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[vsnet-campaign 519] IY UMa likely superoutburst?
IY UMa likely superoutburst?
If the current outburst of IY UMa is a genuine superoutburst (as inferred
from possible superhump detections and recent visual estimates), the
supercycle would becomd around 270 days. This may suggest two superoutbursts
may have been missed between Takamiazawa's dicovery and the 2000 January
one. It may have been the second missed one just fell in the seasonal
gap of monitoring.
Observations of the present outburst and a search for archival plates
are very encouraged!
In making CCD photometry, please make exposure times as short as
reasonably achiebable. The 30s exposure would be adequate for small
(20-30 cm) telescopes. Longer exposures will smear out the eclipse
details, which need to be avoided.
Regards,
Taichi Kato
VSNET Collaboration team
vsnet-adm@kusastro.kyoto-u.ac.jp
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