[vsnet-alert 6518] V844 Her (relatively rare) outburst!

[Taichi Kato <tkato>]

V844 Her (relatively rare) outburst!

   The SU UMa-type dwarf nova V844 Her (with a short orbital period) is
undergoing a relatively rare outburst.   The last outburst occurred
in 2000 July (superoutburst).  The most unusual characters of this dwarf
nova is the apparent absence of normal outburst, while the intervals of
superoutbursts are not especially long.  Since the superhump period
(0.05592 d, IBVS 4902) makes V844 Her a member of "ultrashort" period
family (to which WZ Sge also belong), early observations to check the
possible presence of early superhumps, and to follow the evolution of
superhumps, are encouraged.  The present outburst is young enough, and
the chance to accomplish the job is high.  If you have three telescopes
and CCDs ;-), observe WZ Sge, V844 Her and HO Del simultaneously...

  YYYYMMDD(UT)   mag  observer
  20010825.858  <141  (E. Muyllaert)
  20010825.863  <136  (H. McGee)
  20010825.883  <152  (M. Reszelski)
  20010826.142  <135  (R. J. Modic)
  20010826.883  <153  (G. Poyner)
  20010826.883  <162  (M. Reszelski)
  20010827.094  <141  (M. Simonsen)
  20010827.848  <141  (C. P. Jones)
  20010827.860  <141  (E. Muyllaert)
  20010827.882  <141  (H. McGee)
  20010827.897  <153  (G. Poyner)
  20010827.931  <165  (M. Reszelski)
  20010828.128  <141  (R. J. Modic)
  20010828.856  <141  (C. P. Jones)
  20010828.941  <141  (E. Muyllaert)
  20010829.142  <149  (R. J. Modic)
  20010829.168  <141  (M. Simonsen)
  20010829.835  <141  (E. Muyllaert)
  20010829.942  <155  (M. Reszelski)
  20010829.992  <141  (M. Simonsen)
  20010830.149  <145  (R. J. Modic)
  20010831.846   138  (C. P. Jones)
  20010831.853   138  (C. P. Jones)
  20010831.901   134  (C. P. Jones)
  20010831.944   128  (C. P. Jones)

Regards,
Taichi Kato
VSNET Collaboration team

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