TV Crv : Rare superoutburst in February
On February 18, M. Simonsen detected a rare outburst of the
SU UMa-type dwarf nova TV Crv at 12.9mag. The last normal outburst
occurred in 2000 March and the last superoutburst was observed in 1998
May
(vsnet-campaign 767).
The Kyoto team succeeded in obtaining the light curve in very early
phase of the outburst. The light curve on February 18 and 19 showed
modulations with 0.1mag amplitude, but the profile is not similar to
normal superhumps and may be related to early superhumps
(vsnet-campaign 781).
On February 19, the Kyoto team and S. Yoshida detected "super-QPOs",
giant quasi-periodic oscillations only seen at the early (or fading)
epochs of some SU UMa-type systems. The super-QPOs in TV Crv had an
amplitude of ~0.1 mag, and a typical period of 10 min.
The Kyoto observation on Feb. 20 showed fully developed superhumps.
The development of superhumps took 2 or 3 days after the ignition of
the outburst
(vsnet-campaign 785).
In the light curve taken on February 20-24 at Kyoto, we can see
prominent superhumps with slightly smaller amplitude
(vsnet-campaign 795).
M. Uemura reported the superhump period of 0.065024 day using the data
by the Kyoto team
(vsnet-campaign-dn 547).
The superoutburst continued until March 4 when M. Uemura reported it
entered a rapid decline phase
(vsnet-campaign-dn 572).
Other related articles:
vsnet-campaign 768,
769,
770,
786,
vsnet-campaign-dn 506,
509,
512,
518,
522,
526,
536,
560,
543,
550,
563