[vsnet-alert 15620] QZ Ser another rebrightening!
d.v.denisenko at gmail.com
Tue Apr 16 02:01:08 JST 2013
Following [vsnet-alert 15582] I report additional unfiltered
photometry of QZ Ser from MASTER-Amur robotic telescope. Object is
showing abnormal behaviour (similar to AB Nor) in the sense that its
orbital period is ~0.083d, but the outbursts have some features more
typical for WZ Sge-type dwarf novae whose periods are 3/2 times
shorter. QZ Ser doesn't want to return to the quiescent state even one
month after the bright March outburst reported in [vsnet-alert 15480]!
20130405.633 13.61CR MASTER-Amur
20130405.635 13.64CR MASTER-Amur
20130405.636 13.67CR MASTER-Amur
20130406.630 14.87CR MASTER-Amur
20130406.631 14.83CR MASTER-Amur
20130406.632 14.88CR MASTER-Amur
20130408.630 15.92CR MASTER-Amur
20130408.631 15.89CR MASTER-Amur
20130408.632 15.88CR MASTER-Amur
20130411.645 15.95CR MASTER-Amur
20130411.646 15.95CR MASTER-Amur
20130411.647 15.93CR MASTER-Amur
20130415.637 13.45CR MASTER-Amur
20130415.639 13.49CR MASTER-Amur
20130415.640 13.60CR MASTER-Amur
The unusual properties of AB Nor were reported by T. Kato et al.
almost ten years ago in MNRAS paper available at
http://mnras.oxfordjournals.org/content/347/3/861.full (MNRAS Vol.
347, pp. 861-872, 2004). They have noted that AB Nor (together with EF
Peg and V725 Aql) may have low mass-transfer rate comparable to WZ
Sge-type dwarf novae. QZ Ser also has a long superoutburst cycle and
appears to be another extremely interesting member of such "abnormal"
subtype of CVs.
Member of MASTER team at SAI MSU
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