CR Boo: Long, Bright State
A bright outburst of CR Boo was reported at 13.2mag on January 11 by H.
Itoh (vsnet-campaign-dn
2041). The outburst was confirmed at 13.6mag on January 12 by M.
Simonsen (vsnet-campaign-dn
2043).
The next outburst of 13.3mag was reported by M. Simonsen on January 25
(vsnet-campaign-dn
2074).
The outburst since February 18 was reported to have a relatively long duration,
indicating a superoutburst (vsnet-campaign-dn
2139, 2141).
M. Uemura reported a new outburst of CR Boo on March 8 (vsnet-campaign-dn
2161). He also detected superhumps, which provided evidence for the
superoutburst nature of the current outburst. The last outburst had occurred
two weeks ago (vsnet-campaign-dn
2174). The outburst faded around March 13 (vsnet-campaign-dn
2171, 2188).
A new outburst was reported by M. Simonsen on March 22 (vsnet-campaign-dn
2207). The Kyoto team reported that the object had remained at 13.6mag
without fading since March 21. Such a state without fading is rather
atypical for superoutbursts and is difficult to be explained with the
disk-instability model for dwarf nova outbursts (vsnet-campaign-dn
2215). The object began fading on March 30. The atypical plateau
lasted for, at least 7 days (vsnet-campaign-dn
2223).
An outburst at 13.8mag was reported on April 12 by M. Simonsen (vsnet-campaign-dn
2294). Subsequent reported observations implied that the object then
entered in a relatively bright state of ~14mag (vsnet-campaign-dn
2329, 2401,
2412,
2421,
2523,
2570,
2594,
2621).
Some brightenings were observed: about 13.8mag during May 3 and 4 (vsnet-campaign-dn
2342, 2356),
13.7mag on May 31 and 13.5mag on June 1 (vsnet-campaign-dn
2490).