DI UMa : Returned to the state of "supershort supercycle"
M. Reszelski reported an outburst (15.7: mag) of DI UMa on
February 18. The outburst was probably a superoutburst
(vsnet-campaign-dn 524).
The outburst observations by M. Reszelski in 2001 indicate that
detectable outbursts of DI UMa comes every 24-31 days. If the detected
outbursts are superoutbursts, this observed interval is pretty close to
the 22-d value
(vsnet-alert 374).
The system may have returned to the state originally qualified DI UMa
as the "most extremely RZ LMi-like object", the extreme end of ER UMa
stars
(vsnet-campaign 858).
G. Poyner reported a new outburst at 15.0 mag on April 20
(vsnet-campaign-dn 685).
The light curve on April 22 taken by the Kyoto team showed no clear
superhumps but some modulations with an amplitude of 0.15mag
(vsnet-campaign-dn 690).
The outburst finished in the end of April, and it experienced a
re-brightening to 15.6mag on May 12, which rapidly faded without clear
periodic modulation
(vsnet-campaign-dn 769,
770).
The next outburst of 15.5mag was reported by M. Reszelski on May 19
(vsnet-campaign-dn 799).
The object returned to quiescence around May 26
(vsnet-campaign-dn 830).
On October 23, T. Kinnunen reported another outburst reaching
15.4mag.
(vsnet-campaign-dn 1776).
Other related articles:
vsnet-campaign-dn 687,
692,
700,
708,
724,
vsnet-campaign 871,
872,