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[vsnet-obs 3482] CVC 105 (V1060 Cyg, V630 Cyg, V1028 Cyg)

BELGIAN ASTRONOMICAL SOCIETY V.V.S. -  Working Group Variable Stars
Cataclysmic Variables Circular No.105               1996, August 18
Ed.: T. Vanmunster, Walhostraat 1A, 3401 Landen, BELGIUM
     Internet: tvanmuns@innet.be                  TEL. 32-11-831504
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         The CATACLYSMIC VARIABLES Home Page: http://vsnet.cv.psi.edu
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V1060 Cyg [UGSS, 13.5p - 18p]
=============================

This CVAP object is undergoing an outburst, as reported by Eric Broens 
(visual), Mol, Belgium, Jochen Pietz (visual), Erftstadts, Germany,
Gary Poyner (visual), Birmingham, UK and Lasse Jensen (CCD), Farum, 
Denmark :

1996 Aug 18.88  UT,  13.1  (J. Pietz);
     Aug 18.926 UT,  13.9  (G. Poyner);
     Aug 18.959 UT,  12.9  (E. Broens, seq: Kato);


The object was last seen in outburst on Oct 20, 1995 by M. Moriyama
[CVC 65], and reached mag 12.8 during this long and bright outburst
[CVC 67]. Follow-up observations are encouraged.


V630 Cyg [UGSU, 13.4p - 17.2p]
==============================

The true nature of this CVAP object, suspected to be a UGSU-type dwarf 
nova [see CVC 103, and our call for follow-up observations], finally 
has been revealed by CCD photometry at Ouda Station, Kyoto University,
Japan. Daisaku Nogami communicates : "We, Ouda Team, have caught 
superhumps in V630 Cyg during the observation on Aug. 18.  V630 Cyg is, 
thus, identified as a member of SU UMa stars.  Our preliminary period 
analysis gives 0.079 (+- 0.003) d as the best estimated superhump 
period. Thanks to all V630 Cyg observers for encouraging our 
observations !"



V1028 Cyg [UGSU, 13.0p - 18p]
=============================

The present outburst of V1028 Cyg independently has been recognised
as a superoutburst by two CCD observation teams. 

In a VSNET message, Daisaku Nogami, Ouda Station, Kyoto University, 
Japan states : "Our observation of V1028 Cyg for 3.5 hours on Aug. 18 
has revealed superhumps with an amplitude of 0.2 mag.  So, the
current outburst is confirmed to be a superoutburst!"

Tonny Vanmunster, Landen, Belgium, operating at the CBA Belgium,
obtained unfiltered CCD observations of V1028 Cyg on August 18, 1996,
during a 6 hours run, using an 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 120 sec and a dead-time of 10 sec throughout the observations.
Preliminary data reduction using the Phase Dispersion Minimization
(PDM) method of R.F. Stellingwerf yields a superhump period of approx.
89 min, which is similar to values obtained during the V1028 Cyg
superoutburst in 1995 [CVC 51].


Tonny Vanmunster
Follow-Ups: