BW Scl bright outburst

Information about outbursts of eruptive stars, Be activity, ...
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Francois Teyssier
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BW Scl bright outburst

Post by Francois Teyssier »

BW Scl is in outburst (mag 9.5)
The status of this star is not yet final
A low resolution spectrum of this star would provide important additional information
For observers of the South

François Teyssier

AAVSO Notice
Outburst of the UGWZ candidate BW Scl
October 21, 2011

The short period cataclysmic variable BW Scl appears to be in outburst.
The object was detected in outburst at m(vis)=9.6 by M. Linnolt on 2011
October 21.3146 (JD 2455855.8146), and confirmed by A. Plummer at
m(vis)=9.4 on October 21.3424. Observations of this object are
encouraged. The object has conflicting classifications in astronomical
literature, but is probably a WZ Sge-type dwarf nova rather than
a novalike variable.

BW Scl is located at the following (J2000) coordinates:

RA: 23 53 00.85 , Dec: -38 51 46.4

Both visual observations and instrumental time-series are encouraged.
If this object is a WZ Sge star, it may undergo several fadings and
rebrightenings during the course of the outburst. This object is
typically around m(V)=16.5, and there are no prior outbursts in the
AAVSO archives. Since this object is bright, we encourage the use of
filters for instrumental observations, and observers should be able
to obtain good time resolution with good signal-to-noise during early
stages of the outburst at least.
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