[IAUC] CBET 1053: 20070905 : HS 2331+3905

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                                                  Electronic Telegram No. 1053
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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HS 2331+3905
     M. Templeton and E. O. Waagen, AAVSO, have informed us of apparently
the first known outburst of the cataclysmic variable HS 2331+3905 (R.A. =
23h34m01s.55, Decl. = +39o21'42".9, equinox 2000.0; position from AAVSO
Alert Notice 357, apparently originally from the USNO B1.0 catalogue).  The
variable was discovered in the course of the Hamburg Quasar Survey [see
Araujo-Betancor et al. 2004, Proc. IAU Colloq. 194, in Revista Mex. Astron.
Astrofis. (Serie de Conferencia) 20, 190; Araujo-Betancor et al. 2005, A.Ap.
430, 629].  Templeton notes that the variable is near V mag 16.4 at
quiescence.  Selected AAVSO CCD magnitudes (unfiltered unless otherwise
noted):  Sept. 3.192 UT, 16.2 (G. Poyner, Birmingham, England); 3.194, V =
16.3 (F. Gobet, Cestas, France); 4.924, V = 12.26 (D. Rodriguez, Madrid,
Spain); 4.924, V = 12.21 (Rodriguez); 4.924, V = 12.21 (Rodriguez); 4.927,
V = 12.19 (Rodriguez); 4.928, V = 12.16 (Rodriguez); 4.929, V = 12.19
(Rodriguez); 4.930, V = 12.14 (Rodriguez); 4.973, V = 11.53 (C. Gualdoni,
Como, Italy); 5.096, V = 10.87 (R. Koff, Bennett, CO, U.S.A.); 5.150, V =
10.53 (G. Waddill, Richmond, VA, U.S.A.); 5.164, V = 10.41 (M. Nicholson,
Daventry, England); 5.165, B = 10.49 (Nicholson); 5.243, V = 10.06
(Nicholson); 5.269, V = 10.02 (R. Huziak, Saskatoon, SK, Canada); 5.350, V
= 9.70 (Huziak); 5.352, V = 9.60 (Nicholson); 5.400, V = 9.34 (Nicholson);
5.417, B = 9.30 (Nicholson); 5.430, V = 9.10 (Nicholson); 5.460, V = 9.05
(Nicholson); 5.472, V = 9.15 (Nicholson); 5.473, B = 9.10 (Nicholson);
5.483, V = 8.97 (Huziak).  Visual magnitude estimates, in part from Waagen:
Sept. 3.87, [14.2 (P. Schmeer, Bischmisheim, Germany); 3.893, [14.6 (E.
Muyllaert, Oostende, Belgium); 4.843, 13.9 (Muyllaert); 4.868, 12.8
(Schmeer); 4.894, 12.6 (Schmeer); 4.961, 12.0 (Schmeer); 5.082, 10.8 (M.
Komorous, London, Ontario, Canada); 5.099, 10.4 (J. Bortle, Stormville, NY,
U.S.A.); 5.121, 10.6 (Schmeer); 5.148, 10.5 (Schmeer); 5.194, 10.2
(Komorous); 5.274, 9.6 (Komorous); 5.310, 9.6 (Komorous); 5.333, 9.8
(Komorous); 5.360, 9.5 (Komorous).


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                         (C) Copyright 2007 CBAT
2007 September 5                 (CBET 1053)              Daniel W. E. Green