J/A+A/486/505 V light curve of SDSS J080434.20+510349.2 (Zharikov+, 2008)
Cyclic brightening in the short-period WZ Sge-type cataclysmic variable
SDSS J080434.20+510349.2.
Zharikov S.V., Tovmassian G.H., Neustroev V.V., Michel R., Zurita C.,
Echevarria J., Bikmaev I.F., Pavlenko E.P., Jeon Y.-B., Valyavin G.G.,
Aviles A.
<Astron. Astrophys. 486, 505 (2008)>
=2008A&A...486..505Z 2008A&A...486..505Z
ADC_Keywords: Binaries, cataclysmic ; Stars, variable ; Photometry
Keywords: stars: dwarf nova - stars: cataclysmic variables -
methods: observational -- techniques: photometric
Abstract:
We observed a new cataclysmic variable (CV) SDSS J080434.20+510349.2
to study the origin of long-term variability found in its light curve.
Multi-longitude, time-resolved, photometric observations were acquired
to analyze this uncommon behavior, which has been found in two newly
discovered CVs.
This study of SDSS J080434.20+510349.2 concerns primarily the
understanding of the nature of the observed, double-humped, light
curve and its relation to a cyclic brightening that occurs during
quiescence. The observations were obtained early in 2007, when the
object was at about V∼17.1, about 0.4mag brighter than the
pre-outburst magnitude. The light curve shows a sinusoidal variability
with an amplitude of about 0.07mag and a periodicity of 42.48min,
which is half of the orbital period of the system. We observed in
addition two "mini-outbursts" of the system of up to 0.6mag, which
have a duration of about 4days each. The "mini-outburst" has a
symmetric profile and is repeated in approximately every 32days.
Subsequent monitoring of the system shows a cyclical behavior of such
"mini-outbursts" with a similar recurrence period. The origin of the
double-humped light curve and the periodic brightening is discussed in
the light of the evolutionary state of SDSS J080434.20+510349.2.
Objects:
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RA (2000) DE Designation(s)
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08 04 34.2 +51 03 49 SDSS J080434.20+510349.2
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
lc.dat 21 11293 Time-resolved photometric data of
SDSS J080434.20+510349.2
lc.fits 2880 34 Fits file of light curve
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See also:
V/123 : Catalog of Cataclysmic Variables (Downes+ 2001-2006)
J/A+AS/101/87 : Walraven phot. of 8 Cataclysmic variables (Hollander+ 1993)
J/PASP/109/441 : Northern Cataclysmic Variables (Henden+ 1997)
J/A+A/332/586 : Cataclysmic variables light curves (Bruch 1998)
J/A+A/456/599 : Light curves of 5 cataclysmic variables (Papadaki+, 2006)
J/ApJ/565/511 : Cataclysmic variables in the 2MASS 2IDR (Hoard+, 2002)
J/other/NewA/13.133 : 2MASS photometry of cataclysmic variables (Ak+, 2008)
Byte-by-byte Description of file: lc.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date HJD
15- 21 F7.4 mag Vmag V band magnitude
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Acknowledgements:
Sergey Zharikov,
(End) Patricia Vannier [CDS] 20-May-2008