter

Observer: A. Oksanen

arto

--
Arto Oksanen
arto.oksanen at jklsirius.fi
Muurame, Finland