Superhumps and flickering in V1316 Cygni
Abstract
We present analysis and results of a coordinated CCD photometry campaign to observe the 2006 June superoutburst of the cataclysmic variable V1316 Cyg involving eight longitudinally-distributed observers. The outburst peaked at magnitude 15.03 on 2006 June 10, declined at a rate of 0.14 mag/day, lasted 11 days and had an amplitude above quiescence of 2.4 magnitudes. We detected common superhumps for the first time, thereby confirming that V1316 Cyg is a member of the UGSU class of dwarf novae. We observed a transition to late superhumps two-thirds of the way through the outburst with an associated phase shift of 0.50 ± 0.06 cycles. The mean common superhump period before this transition was 0.07685 ± 0.00003d and the mean late superhump period following the transition was 0.07654 ± 0.00002d. At the onset of late superhumps, there was a transient shift in power from the superhump fundamental frequency to its first harmonic and back again. We detected an orbital period of 0.0740 ± 0.0002d giving a fractional superhump period excess of 0.038 ± 0.003 and a mass ratio of 0.167 ± 0.010.
- Publication:
-
Journal of the British Astronomical Association
- Pub Date:
- June 2008
- DOI:
- 10.48550/arXiv.0710.1653
- arXiv:
- arXiv:0710.1653
- Bibcode:
- 2008JBAA..118..149B
- Keywords:
-
- Astrophysics
- E-Print:
- Accepted for publication in the Journal of the British Astronomical Association, 18 pages, 12 figures