[vsnet-alert 6851] 1RXS J232953.9+062814 in quiescence

[Gaghik Tovmassian <gag@astrosen.unam.mx>]

1RXS J232953.9+062814 in quiescence  (submitted to IAUC)
S.V. Zharikov, G.H. Tovmassian,  Observatorio Astronomico Nacional,
IA UNAM (Mexico).



The  1RXS  J232953.9+062814  had  been  classified  as  a  cataclysmic
variable by Jingyao,  H. et al.(Ann. Shanghai Obs.,  Acad. Sin., 1998,
19, 235).  Prior  to the outburst detection by  P. Schmeer (IAUC 7747)
on  November 3.926  (UT) our  team observed  1RXS  J232953.9+062814 in
quiescence.

The CCD photometry was made with 1.5 m telescope of OAN SPM on October
25th  and  26th, 2001  (JD  2452207,  2452208).   Comparison with  the
photometric standard field of  PG2213-006 revealed that the object had
a mean  magnitude of B=16.8  in quiescence.  The object  was monitored
during 3.42 +  2.5 hours. It showed approximately  0.2 mag variability
in B  band.  Period analysis based  on DFT methods  leads to extremely
short period for  the CV of about 0.0228  days. However the lightcurve
shows minimas  of slightly different depth. Comparing  to the outburst
lightcurves obtained  by VSNET group  (IAUC 7747) we can  safely state
that the  lightcurve is  double humped and  the orbital period  of the
system  is two  times  longer.  The  second  order peak  in the  power
spectrum at  around 0.045 days is  split in two  equipollent values at
P1=0.0446(1) and P2=0.0466(1).  The  duration of our observational run
is   not  sufficient   to   distinguish  between   these  two   values
unambiguously.  However the folded data looks less scattered and shows
more pronounced  second shallow minimum when the  P1=0.0446 days value
is used. This value is also  shorter by 3.7 percent than the period of
assumed superhumps found by VSNET team during outburst. The lightcurve
folded by this period is available at:
http://bufadora.astrosen.unam.mx/~gag/rxj2329.5+0628.
Meanwhile the
second value  of P2=0.0466 is  longer than the superhump  period.  The
reason for doublehump structure in the lightcurve is not clear yet and
will need more careful investigation.

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