[IAUC] CBET 1582: 20081125 : V358 LYRAE

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                                                  Electronic Telegram No. 1582
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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V358 LYRAE
     A. Henden, AAVSO, reports that this variable has been found to be in
outburst at mag 16.1 by J. Shears (Bunbury, U.K.) and G. Poyner (Birmingham,
U.K.) from a Bradford Robotic Telescope unfiltered image taken on Nov. 22.917
UT; the position for V358 Lyr was measured to be R.A. = 18h59m32s.99, Decl. =
+42o24'12".0 (equinox 2000.0).  A confirming unfiltered image taken by S.
Dvorak (Clermont, FL, U.S.A.) on Nov. 22.98 yields mag 16.1 and position end
figures 32s.97, 11".7.  T. Krajci (Cloudcroft, NM, U.S.A.) reports V = 15.92
+/- 0.03 on Nov. 23.082 (average of 29 V-band images, with no obvious
brightening or fading over the interval; color blue, as expected for a
cataclysmic-variable outburst; position end figures 32s.96, 12".0).  This is a
likely WZ Sge-type variable.  The only known outburst was in 1965, as reported
by Hoffmeister (1967, A.N. 289, 205).  At that time, two photographic plates
gave magnitudes of 16.42 and 17.31.  Antipin et al. (2004, IBVS 5544) looked
at the original plate material and revised Hoffmeister's coordinates with
measured end figures 32s.95, 12".3; Antipin et al. checked 30 years of Moscow
photographic plates and found no other outburst.  Henden gives limiting V
magnitudes from USNO/Flagstaff observations:  2004 Sept. 3, [22.2; Oct. 15,
[22.5.  This gives a minimum outburst amplitude of 6.6 magnitudes.


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                         (C) Copyright 2008 CBAT
2008 November 25                 (CBET 1582)              Daniel W. E. Green