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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
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:
    ----------------------------------------------------
       RA   (2000)   DE      Designation(s)
    ----------------------------------------------------
    08 04 34.2   +51 03 49   SDSS J080434.20+510349.2
    ----------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

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


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

   Bytes Format Units   Label     Explanations

   1- 12  F12.4 d       HJD       Heliocentric Julian date HJD
  15- 21  F7.4  mag     Vmag      V band magnitude


Acknowledgements:
    Sergey Zharikov, 
(End)                                        Patricia Vannier [CDS]  20-May-2008