Electronic Telegram No. 922
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html


GW LIBRAE
     M. Templeton, AAVSO, reports that R. Stubbings (Drouin, Victoria,
Australia) has found the cataclysmic variable GW Lib to be in outburst,
and it has been very rapidly brightening (as indicated by the magnitude
estimates below).  E. O. Waagen, AAVSO, adds that there are no known
observations of any outburst of GW Lib since its discovery on 1983 Aug. 10
(cf. IAUC 3854).  Visual magnitude estimates for this apparent WZ Sge-type
variable, mostly submitted by Waagen:  Apr. 11.127 UT, [12.0 (P. Schmeer,
Bischmisheim, Germany); 12.126, [12.0 (Schmeer); 12.494, 13.8 (Stubbings);
12.542, 13.7 (Stubbings); 12.566, 13.4 (Stubbings); 12.569, 14.0 (A.
Pearce, Nedlands, W. Australia); 12.578, 13.0 (Stubbings); 12.595, 12.9
(Stubbings); 12.607, 12.4 (Stubbings); 12.617, 13.2 (Pearce); 12.619, 12.3
(Stubbings); 12.628, 12.1 (Stubbings); 12.646, 12.0 (Stubbings); 12.659,
11.8 (Stubbings); 12.853, 9.9 (Pearce).  CCD V magnitudes reported to the
AAVSO by P. Nelson, Ellinbank, Victoria, Australia:  Apr. 12.5972, 13.03;
12.6333, 12.30; 12.6694, 11.86.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2007 CBAT
2007 April 13                    (CBET 922)               Daniel W. E. Green