[vsnet-alert 6] superoutburst overdue: PG 0943+521

[tkato@kusastro.kyoto-u.ac.jp]

   Dear Colleagues,

   The peculiar SU UMa-type dwarf nova, notable for its ultra-short
supercycle (43 days) and most stable (<1-2 day) outburst periodicity,
seems to be jittering before entering a new superoutburst, after 47 days
since last (1994 Dec. 9) superoutburst.  The fact is clearly aginst the
idea of "stable clock" sometimes assumed in superoutburst physics.
Recent observations from vsnet-obs:

   Jan. 23.989   14.8  G. Poyner
        24.8     13.1  L. Szentasko

   Observations at this phase would be valuable in revealing the
precise outburst mechanism of this "laboratory of outburst" dwarf nova.

Regards,
Taichi Kato

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