[vsnet-alert 168] Outburst of V1028 Cyg

[Janet Mattei <jmattei@aavso.org>]

                    OUTBURST OF V1028 CYGNI

The outburst of V1028 Cygni has been independently observed by 
two AAVSO observers who report the following observations:

V1029 Cyg   950727.1563 UT  fainter than 16.0   D. York, AAVSO
            950728.1868                  13.5   D. York, AAVSO 
            950728.2347                  13.5   D. York, AAVSO
            950728.2625                  13.5   T. Burrows, AAVSO
            950729.1486                  12.7   D. York, AAVSO
            950729.1667                  12.7   D. York, AAVSO
            950729.2174                  12.7   D. York, AAVSO

This star has been closely monitored by AAVSO since 1981.  Although
it is classified as an SS Cyg type dwarf nova in the Fourth edition 
of the General Catalog of Variable Stars and also in the Catalog 
and Atlas of Cataclysmic Variables by Downes and Shara (PASP, 105, 
127; 1993), the observations in the AAVSO International Database 
suggest that it may be an SU UMa type - TOAD - dwarf nova. It has had 
several short and faint outbursts that lasted between 1 to 4 days and 
reached maximum magnitude between 13.5 and 14.4.  The AAVSO records 
indicate that the September 1992 outburst was a long one, which started 
on the 5th (as reported, again, by D. York), reached maximum magnitude 
of 12.8 on the 6th and was brighter than magnitude 14.2 until the 
16th of September, 1992.  This may have been a superoutburst. 

The AAVSO observers have been using the AAVSO Preliminary charts 
for this star, prepared by Charles Scovil, the Chairman of AAVSO New 
Charts Committee.  The comparison star magnitudes on the charts are 
visual estimates by Wayne Lowder, a long-time, prolific AAVSO observer 
and the current AAVSO President. 

The fact that the current outburst is bright suggests that it may 
also be a superoutburst. Thus, we highly recommend observations
both visual and in particular with CCDs in search of superhumps 
which would confirm the type of this dwarf nova.

Kind regards,
Janet A. Mattei
AAVSO, Director

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