[vsnet-j 2462] BC UMa rare outburst!

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

BC UMa rare outburst!

  BC UMa の増光です。現在12等台。短時間積分(10-30s)で変動が受かると思います。
　抜群の時期にアウトバーストしました。superoutburst に進展することを期待しま
　しょう！　南天が XZ Eri, 中天? が GZ Cnc + PV Per, 北天が BC UMa と大忙し
　です。

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                Rare Outburst of BC Ursae Majoris
   ********************************************************************

   BC UMa is located at 11h 52m 15s.88, +49o 14' 42".0 (J2000.0).
Emergent time-series CCD observations (take as many frames as possible,
covering for several hours; recommended exposure times around 10-30s;
ensure that the object and comparison stars are not saturated on the
CCD images).  Join observing this rare event!

   ===

BC UMa rare outburst!

Dear Colleagues,

   Patrick Schmeer just reported an outburst of the rarely outbursting
SU UMa-type dwarf nova BC UMa!!

Subject: [vsnet-outburst 5162] BC UMa in outburst

UMABC 20030201.205 127 Scp

   The last outburst was in 2001 June (Simonsen, short outburst).  The
preceding outburst (superoutburst and a rebrightening) in 2000 March-April
(detected during the rising stage by Schmeer).  There had long been no
confirmed outburst before the year 2000.

   see

   http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Summary/bcuma.html

   for the 2000 superoutburst.

   Further time-resolved CCD photometry is very strongly encouraged!
During the 2000 superoutburst, "early superhumps" was possibly observed
(see vsnet-alert 4562, 4567, 4577).  Urgent observations are most
strongly needed!

Regards,
Taichi Kato
VSNET Collaboration team

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