RX J1450.5+6403: A new member of SU UMa-type dwarf nova
T. Vanmunster discovered an outburst of RX J1450.5+6403 on 14 May
at 14.4mag
(vsnet-alert 4834).
D. Nogami confirmed the object to
be in quiescence on May 11.10 (UT)
(vsnet-alert 4837). T. Vanmunster
detected superhumps with the period of 0.0617d, and revealed the
current outburst is a superoutburst of a newly discovered SU UMa-type
dwarf nova.
R. Novak performed period analysis
using his data and provided the period of 0.0602(2)d on 16 May
(vsnet-campaign 71).
T. Vanmunster revised the superhump period to
0.0600(2)d using the data before 16 May obtained by CBA team
(vsnet-alert 4852).
He also reported a slightly increased superhump
period of 0.0606(5)d using the data obtained by J. Kemp on May 18/19
(vsnet-alert 4870).
The spectroscopic period of either 0.0588 or
0.0599 d was provided by Thorstensen
(vsnet-alert 4848). The quiescent
photometry obtained at Nyrola observatory team shows a sharp periodicity
at 0.0289 d which is pretty close to the half of the spectroscopic
period. The feature is quite reminiscent of other short-period SU UMa
systems and possible eclipses are suggested
(vsnet-campaign 81,
82).
D. Nogami analyzed their quiescent data just before the outburst
(7, 10, and 11 May) and provide a period estimation of 0.056 d
(vsnet-alert 4868).
In the data obtained by R. Novak, there are
significant QPOs superimposed on the fading branch of superhumps
(vsnet-campaign 83).
The QPOs are confirmed by T. Vanmunster
(vsnet-alert 4870).
T. Vanmunster reported that this newly discovered SU UMa-type dwarf
nova entered the rapid decline phase after first detected superoutburst
(vsnet-alert 4885).
E. Pavlenko reported this SU UMa star was brightened up to R=14.8
on 25/26 June, and the mean magnitude of 24/25 June was R=16.6
(vsnet-campaign 252).
On June 26, T. Vanmunster confirmed the outburst (15.9mag), which
implied the outburst was short and faint
(vsnet-campaign 258).
The observation on June 27 by A. Henden also agree with the decline
trend
(vsnet-campaign 259).
T. Vanmunster additionally reported his pre-outburst observations in
[vsnet-campaign 263].