[vsnet-alert 7582] RX And has possibly entered a low state

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

RX And has possibly entered a low state

Dear Colleagues,

   The unusual Z Cam-type dwarf nova with occasional low states, RX And,
may have entered its low (faint) state.  Since the last small outburst
around November 3-4, no brightening has been observed.  This small outburst
followed a bright outburst in late November.  The present behavior seems
to reproduce the start of the 1996 August-September event.  The 1996
August-September event was the first event which revealed the peculiarity
of RX And.  The faint state lasted until 1997 January.  [And this was one
of the most memorable events in the history of VSNET, demonstrating how
world-wide amateur-professional real-time collaboration can contribute
to science!)  There was another episode in 2000 April-August (vsnet-alert
4863).

   For further reading and description of the phenomenon, see Kato et al.
(2002) PASJ 54, 575 (preprint also accecible from the VSNET preprint
archive -- click [2002] at the VSNET top page).  Papers dealing with the
same phenomena, from different points of view, can be found in Schreiber
et al. (2002) A&A 384, L6 and Sion et al. (2001) ApJ 555, 834.

  YYYYMMDD(UT)   mag  observer
  20021107.853   145  (Gary Poyner)
  20021107.863   146: (G. Koralewski)
  20021107.897   141  (Eddy Muyllaert)
  20021108.000   146  (Adolfo Darriba Martinez)
  20021108.192   146  (Mike Simonsen)
  20021109.692  <144  (Hiroshi Itoh)
  20021109.872   146  (Eddy Muyllaert)
  20021109.890   142  (Erwin van Ballegoij)
  20021110.834   147  (Jose Ripero)
  20021110.910   147  (Gary Poyner)
  20021110.962  <138  (Hazel McGee)
  20021111.003   147  (Pavol A. Dubovsky)
  20021111.710   145  (Timo Kinnunen)
  20021111.775  <139  (Eddy Muyllaert)
  20021111.839   148  (Michel Verdenet)
  20021112.926   144  (Eddy Muyllaert)
  20021114.853  <139  (Eddy Muyllaert)
  20021115.814  <133  (Eddy Muyllaert)
  20021116.550  <123  (Masashi Nakatani)
  20021116.785  <133  (Jose Ripero)

Regards,
Taichi Kato
VSNET Collaboration team

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