[vsnet-alert 1179] CVC 149 (USNO 1425.09823278, FX Cep)

[Tonny Vanmunster <tvanmuns@innet.be>]

BELGIAN ASTRONOMICAL SOCIETY V.V.S. -  Working Group Variable Stars
Cataclysmic Variables Circular No.149            1997, September 06
Ed.: T. Vanmunster, Walhostraat 1A, 3401 Landen, BELGIUM
     Internet: tvanmuns@innet.be                  TEL. 32-11-831504
     CVC Web Page : http://vsnet.astro.columbia.edu/~cba/cvc
===================================================================

USNO 1425.09823278 [CV:, 13.3R - 19.9R]
=======================================

Tonny Vanmunster, Landen, Belgium, obtained unfiltered CCD observations
of this newly discovered variable star on September 5/6, 1997, during
a 5.9h run, using a ST-7 SBIG CCD camera attached to a 25-cm f/6.3 SCT.
2 * 2 on-chip summation was used, with exposure times of 50 sec and 
60 sec, depending on atmospheric conditions.

A visual inspection of the resulting light curve does not show
superhumps, although an analysis using the Phase Dispersion Minimi-
zation (PDM) method of R.F. Stellingwerf yields a weak signal with
a period of 0.057 +/- 0.001 d, which might very well be attributed to 
the superhump. We applied standard data reduction techniques (dark 
frame and flat field correction, as well as removal of a linear trend 
of decline).

The object is declining rapidly from its 'outburst', so we strongly
encourage follow-up observations.


FX Cep [UGSS?, 15.0p - 17.5p]
=============================

In response to the FX Cep outburst announcement in CVC 148, Jochen
Pietz, Germany remarks that he observed another outburst of this
CVAP object about one month ago, which was brighter than the current
one (reaching mag. 14.7 on JD 2450666.463). The object was also seen 
on the next two nights, but then became fainter than mag 15.0.
J. Pietz further adds : "Remember that AB Dra reveals a similar short 
outburst cycle (10 days) and the existence of long (and slightly 
brighter) outbursts and is classified as ZCAM star."

Additional observations of the present outburst :

1997 Aug 30.92  UT, [15.4  (T. Kinnunen, Finland, visual);
     Aug 31.90  UT,  15.1  (T. Kinnunen);
     Sep 01.86  UT,  15.4  (T. Kinnunen);
     Sep 02.854 UT,  15.6  (T. Vanmunster, 0.25-m refl., unfilt. CCD);
     Sep 02.87  UT,  15.5  (T. Kinnunen);
     Sep 03.90  UT, [15.7  (T. Kinnunen);
     Sep 04.87  UT, [15.7  (T. Kinnunen);


Tonny Vanmunster

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