Observations
of the January 2005 outburst of BZ UMa
Patrick
Schmeer reported an outburst detection of this
interesting cataclysimic variable on Jan 16th, 2005
(see announcement below). Following
last
year's observations of BZ UMa at CBA Belgium
Observatory, as part of an observing campaign
organised by the AAVSO, I immediately decided to
start a photometric session on this cataclysmic
variable.
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Unfiltered
CCD observations by P. Schmeer, Bischmisheim,
Germany:
UMABZ 20050115.362 160CR Scp
UMABZ 20050116.359 142CR Scp
Instrument: University of Iowa, Rigel Telescope
(0.37-m Cassegrain)
Sequence: Henden and Sumner (R magnitudes
derived from V and B-V) |
|
|
|
Patrick
Schmeer's outburst detection announcement on
CVnet |
|
2005, Jan 16/17
Observations
at CBA Belgium Observatory started at 18h01m UT on
Jan 16, 2005. I used a 0.35-m f/6.3 telescope with
ST-7XME CCD camera and V-filter. Sky conditions were
pretty good initially (despite moonlight), but
around 20h08m UT, thick clouds prevented me from
further observing. The initial stage of a BZ UMa
outburst is not yet well studied, so the present
observations might still be of interest, despite the
short duration of the session.
The
resulting light curve is shown below. It depicts a
steady increase in BZ UMa's magnitude (rising from
mag 11.31 to mag 11.20 in 2 hours), but no further
obvious modulations are seen.
I hope
to continue observing BZ UMa over the next nights.
Most BZ UMa outbursts are rather short lived (~5
days).
BZ UMa lightcurve dd 2005, Jan
16/17. V-filter exposures. CBA Belgium Observatory.
