[vsnet-alert 309] S10932 fading; eclipse times

[tkato@kusastro.kyoto-u.ac.jp]

  V-band CCD observations at Ouda Station (Kyoto University) indicates
that S10932 was fading rapidly on Jan. 2.  An approximate magnitude
outside eclipses was V=14.8 on Jan. 2.89, while the object was observed
at around V=14.0 on Jan. 1.83-1.89 (magnitudes were calibrated using GO Com
and AL Com secondary standards).  This fact suggests that the present
outburst of S10932 is a normal one, which is also supported by the lack
of apparent superhumps.

  Following mid-eclipse times were also obtained:

  JD 2450085.21978  (HJD 2450085.22081)
     2450085.30667       2450085.30771

  The depth of the second eclipse was 3.2 mag, which is one of the deepest
known among outbursting dwarf novae.  The duration of eclispes were ~10 min.

  From available eclipse times (with those in IBVS 4182), we have obtained
the following two candidates of improved ephemerides.

(1)
  Min.HJD = 2449486.48095 + 0.0870261 E
              50085.30771 + 0.0870261 E

  observed    E       O-C
(+2400000)
49484.39340  -24    0.00107
49484.48070  -23    0.00135
49486.48160    0    0.00065
49488.39090   22   -0.00463
49488.48410   23    0.00155
50084.35030 6870   -0.00012
50085.22081 6880    0.00013
50085.30771 6881    0.00000

(2)
  Min.HJD = 2449486.48096 + 0.0870388 E
              50085.30775 + 0.0870388 E

  observed    E       O-C
(+2400000)
49484.39340  -24    0.00137
49484.48070  -23    0.00163
49486.48160    0    0.00064
49488.39090   22   -0.00491
49488.48410   23    0.00125
50084.35030 6869   -0.00003
50085.22081 6879    0.00009
50085.30771 6880   -0.00004

Regards,
Taichi Kato & Ouda team

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