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Special Notice #18: Rare Outburst of 0829+53 SW UMa

September 14, 2006: The SU UMa-type cataclysmic variable SW UMa is in superoutburst, according to observations reported by Patrick Schmeer, Bischmisheim, Germany, and a confirming observation reported by Stanislaw Swierczynski, Dobczyce, Poland.

Coordinates: R.A. 08:36:42.74 Decl. +53:28:38.1 (2000)

Recent observations (visual) reported to the AAVSO include:

AUG 21.8757, <13.5, D. Naillon, Lithons, France;

SEP 12.1400, <13.0, P. Schmeer, Bischmisheim, Germany;

13.1490, 10.8, Schmeer;

14.0361, 10.2, S. Swierczynski, Dobczyce, Poland.

According to observations in the AAVSO International Database, the last observed outburst of SW UMa, which was also a superoutburst, was in October 2002, when the star reached visual magnitude 10.5 and was brighter than 13.5 for 17 days. Normal minimum magnitude is approximately visual magnitude 16.8.

AAVSO charts are available at http://www.aavso.org/cgi-bin/searchcharts3.pl?name=sw%20uma   [2014 chart link http://www.aavso.org/vsp]

Visual and CCD observations are requested. CCD observers are asked to carry out time series runs (V filter) with a cadence such that each observation has at least S/N=50. If observations with more than one filter are possible, all should be made within the same S/N=50 constraint.

Please report observations to the AAVSO as 0829+53 SW UMA.

Congratulations to Patrick and to Stanislaw for their discovery and confirmation, respectively!

Good observing,

This special notice was compiled by: Elizabeth O. Waagen

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